Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Improving FI harness or reinventing the wheel? (completed)
Page: Previous  1, 2, 3  Next
Forum Index -> Bay Window Bus Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
Bleyseng
Samba Member


Joined: July 03, 2005
Posts: 4752
Location: Seattle
Bleyseng is offline 

PostPosted: Sun May 19, 2019 7:43 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

"If you are running Pertronix on a stock distributor take it off and throw it in the garbage."

Why do you say that? I have been running Pertronix in mine since 2006! But I guess to troubleshoot this issue I would go back to stock to sort it out. I would check the CHT first! Pull it and put a ohm meter on it to verify its good.
_________________
70 Ghia Black convert-9/69 build date-stock w/133k 1600 SP-barn find now with a rebuilt tranny and engine
77 Westy 2.0L w/Ljet, Camper Special engine-95hp and with LSD!(sold)
76 Porsche 914 2.1L L20c, 120hp Djet (sold)
87 Syncro Westy Titan Red 2.1L 2 knob 100k miles
Back to top
View user's profile Send private message Send e-mail Visit poster's website Gallery Classifieds Feedback
raygreenwood
Samba Member


Joined: November 24, 2008
Posts: 21474
Location: Oklahoma City
raygreenwood is offline 

PostPosted: Sun May 19, 2019 8:40 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

A couple of observations:

The starting point....yes....your old harness had issues. If it had cracks in wire insulation and frayed wires at strain reliefs and had any pacthes...either soldered or crimped...then you had "some" either high resistance, variable resistance or intermittent connections.

So your CS had on and off idle issues before the harness swap right? Just asking for the record.....did you check and correct every single potential vacuum leak source...

Dipstick boots
Oil chimney
Pcv diaphgram
Runner boots
TB o-ring
TB shaft seal on bottom side
***TB plate fit in TB...this can actually be a pretty big issue
S boot and associated hoses
Runner to head gaskets
Injector seals
Vacuum can on distributor

There are more but I'm making a point.....

Did you check fuel pressure, stability, regulator leak down function?

Did you check all major grounds?
Did you check input voltage to both ignition and to fuel pump?

Did you do a good basic check of the ignition system to make sure everything is spot on?.

And for the record.....I can say that the Pertronix module.....gets about a 50% bad rap....that it does not deserve.

I have had nothing but flawless performance with Pertronix....and yes....on L-jet as well. The only issues I have ever had with it were either from my own doing....or from not paying attention to a wiring issue that needed to be fixed.

HOWEVER......and this is why I say 50% bad rap.....there is not a single thing wrong with the Pertronix module DESIGN.
Its nothing but a switch....just like points.....but cleaner and with less signal degradation.

But there have been some less than stellar quality control here and there over the years.....and except for a few actually defective parts like a bad magnet ring or switch module.....that I have seen others have but never experienced myself......the only real issues....and they are real issues......are the occasional wire crimp quality.....which I automatically fix/replace on ANY points replacement module......AND.....and this is the main issue......there are module bracket fit issues, magnet ring to shaft fit issues etc.....that come NOT from the Pertronix kit itself.....but from the WIDE variation in machine work on distributor shaft cams and points plates over the eons of production.

I think I listed a while back at least 6 different styles of machining to just type 3 and 4 D-jet and L-jet fuel injection system distributor cams. A lot of those same parts are used in 205ps for bus as well.
The Pertronix module installation will also always require a change in distributor body timing position...and can be picky on coil resistance. Things to check

So short of just straight up defective parts....the biggest issue with Pertronix...is that its rarely a five minute drop in mod. If you treat it like it is......you can have less than stellar results.

The vast majority.....of people I have PERSONALLY spoken to ahout Pertronix issues....usually did not fit and finish tuning of the rings and points plate on install.....and only a very few actually found a no-go defect.

So I mentioned all of the vacuum and electrical checks above....because of this point:

If you were running your engine....any engine actually....on 40+ year old sketchy wiring....and/or....a lot of small less than perfect seals and ignition parts..........your engine has been adjusted to work nominally..... around all of those inconsistencies.

Now you put in a "clean" harness....with cleaner signals.....for which the engine is not adjusted to use......and are expecting improvement?

I hsve said this many times before with regard to fuel injection harnesses.....and for that matter.....any fuel injection components..........

DO NOT....replace specific parts.....with NEW parts....if all associated/connected parts.....are not ......FIRST.....made perfect, replaced or very carefullly checked and qualified.

Why?......because if you put a new part in.....say....like a new wiring harness.....and it runs less than correctly..........how the hell are you really going to know which part is actually causing it to not run well???????

Also....even if everything is perfect.....you are now going to have to go through normal tune up.....adjusting idle, timing and AFM bypass to work with the minor changes that having cleaner EFI signal has made to the system....if it made any difference at all.

Ray
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
SGKent Premium Member
Samba Member


Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
SGKent is offline 

PostPosted: Sun May 19, 2019 9:19 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

Ray it is hit and miss from what I read. I am not making these things up.


From Pertronix FAQ

Quote:
PerTronix Ignitor and Ignitor II will work with many aftermarket Electronic Fuel Injected (EFI) systems. As long as the EFI system can be triggered with a square wave signal from coil negative it will work with the Ignitor or Ignitor II. Some EFI systems just call this a points signal. Some EFI system's needs a sine wave signal from something like a magnetic pick up distributor to be triggered. We also over these type distributors for many engine applications. Most all EFI system will work our Digital HP box for maximum performance. From the Digital HP box we offer a 5-volt square signal, which will trigger most EFI systems. I'm sorry the Ignitor III will not work with a EFI system because of the multiple strikes that happen on coil negative. You could add our digital HP box to allow the Ignitor III to work your EFI system. Or switch the Ignitor III to our Ignitor or Ignitor II systems. Ignition General Help, Ignitor Application Inquiry


From a verified purchaser at Amazon with an Bosch L-jet:

Quote:
Product not configured for my Bosch distributor as advertised, required changes to my equipment and re-routing in engine bay, ingenuity & hassle in general. And some of the internals of the distributor need to be removed, ground down and replaced in order to clear the spinning magnet. Then the fuel injection system needed re-tuning, to my surprise. Not a big deal but unexpected, a little puzzling. Now engine runs 10-15 centigrade degrees hotter, doesn't idle as smoothly as with the points setup: more odd. Pertronix says one of the advantages of their product is a much steeper (faster) build and collapse of spark. This was attractive, seemed to make sense. People who seem more knowledgeable than me say that Pertronix has effectively extended the firing time (spark duration) to more or less fill that whole time when the old, conventional spark curve was building up and collapsing down in a smooth curve (like the cross-section of a speed bump) with their square-cornered, full-on extended spark for the full duration. Sounds great, might give better power and more mileage but definitely results in hotter head temperatures: not so sure I like that part. Engine runs about the same on the road -- certainly not stunningly better/faster/louder or anything else;maybe a little less sweet somehow. First fuel fill surprised me by giving about 40% REDUCED mileage. I'll leave it installed for awhile and see what more I can learn, but..........


From CIP1 re Ignitor III:
Quote:
Please Note: The Pertronix Ignitor III will NOT work on fuel injected engines.



Samba thread:
Quote:
Mark70baja Mon Apr 27, 2015 8:42 am
Both of the guys I've spoken with at Pertronix tell me they make "nothing" for either the federal or CA 2.0 models except wires. I keep hearing that it's been done. One guy in Oregon, who rebuilds distributors, told me that he could make it work. But after speaking with him I have serious doubts. And then there is the, "no guarantee" part.

Glad I finally got the burning up points thing resolved.

_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
raygreenwood
Samba Member


Joined: November 24, 2008
Posts: 21474
Location: Oklahoma City
raygreenwood is offline 

PostPosted: Sun May 19, 2019 11:53 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

SGKent wrote:
Ray it is hit and miss from what I read. I am not making these things up.


From Pertronix FAQ

Quote:
PerTronix Ignitor and Ignitor II will work with many aftermarket Electronic Fuel Injected (EFI) systems. As long as the EFI system can be triggered with a square wave signal from coil negative it will work with the Ignitor or Ignitor II. Some EFI systems just call this a points signal. Some EFI system's needs a sine wave signal from something like a magnetic pick up distributor to be triggered. We also over these type distributors for many engine applications. Most all EFI system will work our Digital HP box for maximum performance. From the Digital HP box we offer a 5-volt square signal, which will trigger most EFI systems. I'm sorry the Ignitor III will not work with a EFI system because of the multiple strikes that happen on coil negative. You could add our digital HP box to allow the Ignitor III to work your EFI system. Or switch the Ignitor III to our Ignitor or Ignitor II systems. Ignition General Help, Ignitor Application Inquiry


From a verified purchaser at Amazon with an Bosch L-jet:

Quote:
Product not configured for my Bosch distributor as advertised, required changes to my equipment and re-routing in engine bay, ingenuity & hassle in general. And some of the internals of the distributor need to be removed, ground down and replaced in order to clear the spinning magnet. Then the fuel injection system needed re-tuning, to my surprise. Not a big deal but unexpected, a little puzzling. Now engine runs 10-15 centigrade degrees hotter, doesn't idle as smoothly as with the points setup: more odd. Pertronix says one of the advantages of their product is a much steeper (faster) build and collapse of spark. This was attractive, seemed to make sense. People who seem more knowledgeable than me say that Pertronix has effectively extended the firing time (spark duration) to more or less fill that whole time when the old, conventional spark curve was building up and collapsing down in a smooth curve (like the cross-section of a speed bump) with their square-cornered, full-on extended spark for the full duration. Sounds great, might give better power and more mileage but definitely results in hotter head temperatures: not so sure I like that part. Engine runs about the same on the road -- certainly not stunningly better/faster/louder or anything else;maybe a little less sweet somehow. First fuel fill surprised me by giving about 40% REDUCED mileage. I'll leave it installed for awhile and see what more I can learn, but..........


From CIP1 re Ignitor III:
Quote:
Please Note: The Pertronix Ignitor III will NOT work on fuel injected engines.



Samba thread:
Quote:
Mark70baja Mon Apr 27, 2015 8:42 am
Both of the guys I've spoken with at Pertronix tell me they make "nothing" for either the federal or CA 2.0 models except wires. I keep hearing that it's been done. One guy in Oregon, who rebuilds distributors, told me that he could make it work. But after speaking with him I have serious doubts. And then there is the, "no guarantee" part.

Glad I finally got the burning up points thing resolved.


Taken in order:

1. As I STATED......in not so many words......I was speaking of the BASIC Pertronix module.

NOT....the Pertronix 2 or 3.

And....right along what Pertronix stated in the excerpt you posted......read that excerpt carefully.
The vast majority of issues with Pertronix and stock injection...happen with Pertronix 2 and 3.....not the Pertronix 1
The Pertronix 1 is a magnetic pickup. I have had no issues with L-jet with this system. That does not mean that there are not probahly some late L-jet systems that will have issues with it....but those that I have put it on in 412 and 914...early basic L-jet....have had no issues with Pertronix 1.

And.....there are 6 major variants of L-jet....and a total of about 11 variants if you look at some of the lkcense built versions from Japan....so yes there could be some issues.....but for the most part...with basic L-jet.....there are no real issues.

2. From Amazon from a verified purchaser using Bosch L-jet........uh.....which of the 6 main versions was this person using?

And.....also as stated.....there are so many variations in distributor design, casting, machining......that its not surprising that SOMETHING would need to be ground down or tuned.....but only an IDIOT would grind the distributor. You grind the Pertronix bracket.....not the distributor...... On many cars....and not even speaking just ACVW.....both Pertronix and compufire had bracket fit issues....mostly with screw locations....but many times also with points plate and clocking locations of advance cans.

Also....most people who have to start wholesale grinding.....I usually find they ordered the wrong unit. There are difgetent variations for mechanical and vacuum distributors......

And.....for sure the engine will have to be retuned for timing. 100% of all engines I have installed a points replacement module in...needed at bare minimum.....timing and idle re-set. To not do so.....or not understand why....is the issue of the owner/mechanic and not the Pertronix.

And.....this says it all. There is "0" way a Pertronix module can cause 10-15° head temp being hotter.....unless during the timing "retuning" the owner screwed something up. And....add to that....10-15° temp difference is a stupid reply. You can have twice that just with a change in ambient temps or atmospheric pressure.

What I see is the usual .....thinks its a 100% drop in mod. The stated need for re-routing anx ingenuity????? Really?.....for a points module? Like Pertronix 1?

Doubtful. A complete Pertronix distributor....maybe so....but that not what one should be using in a stock injected VW bus in the first place.

3. The reply from CIP1......is BS. It WILL work on fuel injected engines.....just not bus with early L-jet....AND......AGAIN.....thats a Pertronix 3.....not what we are speaking of here.

4. The reply from Pertronix about not making anything for Federal of Ca 2.0 except,wires.

Possible. As I noted....many versions of L-jet. However.....without going to that thread....sre we speaking of P-1....or complete distributors?

Ray
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
SGKent Premium Member
Samba Member


Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
SGKent is offline 

PostPosted: Sun May 19, 2019 1:06 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

Popcorn

Everything works well until you have to walk one time when it doesn't. The guy who handled rattlesnakes was safe for years until he met one that hit above the boot line.
_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
otiswesty
Samba Member


Joined: November 21, 2006
Posts: 1729
Location: Portland
otiswesty is offline 

PostPosted: Mon May 20, 2019 9:26 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

Thanks for the detailed responses. I do not have Pertronix or Megasquirt. Just stock L-jet with stock dizzy and points. The only thing that isn't old stock is the cam, heads, and con rods. I have gone through many of the suggested items and will continue to trouble shoot based on your suggestions.

I'm stuck driving my 1982 Mercedes 280 until this is sorted, which is cool. It needs some love too.
_________________
1978 Sage Green P22 Westfalia
1989 T3 Syncro Single cab

Just a regular guy
Back to top
View user's profile Send private message Gallery Classifieds Feedback
SGKent Premium Member
Samba Member


Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
SGKent is offline 

PostPosted: Tue May 21, 2019 5:41 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

you want to do a smoke test to see if there are any vacuum leaks. The most common error I make when hooking my engine back up is forgetting to plug in the AFM. Also - some people forget the ground wire on the double relay.
_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
otiswesty
Samba Member


Joined: November 21, 2006
Posts: 1729
Location: Portland
otiswesty is offline 

PostPosted: Wed May 22, 2019 4:47 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

Not sure what the leads in yellow go to. Should they be grounded?
I have a query out to Kyle also.

The brown circled lead is to my engine grounding tab near cyl #3.

Image may have been reduced in size. Click image to view fullscreen.

_________________
1978 Sage Green P22 Westfalia
1989 T3 Syncro Single cab

Just a regular guy
Back to top
View user's profile Send private message Gallery Classifieds Feedback
SamboSamba22
Samba Member


Joined: August 06, 2015
Posts: 2772
Location: Benton, Arkansas
SamboSamba22 is offline 

PostPosted: Wed May 22, 2019 4:55 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

otiswesty wrote:
Not sure what the leads in yellow go to. Should they be grounded?
I have a query out to Kyle also.

The brown circled lead is to my engine grounding tab near cyl #3.

Image may have been reduced in size. Click image to view fullscreen.

This is Kyle’s wiring harness?
_________________
The Bus Barn Ltd. Co.

Oct. ’67 Double Cab (’68 Crew Cab)
[url=http://www.vw-mplate.com/mplate-44412.png]Click to view image[/URL]
March '69 Delivery (Panel Bus)
[url=http://www.vw-mplate.com/mplate-44414.png]Click to view image[/URL]
Back to top
View user's profile Send private message Send e-mail Facebook Instagram Gallery Classifieds Feedback
airschooled
Air-Schooled


Joined: April 04, 2012
Posts: 12688
Location: on a bike ride somewhere
airschooled is offline 

PostPosted: Wed May 22, 2019 5:14 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

Those are for a throttle switch, which was mounted on the throttle body until the FI changed a little in mid-76. If you have a later model, tuck them out of the way and thank Kyle for making one universal harness instead of splitting part numbers and making each harness custom.

Did any weird ‘79 setups have those switches? I’ve only seen them on earlier FI buses.

Robbie
_________________
Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com
Back to top
View user's profile Send private message Send e-mail Visit poster's website Instagram Gallery Classifieds Feedback
aerosurfer
Samba Member


Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
aerosurfer is offline 

PostPosted: Thu May 23, 2019 3:09 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

SamboSamba22 wrote:
otiswesty wrote:
Not sure what the leads in yellow go to. Should they be grounded?
I have a query out to Kyle also.

The brown circled lead is to my engine grounding tab near cyl #3.

Image may have been reduced in size. Click image to view fullscreen.

This is Kyle’s wiring harness?


No kidding? Using a split loom covering? Are there really no boots on the connector ends?

I still love my homemade one from this thread. Has held up without issue using the shrink covering.
_________________
Rebuild your own FI Harness..My Harness

77 Westy 2.0L Rockin and Rolling Resto!

72 Sportsmobile (sold)
79 Tran$porter... Parts car money machine (gone)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
THall
Samba Member


Joined: August 25, 2010
Posts: 324
Location: Verona, WI
THall is offline 

PostPosted: Thu May 23, 2019 4:28 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

My guess is that's not a KYLE harness.

I have one, and it wasn't constructed like that.
_________________
'78 Westy - 2.0 FI
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Wasted youth
Samba Member


Joined: July 06, 2012
Posts: 5134
Location: California's Hot and Smoggy Central Valley
Wasted youth is offline 

PostPosted: Thu May 23, 2019 5:58 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

That looks like the same picture of the wiring harnesses found on KYLE's website:

http://kyleautomotivespecialties.com/76-79-bus/
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
airschooled
Air-Schooled


Joined: April 04, 2012
Posts: 12688
Location: on a bike ride somewhere
airschooled is offline 

PostPosted: Thu May 23, 2019 6:10 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

This has been covered before... Each individual wire has a silicone grommet/insert in the plug itself to keep contaminants out. His website has an option if you’d like to add the stock style boots too for an extra cost.

Robbie
_________________
Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com
Back to top
View user's profile Send private message Send e-mail Visit poster's website Instagram Gallery Classifieds Feedback
ivwshane
Samba Member


Joined: May 19, 2011
Posts: 1920
Location: Sacramento ca
ivwshane is offline 

PostPosted: Thu May 23, 2019 9:02 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

asiab3 wrote:
This has been covered before... Each individual wire has a silicone grommet/insert in the plug itself to keep contaminants out. His website has an option if you’d like to add the stock style boots too for an extra cost.

Robbie


It has been covered before but I have yet to see anyone post a pic that included boots and that didn't use a split loom covering.
_________________
77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab
Back to top
View user's profile Send private message Gallery Classifieds Feedback
airschooled
Air-Schooled


Joined: April 04, 2012
Posts: 12688
Location: on a bike ride somewhere
airschooled is offline 

PostPosted: Thu May 23, 2019 10:19 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

ivwshane wrote:
asiab3 wrote:
This has been covered before... Each individual wire has a silicone grommet/insert in the plug itself to keep contaminants out. His website has an option if you’d like to add the stock style boots too for an extra cost.

Robbie


It has been covered before but I have yet to see anyone post a pic that included boots and that didn't use a split loom covering.


Those are the extra cost options. And these are VW hobbyists we’re talking about. Wink

Robbie
_________________
Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com
Back to top
View user's profile Send private message Send e-mail Visit poster's website Instagram Gallery Classifieds Feedback
greenbeetle74
Samba Member


Joined: December 05, 2016
Posts: 28
Location: The Netherlands
greenbeetle74 is offline 

PostPosted: Mon Nov 25, 2019 2:00 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

I rebuild my own FI harness last year. Kyle's was too expensive for me.
It wasn't the price of the harness only, but also shipping and duties to Europe on top.

Now I'm very happy with my new FI harness. The engine runs very smooth and I was suprised by the improved gas mileage since my new harness. Very Happy



Image may have been reduced in size. Click image to view fullscreen.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
ivwshane
Samba Member


Joined: May 19, 2011
Posts: 1920
Location: Sacramento ca
ivwshane is offline 

PostPosted: Mon Nov 25, 2019 3:26 pm    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

greenbeetle74 wrote:
I rebuild my own FI harness last year. Kyle's was too expensive for me.
It wasn't the price of the harness only, but also shipping and duties to Europe on top.

Now I'm very happy with my new FI harness. The engine runs very smooth and I was suprised by the improved gas mileage since my new harness. Very Happy



Image may have been reduced in size. Click image to view fullscreen.


That looks pretty clean. What did you use for sheathing?
_________________
77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab
Back to top
View user's profile Send private message Gallery Classifieds Feedback
greenbeetle74
Samba Member


Joined: December 05, 2016
Posts: 28
Location: The Netherlands
greenbeetle74 is offline 

PostPosted: Fri Nov 29, 2019 3:51 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

ivwshane wrote:
greenbeetle74 wrote:
I rebuild my own FI harness last year. Kyle's was too expensive for me.
It wasn't the price of the harness only, but also shipping and duties to Europe on top.

Now I'm very happy with my new FI harness. The engine runs very smooth and I was suprised by the improved gas mileage since my new harness. Very Happy



]


That looks pretty clean. What did you use for sheathing?


@ivwshane:
I used Techflex Insultherm and Techflex Nylon Multi sleeving. Both are high temperature and Oil/Fuel resistant. These products are designed for automotive applications.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
raygreenwood
Samba Member


Joined: November 24, 2008
Posts: 21474
Location: Oklahoma City
raygreenwood is offline 

PostPosted: Fri Nov 29, 2019 8:57 am    Post subject: Re: Improving FI harness or reinventing the wheel? (completed) Reply with quote

Yes....TechFlex is one of several companies that make flexible, expandable braided sheathing in many flavors.....high temp, EMI shielding, sealed....meaning silicone and/or elastomer sheathed....some with end cap/cut end plugging solutions.....and most available in "non-split".

Its "what to use" for sheathing when you realize being factory "visually" correct is meaningless and actual performance is everything.

After rereading this three year old thread.....a comment or two. I have been working on Bosch/vw injection systems for about 40 years now. Some of the observations early in this thread kind of come about from only getting into these systems.....in the last few years...when a lot of what people say is based upon what they know....of more modern injection.

The comment that VW set the bar low on these harnesses......is incorrect. What you see connector wise.....in the L-jet system......is a HUGE advancement over what came before....and was actually Bosch.....taking advice from AM0 and using some techniques and parts from the Aerospace industry.

The harness sheathing materials and boots.....for auto....are working in a totally different environment than aerospace and needed totally different materials, temp ranges and sealing......and....were pretty much working at the limits of available and practical affordability for the era.

At that point in time....there was nothing better. And if you look closely at what utter crap GM foisted upon the world all the way through the 90s......you will take a different point of view of VW/Bosch.

That being said......to see some of the exact sheathing and sealing techniques being held/used by VW through and into the 90s when they already had better material advancements by the mid 80s.....was purely either a money saving move by upper management but just as equally likely...lazy engineering. Ray
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Bay Window Bus All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: Previous  1, 2, 3  Next
Page 2 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2023, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB
Links to eBay or other vendor sites may be affiliate links where the site receives compensation.