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Thu Jul 19, 2018 2:02 pm

Anyone running these in their bus? I just picked up a set from FLAPS. I'm about to switch out soon and just wanted to make sure the extended tip wont protrude too far into the combustion chamber. The last thing I want would be one of these to touch the top of the piston.

Thu Jul 19, 2018 2:15 pm

I wouldn't do it.

Thu Jul 19, 2018 2:24 pm

Ralph, what engine are you working on? If it is for a T4, go look at a photo of the combustion chamber and that alone will answer your question. If it is for a T1 upright I don't know. Might have to put clay on it and see what the clearance is.

Thu Jul 19, 2018 2:45 pm

This is for a 1.7L Type 4.

Here is a pic of the AMC combustion chamber. Looks like the plug runs pretty parallel to the deck.

If its not a good idea, I will return the plugs and grab some B6ES's like I have in there now.

Thu Jul 19, 2018 2:53 pm

That is the best plug to run. That is all I do run.

Thu Jul 19, 2018 2:58 pm

Randy in Maine wrote: That is the best plug to run. That is all I do run.

Do you happen to know what deck height you are running? Mine is pretty tight.

Thu Jul 19, 2018 3:20 pm

Well f@ck! This is what I'm using and there is no way I bought these on my own without researching them. Where did I get the idea to use these? As far as I know I haven't had any issues with them. Unfortunately, I have no idea what my engine consists of.

Ratwell says to avoid these types but does recommend the NGK B6ES if you can't find the Bosch w7cc or w8cc.

Thu Jul 19, 2018 3:23 pm

don't know if this will help

Thu Jul 19, 2018 3:26 pm

The BP6ET....and the Bosch W7DTC....both triple electrode plugs....are THE BEST sparkplugs for ANY type 4 engine that I have ever found. I have installed them in every type 4 engine I ever put a wrench on. They especially like a little more power than the basic limp 18kv coil....but they still run well with that.

They run excellent with the later vanagon style electronic ignitions with the 55kv coil and excellently with a pertronix 42kv flamethrower coil with points or module.

Most of the the 914 guys use these.....John at Aircooled.net swears by them....and I have used them in many buses. Great plug. Both are the exact correct heat range and length. They are the same length and thread as the stock plug.
Its all I use on type 4.
Ray

Thu Jul 19, 2018 3:34 pm

raygreenwood wrote: The BP6ET....
…
Its all I use on type 4.
Ray

Ha! I was searching for old posts by you for that exact recommendation so I could post it here. They worked excellently on my 2.0 FI T4 bus a few years ago.

Robbie

Thu Jul 19, 2018 4:13 pm

raygreenwood wrote: The BP6ET....
...run excellent with the later vanagon style electronic ignitions
I will attest to that.

Also, NGK doesn't seem to have cheapened the quality of their spark plugs as Bosch has done.

Thu Jul 19, 2018 5:03 pm

SlowLane wrote: raygreenwood wrote: The BP6ET....
...run excellent with the later vanagon style electronic ignitions
I will attest to that.

Also, NGK doesn't seem to have cheapened the quality of their spark plugs as Bosch has done.

Actually....as far as these plugs....the Bosch W7DTC.....I have seen no drop in quality in the Bosch plugs. In fact....the W7DTC's.....both old and new packages I have...are all still made in Germany.
Some of the other Bosch plugs.....yes...agree.

And....for the record....in a couple of VERY small ways....the NGK BP6ET....is made cheapdr than the Bosch W7DTC. It is not significant performance wise. They both perform identically. I prefer the Bosch for one very small reason....but I will use either happily.

First Here is my personal stash..... :D This is 2.5 boxes of W7DTC. I have about 2 more stored. Got them for a song on Ebay.

Ok....to RalphWiggam....the fit in the stock 1.7L head is perfect. It has mo issues with deck on any of the type 4 heads. It fits just like the stock plug.

Sorry for the dirty old plugs....here is a clean W7DTC

The two small items of difference between the NGK BP6ET and the Bosch W7DTC:

1. The Bosch on the right has a heftier hex nut.

2. Notice the difference in color. Some assume that because the NGK is "brighter" that its superior. In fact its simply "bright nickel" which is just fine but its got additives to make it easier cheaper and more economical to plate......thinner. And its prettier. Bright nickel was created to look better.
The Bosch plugs are using a traditional straight nickel....and its thicker than the plating on the NGK. Its not a significant thing. They are both nickel plated.

But...these are two previously gnarly and lightly cleaned up plugs. The one on the right is Bosch and the one on the left NGK. They both have about 50k miles on them with re-gappings at about 15k.

The carbon ALWAYS cleans up nicely on the Bosch....and stays black on the NGK. This is because the thinner "bright nickel" plating on the NGK is more porous. The carbon gets ij when these plugs are about 600°F or more....and will not come back out.

But....other than being a little harder to clean....its no effect on performance.

And yes....you can gap these plugs. You just need to have either a Bosch gapping tool or a wire ring type tool.....and....you MUST gap all three electrodes....EXACTLY alike. If not the smallest gap will be the one that sparks most of the time.

The Bosch gapping tool
https://www.amazon.com/Bosch-W0133-1635001-Spark-Plug-Gauge/dp/B001IB2O2M

The wire ring tool. The Bosch tool works much better though.
https://www.amazon.com/CTA-Tools-3238-Spark-Gauge/dp/B00PISL328

Ray

Oh....and by the way.....ALL plugs on ALL type 4 heads except for the 2.0 914 head....are the same angle....and enter the combustion chamber ndarly horizontally.....BELOW the cylinder seating area....by nearly 1/8". So unless you are running domed pistons...which I am.....AND you have flycut like .080" out of your heads.....and/or your piston is domed AND protruding from the bore by maybe .080".....there is never any worry of any piston interference from a stock length plug with any kind of nose.

Thu Jul 19, 2018 5:12 pm

Ray to the rescue with his photos :) Tim - TCash make a sticky or something on this thread. Someone is going to want those photos and ask these questions again.

Thu Jul 19, 2018 5:15 pm

SGKent wrote: Ray to the rescue with his photos :) Tim - TCash make a sticky or something on this thread. Someone is going to want those photos and ask these questions again.

The fun part is that....I am on the road...and at a customer with no internet access....so the pics came from my jump drive....resized in my laptop and sent via my phone!
:lol:
Ray

Thu Jul 19, 2018 5:38 pm

My heads were flycut .5mm. I seem to be in the clear with these new plugs. Thanks for the info.

Thu Sep 13, 2018 3:22 pm

ivwshane wrote: Well f@ck! This is what I'm using and there is no way I bought these on my own without researching them. Where did I get the idea to use these? As far as I know I haven't had any issues with them. Unfortunately, I have no idea what my engine consists of.

Ratwell says to avoid these types but does recommend the NGK B6ES if you can't find the Bosch w7cc or w8cc.

The NGK B5ES is the equivalent of the W8CC. Preferred over the B6ES equiv of the W7CC.

Just pulled the B5ES plugs on mine today after haven been in service for ~17K miles. The gap grew from .028 to .030. I had installed them in July 2014.

Plugs looked great otherwise. Re-gaped them to .024 applied a dab of copper seize and back in. Running them with an SVDA, Pertronix 40K coil, Pertronix module, Bosch wires, rotor and cap.

Fri Sep 21, 2018 9:11 am

Ray - (or anyone else!) - will the BP6ET plugs work well with an MSD 6 CDI box?

Sat Sep 22, 2018 7:11 am

Yes, I have been running these plugs for years.....even in my 914 2.0L. :D