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udidwht
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Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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 Posted: Sat Nov 03, 2018 4:32 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Absolutely....
Even during steady pedal cruise watch the AFR and when the vacuum drops (inclined road/highway) the AFR will swing to the rich side. The distributor load senses.
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1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires |
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RailBoy
Samba Member
Joined: March 10, 2008
Posts: 2904
Location: Virginia
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| Posted: Sat Nov 03, 2018 5:47 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Now don't be over loading me and discombalating me, lol...
The Thread more or less came together in the last for post..lol
Yea, I simply just did not prior to this thread know how to Handle
and understand a Proper Set-Up of a 034 SVDA on a Stroker.
Thing is like what was covered in one of these threads is that indicated
in this post is that some say and believe that some cams simply do not
work. Which lead me down the wrong road in thinking..
But thanks to all of y'all for clearing this up.. RB
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[quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Sat Nov 03, 2018 7:33 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| 74 Thing wrote: |
There is an arrow on the anti pulse valve and it goes pointing to the direction of the vacuum so towards the carb.
You don't understand how it works. It will not over advance. You set the timing just like you set it with your 010 with the vacuum line disconnected to the distributor. Then you rev up the engine to full advance and set the full advance to the same timing you are using for your 010 (probably in the 28-32BTDC range). Then you hook up the vacuum line and you are done. Vacuum only kicks in under light load with the vacuum can pulls the vacuum advance plate and provides more degrees of advance. When there is no vacuum there is not additional vacuum advance timing being used just centrifugal. That's why I suggested running or even teeing in a vacuum line and run it to your drivers seat and place in a vacuum advance gauge and go for a drive. You will see the amount of vacuum that your engine is pulling and where. You will have zero vacuum at idle and when the throttle plate is open fully so at those times there will be no additional vacuum advance.
Now go hook it up |
IF I understand it, in essence with medium to high vacuum you have additional advance beyond lets say the 28-32 degrees set with vacuum line disconnected (full centrifugal), and when you open carb throttle plates and vacuum is lost, distributor actually retards back to centrifugal settings (operation)..... Correct?
Dale
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udidwht
Samba Member
Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Sat Nov 03, 2018 7:42 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| Dale M. wrote: |
| 74 Thing wrote: |
There is an arrow on the anti pulse valve and it goes pointing to the direction of the vacuum so towards the carb.
You don't understand how it works. It will not over advance. You set the timing just like you set it with your 010 with the vacuum line disconnected to the distributor. Then you rev up the engine to full advance and set the full advance to the same timing you are using for your 010 (probably in the 28-32BTDC range). Then you hook up the vacuum line and you are done. Vacuum only kicks in under light load with the vacuum can pulls the vacuum advance plate and provides more degrees of advance. When there is no vacuum there is not additional vacuum advance timing being used just centrifugal. That's why I suggested running or even teeing in a vacuum line and run it to your drivers seat and place in a vacuum advance gauge and go for a drive. You will see the amount of vacuum that your engine is pulling and where. You will have zero vacuum at idle and when the throttle plate is open fully so at those times there will be no additional vacuum advance.
Now go hook it up |
IF I understand it, in essence with medium to high vacuum you have additional advance beyond lets say the 28-32 degrees set with vacuum line disconnected (full centrifugal), and when you open carb throttle plates and vacuum is lost, distributor actually retards back to centrifugal settings (operation)..... Correct?
Dale |
Yep, the extra vac will fade as well even if you keep the pedal steady when you hit a hill/incline. As the RPM's/speed drops so will any additional vacuum advanced timing as the load on the engine increases.
_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires |
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RailBoy
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Joined: March 10, 2008
Posts: 2904
Location: Virginia
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| Posted: Sat Nov 03, 2018 12:49 pm Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Like the thoroughness of this Thread.
Took the Super a drive today with its 2180 and
Dual 40 DRLA's and 010, and was paying attention
to throttle response and RPMs while in the mountains
and straight aways..
RB
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[quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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RailBoy
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Location: Virginia
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| Posted: Tue Nov 06, 2018 1:20 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Ok, so here is a question were the SVDA may be better than a 010 off idle to lets say 2,800 RPMs?
Since you have vacuum actuating the distributor off idle when exxcelerating, it will come on stronger at low RPMs than that of an 010, thus more torque applied to the wheels?
I understand the 2,800 plus range in how neither will lets say advance past 30 degree if that is your max advance if timed there..
Sorry for he double post, just trying to simplify my question... RB
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[quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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74 Thing
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Posts: 7391
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| Posted: Tue Nov 06, 2018 9:25 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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It is based on load/vacuum. Did you run a hose from the carb up to your cockpit and drive and watch the vacuum as your throttle pedal moved. Go on the highway at about 3.5k or whatever and then lighten up on the pedal and watch the vacuum number increase.
Put on the SVDA already and see for yourself. As far as torque the one way to tell is put your car on a dyno then switch distributors and run it again. |
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[email protected]
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Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Tue Nov 06, 2018 10:59 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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or put the hose on and run it to the driver's seat, and put it on a SVDA you hold in your hand while driving. No cap/rotor, and watch the action of the vacuum.
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RailBoy
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Location: Virginia
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| Posted: Tue Nov 06, 2018 11:20 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Problem I have is work time on the car, it is 2 hours from me so been working on it on weekends. Long story, but had a trans to work on, then rebuild carbs, and now since car is running again figured I try out the 034 SVDA Myth. So have the 034 Sitting on my work bench for the next time I am near the car.
I was hoping to just get a yes/no answer on does the SVDA out-perform a 010 with an Engle 120 Cam in a Stroker..?
I am rather content with the 010, but was maybe opting to sell the 034 if I can't use it... RB
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[quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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j-dub
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Joined: November 09, 2003
Posts: 865
Location: Phoenix, AZ
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| Posted: Tue Nov 06, 2018 8:47 pm Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| RailBoy wrote: |
I was hoping to just get a yes/no answer on does the SVDA out-perform a 010 with an Engle 120 Cam in a Stroker..?
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I hope the take away that you got from these three threads is that yes, many of us believe the SVDA is better than a *insert name here* centrifugal only distributor for a car that is street driven. It should be noted that not all SVDA distributors are created equal as that is a general term. There could be room to further tweak it for your particular setup which we may know when you report back after trying it.
Good luck,
Jeremy
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RailBoy
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Location: Virginia
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| Posted: Tue Nov 06, 2018 8:55 pm Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Yea, it is the "Ramping Up" of a 034 SVDA compared to a 010 with an Engle 120 Cam from Off Idle to WOT that I seek is greater?
Yea, think I have this figured out, when the butterfly opens in throttling or going to WOT, the signal drops off for the butterfly is letting more air though, not pulling as much vacuum on the SVDA.
Hummmm... So, the SVDA is better at cruise, mpg wise. Which I can see.
So, the SVDA does not have an advantage over the 010 when the butterfly opens slow or fast.... RB
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[quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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Alstrup
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Joined: July 12, 2007
Posts: 7216
Location: Videbaek Denmark
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| Posted: Wed Nov 07, 2018 11:46 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| RailBoy wrote: |
I was hoping to just get a yes/no answer on does the SVDA out-perform a 010 with an Engle 120 Cam in a Stroker..?
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Answer: Every time, once you get the advance curve set up for your erngine. - One heads up. Some of the newer 034īs do not have the adjuster tabs at the advance weights. Those are to stay on the shelf in such cases since you will need the option of altering the advance, - and the spring tension too for that matter.
Also, the SVDA will have influence all the way up to when the carbs are not using the idle circuit at all, which typically means 36-3800 rpms depending on load (gearing, tyre friction and efficiency of engine)
T |
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RailBoy
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Location: Virginia
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| Posted: Thu Nov 08, 2018 3:50 pm Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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Looks like I am going to be doing like a 60+ mile drive on the car this coming weekend. All mountains and back roads. I will see whats up with the 010 and how it does then I guess do the same trip or type of tip again with the 034 SVDA. This is if the SVDA gets throw a 10 mile loop with out turning back? RB
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[quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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udidwht
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Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Fri Nov 09, 2018 3:37 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| RailBoy wrote: |
| Looks like I am going to be doing like a 60+ mile drive on the car this coming weekend. All mountains and back roads. I will see whats up with the 010 and how it does then I guess do the same trip or type of tip again with the 034 SVDA. This is if the SVDA gets throw a 10 mile loop with out turning back? RB |
You changing jetting for each run? (010 vs SVDA)
You should. No lean tuning with mechanical only distributor. With it you should be pretty much 13:0 -13:5 or so across the board.
_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7216
Location: Videbaek Denmark
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| Posted: Fri Nov 09, 2018 8:10 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| udidwht wrote: |
You should. No lean tuning with mechanical only distributor. With it you should be pretty much 13:0 -13:5 or so across the board. |
Why? |
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udidwht
Samba Member
Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Fri Nov 09, 2018 10:37 pm Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| Alstrup wrote: |
| udidwht wrote: |
You should. No lean tuning with mechanical only distributor. With it you should be pretty much 13:0 -13:5 or so across the board. |
Why? |
A lean mix (say 16-17+) will require added advance to burn correctly. This has been explained in the wideband thread. No lean tune cruising with mechanical only distributors.
_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires
Last edited by udidwht on Sat Nov 10, 2018 2:22 am; edited 1 time in total |
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Alstrup
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Location: Videbaek Denmark
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| Posted: Fri Nov 09, 2018 11:25 pm Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| Sure. But there is no reason whatsoever to let the engine run that rich on normal cruise. Up to 14,4 to 15 dependant on engine combo etc is fine. |
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udidwht
Samba Member
Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Sat Nov 10, 2018 2:18 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| Alstrup wrote: |
| Sure. But there is no reason whatsoever to let the engine run that rich on normal cruise. Up to 14,4 to 15 dependant on engine combo etc is fine. |
I avoid 14 - 15AFR at all times (no lingering there). Get above it on the progression and below it when on mains. 14:0 - 15:0 is where the hottest EGT's & CHT's are.
_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires |
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clonebug
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Joined: January 29, 2005
Posts: 4027
Location: NW Washington
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| Posted: Sat Nov 10, 2018 10:54 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| udidwht wrote: |
| Alstrup wrote: |
| Sure. But there is no reason whatsoever to let the engine run that rich on normal cruise. Up to 14,4 to 15 dependant on engine combo etc is fine. |
I avoid 14 - 15AFR at all times (no lingering there). Get above it on the progression and below it when on mains. 14:0 - 15:0 is where the hottest EGT's & CHT's are. |
Not according to my logs on my FI system.
Unless you consider 1100-1300* F too hot at cruise.
I run 14.5-15.1 AFR at cruise and have since I started EFI.
I don't like the way the throttle feels at anything leaner.
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Alstrup
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Location: Videbaek Denmark
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| Posted: Sat Nov 10, 2018 11:45 am Post subject: Re: Does a 034 SVDA Distributor Mix Well with a Engle 120 Cam? |
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| udidwht wrote: |
I avoid 14 - 15AFR at all times (no lingering there). Get above it on the progression and below it when on mains. 14:0 - 15:0 is where the hottest EGT's & CHT's are. |
I canīt copy that either, unless you are dead on 14,7 for a long time. But no carbed engine is that.
If the engine shows that, and its for real, you may have a mix quality - or an ignition problem.
T |
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