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  #21  
Old 04-30-2020, 08:08 PM
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Tom Vaught Tom Vaught is offline
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Why do you think Pontiacs have a different fuel curve?
No think about it, the fuel curves are different and were created by Holley Calibration Engineers for each specific OEM application. Generic calibrations were still calibrated for Street use or Performance use.

Same deal with EFI Engineers and their calibrations for vehicles be it cars trucks, Sea Level, or Denver.
If you never did the job, I can see where you would be in the dark on carb calibrations and EFI Calibrations.

Tom V.
This is not defending Dragncar, this is just posting the facts on Holley carbs.

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  #22  
Old 04-30-2020, 09:08 PM
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Originally Posted by Tom Vaught View Post
No think about it, the fuel curves are different and were created by Holley Calibration Engineers for each specific OEM application. Generic calibrations were still calibrated for Street use or Performance use.

Same deal with EFI Engineers and their calibrations for vehicles be it cars trucks, Sea Level, or Denver.
If you never did the job, I can see where you would be in the dark on carb calibrations and EFI Calibrations.

Tom V.
This is not defending Dragncar, this is just posting the facts on Holley carbs.
We are talking race carbs not OEM

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  #23  
Old 04-30-2020, 09:33 PM
Dragncar Dragncar is offline
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Why do you think Pontiacs have a different fuel curve?
Do you ever make a post without asking a question. never say anything.
Call CFM, he is a nice guy and if he has a moment might explain it to you.

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  #24  
Old 04-30-2020, 09:57 PM
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Do you ever make a post without asking a question. never say anything.
Call CFM, he is a nice guy and if he has a moment might explain it to you.
Lol i owned a cfm carb. He's been to the track and watched my car run and looked over his carb while it was on the car.

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  #25  
Old 04-30-2020, 10:30 PM
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Fwiw i've tested multiple carbs. The best one was one Dale did for a 590ish Ford. Worked great. The carb doesn't car what name is on the valve covers! It cares about the fuel used, the rpm/ci and the intake/plenum setup

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  #26  
Old 04-30-2020, 11:39 PM
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I had a 750 Dominator years ago and I sent it to Shaker455 (Jeff) here on this forum and he converted it from a 3 circuit to a two circuit as well as converted it to a 1050. I strongly recommend you shoot him a PM on your setup.

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  #27  
Old 04-30-2020, 11:47 PM
Dragncar Dragncar is offline
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Fwiw i've tested multiple carbs. The best one was one Dale did for a 590ish Ford. Worked great. The carb doesn't car what name is on the valve covers! It cares about the fuel used, the rpm/ci and the intake/plenum setup
So why are you asking me ? I know, its your game. You get me to make a post and lie and wait for any sort of mistake and want to say its "misinformation."
Pontiacs usually can take a larger cfm carb related to engine cid vs other makes. Tell me why?? Your turn.

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  #28  
Old 05-01-2020, 12:04 AM
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So why are you asking me ? I know, its your game. You get me to make a post and lie and wait for any sort of mistake and want to say its "misinformation."
Pontiacs usually can take a larger cfm carb related to engine cid vs other makes. Tell me why?? Your turn.
I haven't experienced that. Never heard a pontiac can take a larger carb. Can you give an example or reference something stating that? Based on my personal experience and discussing carbs with others that hasn't been the case that i can tell.
Not sure what your issue is with people asking questions is. You make a post stating something most people have info to back up their post and can answer questions regarding their posts.

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  #29  
Old 05-01-2020, 12:57 AM
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I run a Book carb.

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  #30  
Old 05-01-2020, 02:09 AM
Dragncar Dragncar is offline
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I haven't experienced that. Never heard a pontiac can take a larger carb. Can you give an example or reference something stating that? Based on my personal experience and discussing carbs with others that hasn't been the case that i can tell.
Not sure what your issue is with people asking questions is. You make a post stating something most people have info to back up their post and can answer questions regarding their posts.
Pontiacs are long stroke engines compared to say a BBC of the same cid. They pull harder through the carb. At least Dale explained it to me when I asked him about it.
Called him up getting info on the one I have. Its a 1400cfm and asked if it was crazy to try it on a dyno test with my 461. Was told it may or may not work well but shurly would run like crap at part throttle.
The engine I am doing now, I am told wants a good 1150 carb. Not sure if I want to spring for it bracket racing but might. I have a 1050 3 circuit I turned into a 2 circuit. The fellas at Performance Carb and Speed tell me its the one to run. A 1150 might show a few HP more on the dyno but the car will pull better, ET better with 1050. They tell me they can get more fuel through the mid range fo me. Knew about it when I asked.
I have heard stuff about higher end Pontiac NA guys leaning out and burning pistons until they got the carb right. More fuel in the mid range. At least that is they way I understand it.

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  #31  
Old 05-01-2020, 02:42 AM
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So what does anyone see for manifold vacuum? Either on the dyno or data logged during a run. Combination, rpm and carb size.

Stan

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  #32  
Old 05-01-2020, 09:25 AM
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I run a Book carb.
Will you share throttle size? 2.600?

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  #33  
Old 05-01-2020, 09:39 AM
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I run a Book carb.
THE END ..

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  #34  
Old 05-02-2020, 02:14 AM
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Will you share throttle size? 2.600?
2.800

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  #35  
Old 05-02-2020, 11:37 AM
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Will you share throttle size? 2.600?
My Book is 2.600 when you decide to get serious get Bob to build you a Carb.

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  #36  
Old 05-02-2020, 11:43 AM
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My Book is 2.600 when you decide to get serious get Bob to build you a Carb.
Im good thank you
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  #37  
Old 05-02-2020, 12:26 PM
73 TRANSAM 73 TRANSAM is offline
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Nice carb Slowbird! Good way to get the air and fuel straight to the ports.

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  #38  
Old 05-02-2020, 02:49 PM
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Im good thank you
Still slow lol

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  #39  
Old 05-02-2020, 05:30 PM
Dragncar Dragncar is offline
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Im good thank you
What intake is it sitting on ? It almost looks like the runners are not siamesed, separate ?

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  #40  
Old 05-02-2020, 06:41 PM
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Still slow lol
Didn't Slowbird's pump gas combination cover your best ET so far weighing like 400 lbs and spotting you a 300 shot??.... Lol

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