Fabricating adaptor for carb manifold

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Apr 21, 2001 | 01:49 PM

#51

Pablo

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Car: Turbo Buick

Engine: 3.8 V6

Quote:

Originally posted by Tas:
I would have bet money that the perfomer intake with a TBI adapter would have a "distribution / atomization issue." I spoken against this intake for TBI several times.

First off, hes using the 4 barrel projection
Secondly, you keep talking this business about tbi needing a manifold designed for TBI . Explain to me what should be changed on a carb manifold to be better suited to TBI.. what with the TBI doing a better job of atomizing the fuel as an average, id like to know.

Apr 21, 2001 | 02:20 PM

#52

Dan W

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From: Brevard Florida

Again, I misused the word distribution.

... I may also have jumped the gun by blameing the intake... there could be other things at work here

Apr 21, 2001 | 04:28 PM

#53

Tas

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ya I forgot he had the 4barrel. I still don't like that intake and any problems would just be worse with a 2 barrel TBI.

Quote:

quote by pablo:
First off, hes using the 4 barrel projection
Secondly, you keep talking this business about tbi needing a manifold designed for TBI . Explain to me what should be changed on a carb manifold to be better suited to TBI.. what with the TBI doing a better job of atomizing the fuel as an average, id like to know.

ahhh I'm not giving away all my secrets

I've told a few people my idea and everyone has seemed to like it

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

[This message has been edited by Tas (edited April 21, 2001).]

Apr 22, 2001 | 11:07 AM

#54

Pablo

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lol, please

Apr 22, 2001 | 01:08 PM

#55

Brent

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From: PA

Quote:

Originally posted by Dan W:
All the injectors are the same size...
Could it be this is a manifestation of running 4 injectors on 2 drivers? Maybe but why just one side? ...here are how the injectors are wired. I'll label the injectors by what driver they go to and then their position in the series circuit, either first or second.

LF D1/S1
LR D2/S2
RF D2/S1
RR D1/S1

If D1 ran RF and RR and D2 ran LF and LR, the driver might be suspect. In your case, I would think if D1 is weak, LF and RR would deliever less fuel, leaning both sides out not making one side rich.

Perhaps one injector is stronger or one is weaker?. Maybe it is a result of not enough drivers for the number of injectors.

Apr 22, 2001 | 08:59 PM

#56

FastBroker

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Sounds like normal Holley Projection injector problems to me... They have Terrible flow tolerances. Might want to swap them around to see if problem moves with them. Or send the injectors to a shop to flow test and clean them to see how well matched they are.

I have had ABSOLUTELY no problems with my carb Performer with adapter plate and 1-11/16" GM OEM tbi, fyi... But, I sent injectors in and they were off a little and palce sent me back two that were a little closer, <2% diff, I think...

My last encounter with a ProJection injector test was 8%+ difference between the two injectors on a 2D system... Ouch. If you had four injectors off that much and two low ones on one side, you could have problems, i guess.