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Re: [Fot] Holley tuning

To: "'Rick Parent'" <>, <>
Subject: Re: [Fot] Holley tuning
From: "MadMarx" <>
Date: Fri, 26 Dec 2014 15:39:20 +0100
References: <> <8115D9C163CA4D87976942B775A1E299@GebruikerPC> <> <521B90FCD12F431CAFE677D853DC7146@GebruikerPC> <001301d02107$b524f450$1f6edcf0$@com> <>
Thread-index: AdAhFanEcsJ60qADTxe2BGFKEaGybAAAyH0Q
Hi Rick,

I tried that already  by accident.

When I had removed the floats to change the jets to a larger size (was 4x71
at RA last year and now it is 2x73 and 2x77) I left by accident the lever of
the rear secondary float disengaged, so I ran only with the front
accelerator pump.

The engine was running very lean at RA and also on the first race at Spa.
Now I have an AF between 13  13.5

It was no difference fellable with only one accelerator pump. And the
hesitation was still there.

Maybe changing the front one to a smaller size and leaving the rear as it



Von: Rick Parent []
Gesendet: Freitag, 26. Dezember 2014 15:10
An: MadMarx;
Betreff: Re: [Fot] Holley tuning

That,s an easy one,

You have way to much fuel for your little 215!!!!!

The easiest fix is to remove the secondary lever that has the pump cam on
it. Remove the phillips screw that is in the end of the secondary shaft, use
a flat blade screw driver and pry it off, problem solved! This is a common
fix, you will also notice your car will accelerate better every time you get
back on the gas hard, like while shifting or coming off a corner.

Hope this helps, Rick

On Friday, December 26, 2014 7:34 AM, MadMarx <

Hi Guys,

hope you survived the first part of the end of year party zone.

I have a question about Holley carbs.

While racing the TR8 on a few events I figured out that throttle blips on
down shifts cause a hesitation on the engine.
This makes it difficult to engage the clutch without locking the rear
If I step a little harder on the gas the engine is jumping too far up in
revs so the car is acceleration on the downshift, what I don't want in that
Acceleration is always great and smooth. Only when the engine comes down
from high revs and need a blip for down shift the hesitation comes.

What to do on the carb?
Making the accelerator squirt less or more?
It is a 4150 HP double pumper. The cam color is pink in position 1.
Injektor size is 31 or 34 which is not clearly readable.
Could also be that injector one is 31 and injector 2 is 34.

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