Chevy 383 Stroker

[Joe Piche]

My ford pickup had the very same problem. It turned out to be a massive
vacuum leak.


----- Original Message -----
From: "Ken Richardson" <krichar at ns.sympatico.ca>
To: <diy_efi at diy-efi.org>
Sent: Friday, December 07, 2001 3:06 PM
Subject: Chevy 383 Stroker


> My Uncle has just built a 383 stroker for this '91 Camaro. The car use to
> have a 305 multi-port injected engine, speed density system. He installed
a
> high volume intake system, headers, cam, injectors, etc. I'm going to burn
> him a new EPROM for the ECM but I don't think what I'm going to send him
> will fix his immediate problem. The problem.... When the engine warms up
> (ie. closed loop) it will not idle very smooth at all, it surges as in
> almost stalls then revs to 2000 RPM. It just keeps oscillating back and
> forth. It did this with the 305 chip as well as a new 350 chip. A cold
> engine runs fine. Ideas?
>
> Now, I'm going to send him a chip calibrated for the new injectors and
> cylinder displacement. After that we're going to work with the oxygen
sensor
> to get the fuel mapping right. No problem, I can handle this, but I'm at a
> loss for the problem I mentioned above. Should I send him a calibration
with
> closed loop disabled? I would rather not run the engine this way.
>
> Anybody here work with a stroker before?
>
> Thanks
> Ken R.
>
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