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Re: [T3] man am i tired...


On 28 Nov 2002, at 20:54, Keith Park wrote:

> I always thought that the cam issues with stock FI was the lift... as it
> caused a pulsiness  (Is that a word?)  to the vacuum which therefore would
> confuse the pressure sensor... but I could be wrong... havent messed with
> this yet

I doubt if the "pulsiness" would be a problem; I think the PS is pretty well 
decoupled from the high frequency pressure variations. If there really IS a 
problem, it would be because changing how the heads breath chenges the 
pressure drop between the IAD and the combustion chamber and the FI was 
designed for the stock configuration. In my opinion, any problem would just 
be one of calibration and curve fitting.

You could get the FI back into approximate calibration by upping the fuel 
pressure, but getting everything right would be a MAJOR research project 
which might also require turning a new spindle for the PS as well as 
changing component values in the brain.

I don't know anyone who has the resources to do this completely right, but 
it's possible that a few simple changes would give some very good results.

-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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