80tq EFI- VROOOM!

[JShadzi at aol.com]

Cool, keep us updated on the header, make an extra for me too, won't you?  =)

As far as plenium volume, I belive your 1.6l is more than adequate...3.3l is more than 1l bigger than all five of your cylinders put togther!  This would be required is all 5 of your cylinders were on the down stroke at the same time, but  realistically, only one cylinder is really inhaling strongly at a time.  A general rule of thumb is that your plenium should be equivalent to the size of 2 cylinders, 3 maximum.  Any bigger than this can result in reduced velociites and general overkill.  HTH, keep me updated.
Javad

In a message dated Thu, 3 May 2001  1:29:11 PM Eastern Daylight Time, Jörgen Karlsson <jorgen.m.karlsson at home.se> writes:

<< Hi,

I am already working on a new header, I think that this one is a bit to
stiff for the header bolts. I plan to have the new one finished when I
install the real turbo engine. This time it will be stainless steel and
mandrel bent to avoid as many welds as possible, the certified pressure
chamber tubes I used for this time are so unbelivably hard that you possibly
can't understand it. I think that thin walled stainless steel is a better
choice, I will also try to give in more room to move.

A new intake is also on the drawing table, I didn't think when I did this
one. I assumed that Audi had used some common sense when they decided on the
volume of the plenum. I just made it 50% bigger because I know that all
manufacturers make to small plenums, when it was finished I checked the
volume, 1.6 liters. 3.3 liters are considered a minimum for a well working
plenum... I at least hope that I will get better distribution then in the
stock intake, I also have something Audi didn't have, I have a compensation
map for every cylinder...

Jörgen


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