An EFI/Turbo/knocking question

Roa, Greg Greg.Roa at Cinergy.COM
Fri May 17 14:40:36 EDT 2002


Alright, I must admit Mr. Gough's continued tale makes me jealous.   The
thought of having EFI and a turbo on my JT makes me giddy.
I do have a question though.  In the past, Javad and others have said
that the JT is ok for a low compression turbo, even with the stock
compression ratio.

Mike said that his car with the EFI and the turbo, is much stronger now,
running ~6psi, than it was while running 9psi.  Assuming that he is
making more power, does the car become more likely to knock at the same
boost level?  With the EFI, you would have more flow into the engine at
the same boost level due to the elimination of the AFM, right?  If so,
you would have more air and fuel entering the engine, and therefore, to
the engine it is similar to running more boost, correct?

So the main question is, what, if anything, would allow you to make more
power without knocking, with EFI?  Is it simply more accurate fueling,
so you avoid a lean condition, and therefore hopefully knock as well?

Sorry for the lengthy and complicated question.

Greg Roa
Cincinnati, OH
86' 4kcsq
93' 90 CS
83' 944



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