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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Originally Posted by stup View Post
That is restrictive and unfortunately has quite a thin wall,,so not much chance of opening up in size(inside dimensions)

2.85" approx (72.5mm approx)
Thank you much!

Our cars seem to respond well to about a 60mm inducer. That is about 2.4". Most turbo of that size have and a minimum a 2.75" tube connection on them.

I suspect at some point we are asking the turbo to not only compress air but to suck it through the upstream restriction. Thus, boost on on side of the compressor wheel and vaccum on the other.

If someone could figure a way to put a vac gauge on that section and check it at peak HP it would probably yeald some very interesting results.

With this happening it should reduce the efficiency of the turbo significantly at some point.

Thus, the compressor maps for most turbos are not going to be very accurate in our situation.
Old 01-06-2010, 05:03 PM
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