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T28 = T3
Posted by Alex (more from Alex) on Tue, 30 Apr 2002 23:50:50
In Reply to: T3 doesnt fit without mods, nickR, Tue, 30 Apr 2002 16:19:00
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The T28 is a T3 60-trim (or T3 Super-60, I can't remember). The T25 is a T3 45-trim, which is what you would find in a 2.3L 9000. A T3 40-trim is what you currently have, and a TD04 15T is what you would find in an Aero or Viggen. Your current 40-trim is probably capable of up to 20 PSI or so, but will taper down to about 13 PSI by redline. I can't give exact numbers or RPM's as I currently don't have access to all my information. I think the T25 (T3 45) would be capable of about 23 PSI, tapering down to about 15 PSI by redline, and the T28 (T3 60) would probably be capable of up to 28 PSI, tapering to about 23 by redline. Although these are all guesses, it's relatively easy to see that unless you plan on pushing serious boost, there's no reason to go to a big heavy T4 compressor. I would suggest using a T25 for 8-16 PSI, a T28 for 17-24 PSI, and a T3/T4 if you plan on pushing much over 24.
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