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Changing Turbo Performance Parameters

Old 04-28-2004, 08:11 AM
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Location: Bayou-self Louisiana
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Last post in turbo terminology..but it may get over looked so.......



OK here is my guess on changing Sizing to get a different response.( which we did with the T66) and seat of the pants feel no dyno yet ( with .96 it had 402whp 16psi).It comes on fast at 2500/3100

Please tell me if I am heading in the wrong direction.

T72 is what I am looking at...

The turbine comes in several sizes and as mentioned in the thread earlier it is 200rpm more lag than the T66.

Like a bike front/ rear sprocket , auto pully system , tire to hub diameter etc.,

By taking the turbine down from a 1.15 or.96 to the much smaller .70 or .84 wouldnt the exhaust spool this much faster? Then due too the sizzing being the same on the compressor the CFM would come that much sooner to be more usable at lower RPM. Now of course I would give up 450 @16 PSI at 7,500 RPM but I should have 200 HP at a much lower RPM (streeable/ usable RPM) range.

More get up and go through out the range so not as to be so peaky and then have the shifting befor the you really enjoy the power surge.

I assume this could help wih the torque down low also for running harder earlier in the rpm.
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