Quote:
Originally Posted by volkdent
How do you think this one will stack up against your current one for lag?
Jason
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Ah, yes, good question, which I wonder myself also. Actually, I would ideally have wanted the GT3071R for even a little lesser lag, but this one came along..
Kulein: the former IHI VF34 had ball bearings also! Theoretically spool should be (much) later, but in reality I think it will not make that much of a difference. A little later spool is not neccessarily a bad thing! I actually like spool to be a little later so your not on (back)pressure all the time on the highway and overall back pressure (=high EGT) is less.
About 1 bar boost (14.5 psi) at 3800-ish rpm would be excellent for me. Right now I had 1 bar at 3300/3400 rpm in 4th. The old turbo had a nicer (for me personally that is) spool on the 2 liter.
Purely track driving, spool of the VF34 was better on the 2,2 I think. In 3rd coming out of a corner at 3000-3200 rpm, spool came in really nicely an drelatively gentle. That last thing is cam and tune (wastegate ecu control) dependant as well of course.