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Jim2 Jim2 is offline
7.0:1 > 11.3:1
Join Date: Oct 2003
Location: Calgary
Posts: 1,878
Originally Posted by 930gt-40r View Post
Well on my application the 1.75" primaries helped out big time, but that is with a whole host of other modifications as well. The 1.625 primaries were striaght choking my motor up- but thats due to increased displacement, porting, and cams. I am not lying when I say that the car spools like 5-600 rpm faster on the same tune.
Kris, what's your displacement?

I'm turbo'ing a 993 3.6 and I'm looking at the factory heat exchanger primaries which appear way too small. You've go me thinking...

Back on topic:

Anyone question if Tippy's turbine is too big, something like an old Garrett "Q" wheel. This would explain the .81 AR housing yet bags of lag. Sized for an old school track car, 935 ish.
Old 08-10-2010, 08:17 PM
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