Shaner Throttle Bodies
Drifting
Joined: Dec 2002
Posts: 1,970
Likes: 29
From: Berryville Virginia
St. Jude Donor '05-'06-'07-'08
I think they usually cut the back half of the TB blade shaft, which probably frees up a small amount of airflow (really small); and they smooth the airflow path by porting the body and "knife edging" the blade. Smooth air flows better than "bumpy" air, so it does have a positive impact. I think you are probably looking at 5HP for $150, and maybe a little better throttle response.
Last edited by Bud Gordon; Feb 28, 2007 at 08:25 AM.
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Melting Slicks
Joined: Jan 2004
Posts: 2,284
Likes: 3
From: NW Chicago, IL/Clearwater Beach, FL
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Mark does fantastic work. I was lucky enough to pick up one of his ported throttle bodies in the Parts for Sale section. It runs really smooth and throttle response is super! As all C5 and Z06 throttle bodies are identical, if anyone needs a core, I have an absolutely perfect, 2000, C5 stock throttle body I'd let go for $90.00, shipped. Then, when you get the ported Shaner back, just resell yours for what you paid for this one. No downtime and no $250 core charge. I have pictures if anyone's interested. 
Ed
Ed
Ed
