Re: recent dyno slip on john williams car - Saab Performance Bulletin Board - Saabnet.com
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Re: recent dyno slip on john williams car
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Posted by John Williams [Email] (#1982) [Profile/Gallery] (more from John Williams) on Fri, 31 Mar 2006 14:17:00 Share Post by Email
In Reply to: Re: recent dyno slip on john williams car, AeroTim, Fri, 31 Mar 2006 13:07:26
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Yea, thats the thing I noticed too, the consistancy is great on the power and the a/f... These are the sae numbers from a mile high in Denver. There is some debate as to how much a turbo car loses at altitude. Every racer, tuner, dyno shop has told me even forced induction cars lose power up here, less dense air on the ic, less pressure up here, it was 24.46 instead of standard sea-level of 29.92. Jak has almost the same car, slightly smaller turbo and he put down 280whp uncorrected, so I would think my larger turbo and 2.5" piping from turbo to ic and ic to intake with Nick at GS's t5 throttle body elbow, would make around 290-295whp. That would be about a 15% power loss from sea-level. I hear the na cars up here lose from 20-27% depending on the day and temp and all that. I am not 100% sure about it because I have not dynod at sea-level, but the power feels great and it pulls very hard from 4-5700rpm. It comes on at 2500rpm, but does not pull hard until about 3200rpm, then at 4k it pulls even harder all the way to about 5700rpm. On the highway in 4th gear, I am running at 27psi on my gage and holding boost forever, I have to let off because I get scared.... Thanks for your help Jak and Nick,
John


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