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oops, I guess I haven't woken up yet.
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Posted by Ubips (more from Ubips) on Thu, 30 May 2002 10:27:44 Share Post by Email
In Reply to: cams, Ubipa, Thu, 30 May 2002 09:09:02
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Switched 240 duration NA In cam for 85' 252dur unequal lobe In cam

Suggest either 88+turb 252dur equal lobe In cam w/ adj cam gear on existing ex cam.
Or 2.3 In cam / 85' ex cam combo. The idea is to reduce overlap and get power in the rpm band you desire. 2.3/85 combo has 246/246 duration w/ 23 degrees of overlap.

My basis for suggestion is b/c that pressure ratio is close to 1:1 for 2.0L w/ 9:1 using T3, guess what the pressure ratio would be for a 2.1 or 2.0L w/ 10:1 using a T25. You will end up w/ more exh manifold press than intake press so less overlap is needed. Duration is chosen on basis of how high you want to rev and where you want the horses.

posted by 4.40.36...

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