/4 2.0 throttle body "overbore"????, dyno proven improvment??? |
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/4 2.0 throttle body "overbore"????, dyno proven improvment??? |
Mueller |
Nov 3 2003, 12:42 AM
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#1
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
Anyone ever do back to back testing with stock and then a bore'd out throttle body??
stock dia: 45.10mm average overbore diameter??? I'm guessing 50mm, it looks like I could bore mine out to 53.50mm...hmmmm (IMG:style_emoticons/default/smile.gif) motor to have higher than stock compression, custom R.A.T. cam and Megasquirt...... |
Brad Roberts |
Nov 3 2003, 12:46 AM
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#2
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Yep. Mike Harris and I tested it on his HPH built BP 2.0 last year.
Worthless on a stock engine with racing header. I could see how it would be needed for a engine that requires MORE air. This is why I have Andy working on the actual engineering flow numbers for the stock intake. I want to know EXACTLY what numbers the factory had to determine the stock intake manifold and stock throttle body. B |
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