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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Exhaust size
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Mon, 10 November 2003 16:51
 
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| strober wrote on Tue, 11 November 2003 00:04 |
dont you lose power in the low rev range from lack of exhaust back pressure?
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if you have a cam with large overlap, then back pressure will help stop the fresh charge from blowing out the exhaust// but it's a pretty poor way to go about it.. choosign a better cam to begin with might help..
i think this urban myth probably started with good ol V8 boys, who, after choosing race spec cams, found that they got more torque in the lower rev range with a smaller exhaust.. of course if they could rev past 5000, they'd probably have found where the motor came 'on cam'
problem of backpressure helping a long overlap cam, is that by the time it is on-cam, the exhuats wil be terribly restrictive...
chhose a cam correctly and you don't need backpressure (except for reducing noise)
Cya, Stewart
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| | Subject | Poster | Date |
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Exhaust size
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Dnation | Sat, 08 November 2003 15:05 |
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Re: Exhaust size
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T APLUS 22 | Sat, 08 November 2003 20:10 |
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Re: Exhaust size
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Rex_Kelway | Sun, 09 November 2003 01:57 |
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Re: Exhaust size
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draven | Sun, 09 November 2003 06:45 |
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Re: Exhaust size
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finney | Sun, 09 November 2003 08:03 |
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Re: Exhaust size
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draven | Sun, 09 November 2003 09:28 |
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Re: Exhaust size
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Norbie | Sun, 09 November 2003 13:13 |
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Re: Exhaust size
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rockinrolla | Mon, 10 November 2003 12:12 |
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Re: Exhaust size
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strober | Mon, 10 November 2003 13:04 |
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Re: Exhaust size
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oldcorollas | Mon, 10 November 2003 16:51 |
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Re: Exhaust size
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draven | Mon, 10 November 2003 13:34 |
