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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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4age extractor relating to cam profile
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Tue, 26 October 2004 15:00
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I have heard many times that 4age extractors are good to 185HP or something like that.
but isnt the performance gained by matching up extractor length with cam profile or something like that?? I was told they have some relation.
My question is, would i gain more power by changing extractors after having higher profile cams in?? If not, why?
If it seems unclear to u, i cant figure out a better way to phrase my question
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 4age extractor relating to cam profile
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Tue, 26 October 2004 15:06
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certain duration cams work in a certain rpm range.
certain extractor lengths and diameters will enhance the removal of exhaust, and the ingress of air in the intake, again, in a certain rpm range.
matching the two is a good idea, otherwise you are wasting free powah.
Cya, Stewart
ps, the 185hp thing is abotut he ability of the extractors to flow gas, not necessarily abotu the tuning of the exhaust to a particular rpm range..
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 4age extractor relating to cam profile
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Tue, 26 October 2004 15:15
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| oldcorollas wrote on Wed, 27 October 2004 01:06 |
certain duration cams work in a certain rpm range.
certain extractor lengths and diameters will enhance the removal of exhaust, and the ingress of air in the intake, again, in a certain rpm range.
matching the two is a good idea, otherwise you are wasting free powah.
Cya, Stewart
ps, the 185hp thing is abotut he ability of the extractors to flow gas, not necessarily abotu the tuning of the exhaust to a particular rpm range..
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what do u mean by removal of exhaust?? Doesnt "exhaust" refer to the whole SYSTEM??
So what ur trying to say is changing the ext. will alter the rpm range??
sorry ur explanation is a little too technical for me. care to use easier english??
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Location:
Melbourne
Registered:
November 2003
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Re: 4age extractor relating to cam profile
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Wed, 27 October 2004 00:23
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Basically, bigger cams will make your engine have more power, but at a higher RPM. Same with extractors. Different length will give you gains at different RPMs.
So if you set your cam up to give peak power at 7000rpm for eg, then you want to get your extractors made to extract the exhaust most efficiently at 7000rpm. Add both those gains together = more power and a better power band.
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 4age extractor relating to cam profile
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Wed, 27 October 2004 05:53
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Do it iS worth changing 4age ext. afterall!!!
cool to know i dont need 185hp to feel gain frm extractors!!
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 4age extractor relating to cam profile
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Wed, 27 October 2004 05:56
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if i have 26X cam profile, would i benefit frm using a 20V extractor? since 20V have 250 cam profile as oposed to 240 on 16v.
Yes i know i have to change 20v flange to engine
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 4age extractor relating to cam profile
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Wed, 27 October 2004 14:24
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anybody??
i have 267.5 degree cam profile btw
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