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 Basic Intake and Exhaust Modification Guide, for normal aspirated cars v1.0

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R40s
post Feb 16 2006, 10:51 AM

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Kudos! thumbup.gif

But I hv a bit to say,

>>"custom made extractor made by some non-reputable company or by normal apek workshop. Those extractors are no more than factory standard, or might be worse."

not all customized extractors r bad, if we know the correct lengths for our car, we can get it custom made by Apek shops or if the "cap-yam" is duplicated with correct lengths.

>>"Muffler is more to cosmetic rather than performance. "

the muffler is part n parcel of the exhaust system that influence the engine performance. The fact that S-flow type give better low-end performance and better FC than Straight-flow type explains by itself.

This post has been edited by R40s: Feb 16 2006, 10:52 AM
R40s
post Feb 16 2006, 02:51 PM

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QUOTE(mADmAN @ Feb 16 2006, 11:52 AM)
@kev da man
simpler yes, but heatshields only reduces the amount of hot air being sucked in...

the way i stated will ensure ONLY cold air is being sucked in. or at least whatever the air temp is outside. time consuming? errr...depends on how elaborate u make the box. u could always use those chrome windscreen sunshade thingies to make a heatshield + airbox (2 in 1) with those hoses. as for how messy it is...depends on the car actually...placement of airfilter, where to direct the hose etc etc

@r40s
extractors is not only length bro...the bends counts as well...so does the size n god knows what other sh!t. cant really remember coz i read this online a few years ago when i was doing some research on it. hence the reason i say its the most sensitive part.
*
Bro, I agree wif ur custom airbox + cone/mushroom filter, shud be better than juz heat shield + open-pod. But u don't hv to make many hoses until the airbox look like an octopus tongue.gif

With proper calculation, estimate the net flow-area of the filter, u can provide one hose with about 1.5 times the filter's flow-area will do.

About the extractor, I'm not saying only the length matters, it also depend on how smooth the inner surface, and the bends are actually made to minimize resistance to flow n to accomodate all the fingers at equal lengths so as to produce equal flows through all the fingers. I hv seen some models hv curves available for estimating the optimum finger lengths. cool.gif


This post has been edited by R40s: Feb 16 2006, 02:53 PM
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