iVTEC WTF?
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Joined: Jan 2002
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Originally posted by Rdline1
the rsx runs 11:1 and the Si runs 9.8:1. the rsx actually has the vtec we're all used to at like 5800 rpm i think (rsx owners correct me if im wrong) but the Si only has a slight change over at like 2800 rpm that is not even noticeable. they designed the Si for fuel economy and not performance. u need the rsx head if u plan on making any kind of big power out of k series all-motor wise. the rsx head was definetly designed much better. plus the vtc is gonna open up a whole new level of performance cuz u can change the timing of the intake cam anywhere in the powerband. the toda spec a kit for the rsx motor makes 225 to the wheels. thats pretty tight all motor and it still has stock driveablility. just wait til someone builds a 12.5:1 compression 2.4 liter k series with a heavily ported rsx type r head and some toda c's. id bet they can get 300 to the wheels easy
the rsx runs 11:1 and the Si runs 9.8:1. the rsx actually has the vtec we're all used to at like 5800 rpm i think (rsx owners correct me if im wrong) but the Si only has a slight change over at like 2800 rpm that is not even noticeable. they designed the Si for fuel economy and not performance. u need the rsx head if u plan on making any kind of big power out of k series all-motor wise. the rsx head was definetly designed much better. plus the vtc is gonna open up a whole new level of performance cuz u can change the timing of the intake cam anywhere in the powerband. the toda spec a kit for the rsx motor makes 225 to the wheels. thats pretty tight all motor and it still has stock driveablility. just wait til someone builds a 12.5:1 compression 2.4 liter k series with a heavily ported rsx type r head and some toda c's. id bet they can get 300 to the wheels easy
actually the I-Vtec kicks in at 3200
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Hi Hi Hi?
Joined: May 2003
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i think its 2800 im not sure. i test drove a new si but i ended up gettin my crx instead. either way the vtc is the key in k series.
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Joined: Sep 2003
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There was an article in Sport compact car, I think, where they bought a new RSX-S and swapped the motor into a '02 Civic Si. They mentioned they had to drive it real easy to keep it out of Vtec range to bring it to a dealer and have the ECU re-programmed.
Redneck Proud
Joined: May 2003
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The why new i vtec works(besides on the rsx type-s) is a two rocker arm vtec, unlike the three rocker vtec on the past. both rocker arms follow their cam lobes with one being slightly bigger then the first. At 2800 rpm, both rocker arms lock toghter and follow the bigger one. I-VTEC also incorporates vairable valve timing.
Yes, i passed my honda test at work on the new vtec.
Yes, i passed my honda test at work on the new vtec.
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