meheartmycivic

This topic was talked about alot and i am sorry. But i want to hear and read peoples opinions anyway.

I have a 2000 civic si.

Mods:
CTR cams
type r throttle body
type r header
type r intake manifold
straight pipe
greddy exhaust
aem intake
high compression
port polish head
stage one racing clutch with a 11lb flywheel
jdm p30 obd1 ecu
vtec controller

i just installed new stuff and lost low end torque. dont mind because it's not like i would race down with my low rpms. but my question is would should i set my vtec now? it was at 5700. i just recently dropped it to 5000. would that be good? or 5500. its probably something i should figure out myself by driving around with it im guessing. but help would be appreciated. thanks

djviet2000

get it tuned it will give you a good vtec set point.

robbys89

x2 air/fuel and i think ignition timing change over when vtec is engaged so setting a switch over point with your vtec controller isent goin to do much, it will make the sound but you wont get the speed gain

h22aCb7

you want to set the vtec engagement point where the low cam and high cam make the same amount of power on a dyno.

meheartmycivic

thanks everyone

Vindicator9000

^^^THIS^^^

Correct VTEC engagement usually shows little or no hump on a dyno... there may be a few HP drop or gain, but as a rule the curve should stay relatively smooth on most applications, often with a little wiggle right at engagement that can usually be gotten rid of by moving the point one way or the other.

A good rule of thumb is that If you have a noticible drop in power right after engagement on a dyno curve, then you have it set too early.

If you have a large jump in power right after engagement, then you have it set too late.

If tuned properly and vtec engagement is set right, there should be little or no drop or jump at engagement unless you're running some serious cams or a lot of mods that add highend power at the expense of lowend.

rick_rabies

500rpm...yes i said 500rpm..do it and post a video..pallllleeeeeasse

meheartmycivic

Well does anyone know the engagement for vtec for a jdm p30 and a pr3? One of them is going to be used. Thanks

Micha

The P30 I had before on a stock SIR II B16 vtec crossover was at 6000.