I have a jdm honda integra 1996 SiR-G RHD from japan and the car is perfect. I've put a complete catback 2.5inch mandrel bent on the car and all of a sudden the vtec kicks in at 4500rpm. There is no cel on and the car runs strong, but the only thing I have noticed is that the vtec kicks in too early (4500 rpm) I have disconnected the ecu and connected it back, but it's still the same.
Can somebody tell me why is he doing that and how can I fix that?
Thanks.

 

uh, i believe vtec is always supposed to kick in at 4500 rpm on a stock gsr. Every stock ecu GSR i have ever driven, which is allot, has always kicked in at 4500 rpm, i think with the exhaust, your just able to hear it allot more and possibly feel it more. I wouldn't be worried.

 

thats where it is supposed to be, the secondary runners "iab"s open just before 6kish.

 

vtec 4500, secondary runners 5800-6000

 

I agree, 4500 is stock. You have nothing to worry about...

 

vtec doesnt kick at 4500 rpms thats the secdaries opening the earlyest vtech will open is 5000 on some of the p72 and p30 ecus most ar 55 or 5600 rpms

 

 

 

Do not post information that you do not know. The P72 ECU VTEC point is lower than most.

Stock P72 ECU VTEC is 4400 RPM. The IAB opens at ~5750 RPM.

 

x2 my cars the same way with a stock p72

 

 

word!

you just hear it more with the exhaust lol..

 

theres isnt isnt enought oil presure to kick vtec at 4500 rpms

 

i got a sir-g motor in mine and vtec drops at 4500 and then secondary at about 5300

 

followed by

Yes there is and it is 4400 RPM. Unlike you, what I am posting is a fact. There is no doubt, question, or ambiguity about this information.

 

^^X2, that is exactly correct. Redflare you shouldn't post misleading information of which you have no experience or knowlege about.

 

Why are you posting such Stupid information???

 

my fault hey i was wrong

 

this reply is not gonna help you, but how do you like the 2.5'' exhaust, have you seen nice gains compared to a 2.25'' exhaust or whatever you had

 

It was going to be plan as day to me he was posting BS...just the fact alone that he spelled VTEC with an H on the end in his first reply was enough to make me want to spit in his face.

 

LMAO

 

 

Every 94-01 gsr ive ever rode in vtec is at 4400 or 4500 whichever it is.

 

Dead thread is dead.