can someone please tell me the FACTUAL stock vtec point on a y8.. factory spec.. (not vafc settings, not when your vtec light comes on, not when your cousins sisters boyfriend "feels" it kick in) not trying to be a dick.. but i need the EXACT rpm... that is is supposed to cross over... thanks:thumbup:

 

Copied from the Honda Car Owners Club...

I think to put it more clearly, the original Honda program for implementing the VTEC engagement is that it is actually variable depending on a few parameters. Most people assume the VTEC to kick in on lets say XXXX rpm, but the ECU (lets reference with a stock ECU that is) doesn't ALWAYS kick in at that XXXX rpm. The ECU can decide NOT to activate VTEC if it senses that there is not enough engine load to justify the high-cam usage. For example, a ITR P73 ECU engages VTEC at 5700RPM (never sooner) under heavy load conditions (ECU already running in open-loop aka power mode, ignores O2 sensor.) BUT, if the ECU doesn't sense a heavy load (ECU running in closed-loop mode aka "14.7 A/F" mode, ECU reads O2 sensor to determine 14.7), the VTEC will only kick in no later than 6200RPM. So depending on how you drive, the VTEC can kick in anywhere from 5700 to 6200rpm.

That seems to be the best explanation I've found.

Edit... Here's the link: http://hcoc.2u.com.my/vtecpoint.htm

 

yeah i follow that logic.. good post though..

i meant like MINIMUM vtec cross over point.. as described in that article.. i know its pretty low for a y-8.. pretty sure its below 5700.. thanks for the post though, it is good info

 

Off of Erick's Racing ECU Reprogramming...

P2P: 96-98 OBDII Civic EX Coupe

5600 rpm VTEC switchover
8000 rpm rev limit (or custom rev limit).
Optimized fuel & timing.
Speed limiter removed.

Again though, that's the max where it switches over to. No one wants to talk about minimums. I guess it's a pressure thing.

No prob. Glad to help.

 

that sounds like a reprograming package.. since 8000 rpms is not STOCK redline.. its cool.. lol i appreciate the effort.. i THINK i found the answer on honda-tech.. and that would be between 5200-5500

 

Lol. I tried. Yeah, I like to lurk there for the answers too. Chris(Youngstown) is my sn... should have a whopping dozen or so posts.

 

i know the crossover is around 5500 rpm on my car when im at WOT, don't know what it is when just driving normal, probably higher than 6000 rpm

 

One of my romeditors says it is at 5127. This is a stock P28 d16z6 (5-spd)rom. Sorry but that appears the best I can do.

-PHiZ

 

on the y8 it opens at 4800 with normal driving with WOT it opens at 5500.