Okay I was wondering what rpm point should VTEC be adjusted to kick in at, H22 in a EG platform? It's set at 4500 and I think thats way too early. What about 5300 5400 rpm? Whats stock?

 

???

 

The B series is set at 5250 or 5252 from the factory. Please correct me if I am wrong. Not sure if the H series is any different according to VTEC. Did you do a search?

 

Yeah I did a search on VTEC engagement and the results weren't what I was looking for

 

hey I was searching around earlier for chipped ECUs for that platform and I came across a Skunk2 chipped ECU that has dual VTEC engagement. It says it pulls really strong. DO you guys think that 2 stage VTEC is good or is 1 stage VTEC better? I've heard alot of guys with the P72 switch out to the single stage ECU's like P30 or P73. I figured that one stage VTEC is better, although I may be wrong.

 

I'm not sure if i'm wrong or right correct me on this... but is dual stage vtec... when you have your throttle partialy pressed and then you give it more gas it engages later... and if you mash your throttle down it engages sooner

 

http://asia.vtec.net/spfeature/vtecimpl/vtec1.html

"In the first "stage" it controls the number of intake valves that open and close, first 1 valve is used at lower revs then both get used after. Then the second "stage" is when it switches to a different cam profile. Longer lift and duration, like regular vtec"

 

alright I just found the article I read it from in super street, it was hondata K-Pro ecu that changes VTEC engagment rpm

 

a stock usdm gsr engine hits vetc @5500rpm

 

my buddies gsr has a chipped p72 and his vtec engages at 4600

 

i will have to say that every car is different. finish what you want done to your car and get it dyno tuned. if you have some type of vtec controller or chipped ECU, the tuner should be able to set the vtec engagement at it's optimal setting

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ADVAN EG2 &raquo;</TD></TR><TR><TD CLASS="quote">i will have to say that every car is different. finish what you want done to your car and get it dyno tuned. if you have some type of vtec controller or chipped ECU, the tuner should be able to set the vtec engagement at it's optimal setting</TD></TR></TABLE>



Tuning is the ONLY true, exact way to see what is optimal and what is not. When it engages it may FEEL different but to be sure, you can do it properly with tuning

 

another thing to add is that you shouldn't feel a "KICK," as some would say, when you hit m4d vT4k. it should be a smooth transition.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blaze the chemi &raquo;</TD></TR><TR><TD CLASS="quote">The B series is set at 5250 or 5252 from the factory. Please correct me if I am wrong. </TD></TR></TABLE>

i think stock GSRs are crossing over at about 5500

 

stock gsr's with a p72 will switch vtec @ 4400rpm and open the secondaries at 5600rpm.

for an h22a in an eg, 4600-5000 would be good. my brother h22a eg uses the factory 5200 cross over, i think it would be better if it was lowered a few hundred rpm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ADVAN EG2 &raquo;</TD></TR><TR><TD CLASS="quote">another thing to add is that you shouldn't feel a "KICK," as some would say, when you hit m4d vT4k. it should be a smooth transition. </TD></TR></TABLE>

Yeah.. seriously why do people always say "my VTEC" isn't working... you don't feel a kick from it..... you feel a smooth transition just like ADVAN EG2 says!

 

Yeah you know I could never understand how people said that with supposedly VTEC kicking in. I've been in highly modded VTEC platform vehicles and the only way I've been able to tell when VTEC x-over is by listening to the RPM's. I thought it was just me for awhile or something.

 

If you can feel VTEC kick in it means it's set too high....as you climb low cam RPMs power plateaus and then maybe drops...then the switch to high cam results in an instant power increase....a lot of people set it this way with a VAFC or something...stupid as hell.

If you have a dyno you want VTEC to engage about 150-200 rpm where the horsepower and torque curves cross.

If you don't have a dyno...set VTEC at 5800....floor it til you feel it kick in.....set it 200 rpm lower...floor it til you feel it kick in.....keep stepping down 200 rpm until you don't feel it kick in anymore and that is a rough estimate of where it should be.

 

just like they said every car is diffrent but i kno b16 vtec likes to hit vtec around 4500-4800. a gs-r should hit 4700 rpm if you get a vtec controller i would let vtec hit around 4300-4400.

 

stock is 5200 for h22. unless you are falling out of vtec when you shift (you shouldn't on stock gear ratios), there is no reason to lower the crossover.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ADVAN EG2 &raquo;</TD></TR><TR><TD CLASS="quote">another thing to add is that you shouldn't feel a "KICK," as some would say, when you hit m4d vT4k. it should be a smooth transition. </TD></TR></TABLE>

very true

 

put the car on the dyno where the hp and the torque cross is about the best point

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95 RED CIVIC &raquo;</TD></TR><TR><TD CLASS="quote">just like they said every car is diffrent but i kno b16 vtec likes to hit vtec around 4500-4800. a gs-r should hit 4700 rpm if you get a vtec controller i would let vtec hit around 4300-4400.</TD></TR></TABLE>


Consider the fact that honda spent plenty of time and effort researching and engineering the b-series motors to perform on optimal levels, so with a stock setup i wouldn't change the vtec engagement at all. Unless your car is modified changing vtec to come on real early will not help, like they said dyno your car and find where the hp and torque cross, without the dyno you will just be guessing.