ludelvr

What could cause the the vtec to engage but not work properly? I mean, I can hear vtec engaging but when we look at the dyno chart, there is still no power increase. It looks like the power just peaks where vtec hits and then it just tapers down. My question is what could be wrong with the upper end like with the cams, valves, valve springs, retainers, etc? I am gonna go take a look at the vtec solenoid but that just simply enables the switch right? anyway, any thoughts would be awsome!!

preluder

is your car throwin any codes you may be in limp mode. your car can hit v-tec but its trying to let you know its in saftey mode so you dont blow anything until you fix ya whip bro.

b16ahybrid

if power is peaking at the cross-over point then your probably staying on the small cam lobes.

ludelvr

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16ahybrid &raquo;</TD></TR><TR><TD CLASS="quote">if power is peaking at the cross-over point then your probably staying on the small cam lobes.</TD></TR></TABLE>

well, this is on a turboed h22a and we've dynoed with and without vtec and on the small cams, yes, this is why the power drops off but even with the bigger vtec lobes on 7psi, it was still dropping very abruptly and the a/f's were really outta wack! Also, we could hear vtec engage but there was no power increase and it pretty much looked as if vtec was not engaged...but you could hear it and I've tested the solenoid and it is working. Another thing I wanted to ask is about the vtec solenoid. On the place that it mounts, on of the oil ports has like a swivel circular piece with a hole on it. You can move it manually, what is the point of this piece that moves around?

LiLOtaku

A freind of mine had a similar problem to yours. When he hit vtec in his, the car would bog or not pull to strong. Is your AF ratio going very lean?

In his case, he added a more fuel after the vtec engagement and it seems to be working much better now.

Good luck to ya mang

b16ahybrid

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludelvr &raquo;</TD></TR><TR><TD CLASS="quote">

the a/f's were really outta wack! ?</TD></TR></TABLE>

Fix that and it will help if not solve your problem.
When I swapped turbo's from a small t-3 to a larger t3t4 my car would bogg as soon as vtec engaged. Come to find out i was runing extreemly (10.0:1+) rich, So I leaned it out and viola the power came back. It felt as you describe, builds power up to vtec then levels/drops off from there. Get your air/fuel ratio's in check (I believe h22's like a little leaner mixture closer to 12.5:1 - 12.8:1 a/f). and see what happens.
Whats your air/fuel ratio at?