i went to get my car dynotuned (with air/fuel) at a speed shop the other day, they said that the only way to get more power out of the motor was to turn VTEC up to 5600 RPM. It did gain 11 HP this way, but it kills my 1/4 mile time? any ideas how to turn vtec back to 5k?? what are some different settings i can adjust?? also, when i shift, as the revs drop back below 5200, it hits vtec for a split second WHILE DECELERATING. WHAT THE HELL IS GOING ON??? THANKS GUYS!

 

bump

 

ok, check it out. u can set the vtec engagement point using the vafc. its under settings... wen it sez lo to hi, that is wen vtec kicks in, and hi to low, is wen it kicks out, lower ur hi to low to like 4800 rpm, so u never fall out of vtec, and i have my vtec set to kick in at 5300 rpm, and its not that bad on the quarter times, if u kno how to keep the revs up. i also had set the throttle point for the wide fuel map, to 55% and i increased the fuel flow 1% wen in wide throttle, and wen my vtec kicks in, it pulls. love it. best i cud do, just messin around with it, to poor to get dyno time...lol. but all engines are different.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AEMPrelude916 &raquo;</TD></TR><TR><TD CLASS="quote">ok, check it out. u can set the vtec engagement point using the vafc. its under settings... wen it sez lo to hi, that is wen vtec kicks in, and hi to low, is wen it kicks out, lower ur hi to low to like 4800 rpm, so u never fall out of vtec, and i have my vtec set to kick in at 5300 rpm, and its not that bad on the quarter times, if u kno how to keep the revs up. i also had set the throttle point for the wide fuel map, to 55% and i increased the fuel flow 1% wen in wide throttle, and wen my vtec kicks in, it pulls. love it. best i cud do, just messin around with it, to poor to get dyno time...lol. but all engines are different. </TD></TR></TABLE>

agreed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apgarabu &raquo;</TD></TR><TR><TD CLASS="quote">i went to get my car dynotuned (with air/fuel) at a speed shop the other day, they said that the only way to get more power out of the motor was to turn VTEC up to 5600 RPM. It did gain 11 HP this way, but it kills my 1/4 mile time? any ideas how to turn vtec back to 5k?? what are some different settings i can adjust?? also, when i shift, as the revs drop back below 5200, it hits vtec for a split second WHILE DECELERATING. WHAT THE HELL IS GOING ON??? THANKS GUYS!</TD></TR></TABLE>

Your speed shop guys are morons. The VTEC point has nothing to do with raising peak HP. You gained the 11HP from the fuel settings alone is all. However I would suggest NOT changing the point right now. If you lower it, chances are the speed shop has a fuel setting which is below your current point, and above what it should be. If you lower your VTEC engagement point then this fuel setting will be WAY lean because the High cam will be letting in more air than the Low cam was at that setting. Way unsafe for your motor.

I would see what RPM settings your fuel is being adjusted at near the VTEC crossover, what the lower point is, and then maybe bump it down halfway between your current point and the next lowest fuel setting.

Next time you can get dyno time in, do a run with the Lo-Hi setting set super low so your Hi cam engages much earlier than it normally would. Then do a run setting the Lo-Hi setting super High, run the motor up to about 6k and back off. The first run will show you what your Hi cam is doing in the powerband, the second will show you what your Low cam is doing in the powerband. Do an overlay of the two outputs and set the VTEC engagement point to where the lines cross. This should be extremely close to the best point assuming all of your fuel adjustment settings are a +/- 0 across the board. Re-adjust fuel settings and RPM points to smooth out the AFR as much as possible across the board, then do another few power pulls. I think you will be very happy with the results of this method.

Hope that helps, and if at all possible take in your track times that have comparable 60' times and bitch to that dyno shop. They won't do **** for you but at least you might feel better.

 

Your problem is VAFCII.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JakeIsCool &raquo;</TD></TR><TR><TD CLASS="quote">Your problem is VAFCII. </TD></TR></TABLE>

Why hate? Just because there are better options available doesn't mean that it is causing a problem. If you would READ his post you would notice that his problem has to do with the tuning done by the dyno shop not the VAFC II.

So if you would kindly pull your head out of your a$$ you would realize that he could have a standalone $3k unit and he would still be experiencing the same VTEC problems because: "Your tune is only as good as your tuner."; not as good as the equipment.

I think you need to use my avatar for a while...

 

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

Why hate? Just because there are better options available doesn't mean that it is causing a problem. If you would READ his post you would notice that his problem has to do with the tuning done by the dyno shop not the VAFC II.

So if you would kindly pull your head out of your a$$ you would realize that he could have a standalone $3k unit and he would still be experiencing the same VTEC problems because: "Your tune is only as good as your tuner."; not as good as the equipment.

I think you need to use my avatar for a while... </TD></TR></TABLE>

w3rd...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AEMPrelude916 &raquo;</TD></TR><TR><TD CLASS="quote">w3rd...</TD></TR></TABLE>
to your ******


Bump

 

thanks a lot guys. im gonna take these posts back into the tuner and have them retune it. I need to anyway, b/c it seems to run a little lean with the new Skunk2.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phat_Jax &raquo;</TD></TR><TR><TD CLASS="quote">Why hate? Just because there are better options available doesn't mean that it is causing a problem. If you would READ his post you would notice that his problem has to do with the tuning done by the dyno shop not the VAFC II.

So if you would kindly pull your head out of your a$$ you would realize that he could have a standalone $3k unit and he would still be experiencing the same VTEC problems because: "Your tune is only as good as your tuner."; not as good as the equipment.

I think you need to use my avatar for a while... </TD></TR></TABLE>

Who says you need standalone? 3k? Uberdata is basically free.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JakeIsCool &raquo;</TD></TR><TR><TD CLASS="quote">Who says you need standalone? 3k? Uberdata is basically free.</TD></TR></TABLE>

Are you really that short that the point went so far over your head?
I never said need, I said "he could have it, and he would STILL have the same problem"

For that matter, he could have uberdata, crome, hondata, neptune, etc...and it STILL WOULDN'T MATTER because he would have the same problem...is that clear enough for you?

 

right but you were implying that I was attributing the problem to the vafc being cheap hence the "3k$ standalone" you mentioned.

Arguing like this is rediculous. Lets move on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JakeIsCool &raquo;</TD></TR><TR><TD CLASS="quote">right but you were implying that I was attributing the problem to the vafc being cheap hence the "3k$ standalone" you mentioned.

Arguing like this is rediculous. Lets move on.</TD></TR></TABLE>

Agreed...

I see what you mean, I wasn't implying vafc = cheap, I was acknowledging that there are much better options...I think that's where we both agree!