I did a search, but nothing came up that have what I am looking for.

I have been playing around with the VAFC that I just purchase. I noticed that there are two air correction RPM setting, one for Hi CAM and one for Low CAM.

What I would like to know is for the Low CAM setting, is it have to be the RPM range before the VTEC kick in? (ie. if VTEC is set at 6000RPM, the Low CAM RPM have to be below 6000rpm?) And for the Hi CAM, is it have to be the RPM range after the VTEC kick in? (ie. From 6000rom to the rev limit?)

Or can I have the RPM range set from 1000-5000rpm for the Low CAM and 5500-9000rpm for the Hi CAM even the VTEC kick in at 6000rpm?

 

You mean Vtec crossover?

 

Yes, VTEC x-over or VTEC kick in, same thing to me.

 

Basically.....it has been said so many times before, do not tune anything on the VAFC before you dyno. Chances are, you will lose 10-20 whp if you play around the setting on a stock R. Don't bother tunning it until you have a full I/H/E bolt-on then tune it bit by bit on a dyno with experienced tuner...it's about tuning the a/f mixture, after it's done, then...do the the VTEC x-over accordingly. Each R behaves differently, there is no standard chart for you to tune according to the types of mods you have.

Also, NEVER set Hi-->Low less than 400rpm than your Low --> High. You will lose lots of power, you might "felt" faster because you hear VTEC kick in sooner, but it's just the sounds, it's actually really weak! For example, if you set Vtec engage at 5200rpm, then it's disengage should be no less than 4800rpm. Some with lots of mod actually set VTEC engagement higher at around 6000k. A good driver can keep in VTEC range during up shift even if it's at 6000RPM. Since in most form of racing, our car are fast only if constantly in VTEC range (except autox).

Save up for a dyno session.

 

I understand all that. But thank you anyways.
What I need to know is what RPM range to set in the Low CAM RPM and what RPM range to set in the Hi CAM RPM? And does the range have anything to do with what RPM the VTEC cross over is?

I will do dyno my car later this year, but I just want to learn how to use the VAFC well before I goto a dyno.

 

High Cam is the setting which VTEC kicks in, Low cam is when it kicks back out on decel/or cruising again. I read it in the instruction manual I DLed and printed.

 

I read that too, but I think the manual tried to tell you the difference between Low-Hi and Hi-Low.


What I want to know is that in the VAFC, you have two rpm range: Ne-P:Hvt and Ne-P:Lvt. So from what rpm to what rpm should I have in each of them? Is there anything to do with what is the rpm for the VTEC switch-over? Do I use the the VTEC switch-over RPM to separate the two? (ie. Ne-P:Hvt for RPM after VTEC switch-over and Ne-P:Lvt for before VTEC switch-over!! )

Anyone know the answer?


[Modified by EGtoR, 9:13 AM 1/19/2002]

 

TTT
Anyone know the answer?