is there anyway to make ur vtec kick in sooner? soory im a nub

 

go to the speedshop and ask them for a apexi v-afc its a little programmable module that hooks into your ecu. DOnt do it yourself have someone hook it up for you you know being that your a noob and all and get it well tuned and you should be straight. The rest is up to you bro.

 

thanks man

 

Buy a V-AFC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelude1897 &raquo;</TD></TR><TR><TD CLASS="quote">Buy a V-AFC </TD></TR></TABLE>

 

I wouldn't set it too low, it will not give you more HP. I would set the VTEC engagement a few hundred RPM from stock.

Honda engineers designed the motors to engage VTEC at a certain RPM to get the most power out of the engine and I wouldn't mess with it too much.

 

i have heard that 4800 is ideal. from lots and lots of people. 5200 is stock btw if you didnt know. at least for my car, 97 lude sh

 

anyone know whats stock on the 98 jdm h22?

 

The secondaries open up at at 4900 so having VTEC engaged before that is rather pointless b/c you need to have more air to make more power. And for those of you who don't know what secondaries do; they are butterflies in the IM that open up to allow more air in the chamber.

 

the best thing to do is have the car dyno'ed with the VTEC set rather high, to see the power curve your car is doing with the lower cam, and then go back and set the VTEC semi-low to get a better look at your higher lobe's power area. Then set the VTEC point where the lower and higher lobes meet

 

Remove the vacuum line from the secondaries and they will stay open all of the time. No one races under 3000-4000 rpms anyway

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nocturnal &raquo;</TD></TR><TR><TD CLASS="quote">Remove the vacuum line from the secondaries and they will stay open all of the time. No one races under 3000-4000 rpms anyway </TD></TR></TABLE>
You'll lose a **** load of low end torque.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RAB &raquo;</TD></TR><TR><TD CLASS="quote">
You'll lose a **** load of low end torque.</TD></TR></TABLE>

Actually, you may loose LOW end torque (like 1500-3000 rpms) but There is power to be made from about 4000 to 5000 rpms with the runners open vs closed. I have seen it done on the dyno. This is especially true if you have a vtec controller and turn the crossover point down. Once your motor reaches decent speed (about 3000 rpms) it has plenty of vacuum to pull air from all eight runners. If you are forced induction, it's the only way to go...


Now, I assume you have reasoning behind your reply, so I would like to hear what you've got... Alot of people are willing to loose minimal power from really low RPMs for little mid-range. I drove my car like this between the supercharger and the turbo, and personally, I couldn't tell a difference in low end.

 

4800 is the ideal spot for probably 99% of H22s with bolt-ons. i had mine dyno tuned and that's where it's set. we tried it at 5000 and it lost power.

 

Is there a difference between JDM and USDM h22s?

 

VTEC wise i think the 92-96 motors JDM and USDM have VTEC changeover sooner like 5000. the 97+ are 5200 rpm.

powerwise, JDM motors put down about the same hp to the wheels, but from my dyno run i put down 7 more lb/ft torque over a similary modded 99 H22 for a baseline run.

 

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

Actually, you may loose LOW end torque (like 1500-3000 rpms) but There is power to be made from about 4000 to 5000 rpms with the runners open vs closed. I have seen it done on the dyno. This is especially true if you have a vtec controller and turn the crossover point down. Once your motor reaches decent speed (about 3000 rpms) it has plenty of vacuum to pull air from all eight runners. If you are forced induction, it's the only way to go...


Now, I assume you have reasoning behind your reply, so I would like to hear what you've got... Alot of people are willing to loose minimal power from really low RPMs for little mid-range. I drove my car like this between the supercharger and the turbo, and personally, I couldn't tell a difference in low end. </TD></TR></TABLE>
Hmmmm interesing I actually never thought about the facit. And yes I meant 1000-3000 torque.