Originally Posted by raceface,Dec 27 2006, 12:17 AM

Hi, all. It's my first post here and I'm here because I've made the decision to trade in my EP3 Civic Type R for an early S2000. I have a specific question about the VTEC change-over in the S2000. I had a big problem with the EP3 in that is is too easy to drop out of VTEC when changing up a gear (even when leaving it 'till you hit the limiter) resulting in a nasty momentrary lag in torgue. I spent mega bucks on a re-map which did away with the problem brilliantly giving a smoother power curve. I'm just wondering if you guys have the same problem with your cars?

Cheers

Originally Posted by mugenrsx,Jan 4 2007, 08:47 PM

All VTEC Honda's have a powerband like this from the factory.

Originally Posted by sireousrex,Jan 4 2007, 07:59 PM

My car doesn't. Both AP1s I have owned have never dropped below 6k on an up shift at or near redline.

Originally Posted by mugenrsx,Jan 4 2007, 10:05 PM

Rephrased.

Originally Posted by Yflyer,Jan 2 2007, 06:19 PM

if you calculate the % change in gear ratio for each shift, then an AP2 drops out of VTEC on both the 1-2 and 2-3 shifts, assuming a VTEC transition at 6k.

Originally Posted by Yflyer,Jan 2 2007, 09:19 PM

if you calculate the % change in gear ratio for each shift, then an AP2 drops out of VTEC on both the 1-2 and 2-3 shifts, assuming a VTEC transition at 6k.

% RPM
1st gear 3.133 -- --
2nd gear 2.045 0.653 5222
3rd gear 1.481 0.724 5794
4th gear 1.161 0.784 6271
5th gear 0.942 0.811 6491
6th gear 0.763 0.810 6480

Edit: Gear ratios are from Honda's website

Example: the 1-2 shift drops the RPM by the ratio 2.045/3.133 = 0.653. That means an 8000 rpm shift will drop to 8000*0.653 = 5222 rpm. So you end up feeling a sag on that shift until the engine again reaches VTEC.