js_2000

I am just wondering why VTEC engagement point is set, from the factory, at 6000rpm. Everybody seems to have obtained gain lowering VTEC point.

Dont't tell me it's because of emission or fuel economy.. this has never been the purpose of this car!

Just curious... what's your thought?

Jorsher

Maybe for more "kick?"

Honda seems to have made changes to appease the average consumer. The average consumer would feel like the car is "faster" if VTEC crossover was at a higher RPM and had more of a kick than the gradual increase like in other Hondas. I'd hate to think Honda would do this on their flagship vehicle since they never did on previous ones, but I don't have another explanation.

Syn

It bothers me when I think about it because so much of this car is well-engineered and well-thought. It was purpose built from the ground up so you would think they'd have spent time on everything engine-related. I mean, they weren't *that* far off with stock hardware--you can only go down to about 5500-5600 (AP2) with stock cat in place--but there's still a huge difference there when it's so hard to keep the car in vtec on the 1-2 shift without being on the ball.

Do yourself a huge favor and get a Flashpro if you don't already have one.

j03yYunG

5.8k

bronxbomber252

No we dont... All stock S2k's switch at 6k. (or 5.8 if you want to be really precise) If yours is not switching until 6.5k there is something wrong.

Atb117

Syn speaks the truth. FlashPro is a great tool for all 06+ AP2s. The VTEC "kick" isn't really as noticeable when you set the engagement point back, but it does help even out the powerband a bit.

Jorsher

Yeah, it still just shocks me that Honda has ALWAYS picked the optimal VTEC crossover point, except in their flagship model.

I'm all... WTF?

Saki GT

Where do you people come from? And where are you getting this ridiculous information?

OP, its set at 6k for emmissions and fuel economy, sorry.

K1LL3R 1NS1D3

as the S still is a ULEV vehicale also. Ultra Low Emissions. Ive also heard rumors of vtec being raised to 6 due to regulations in Japan regarding engine/exhaust sound DB requirements at like 5k or 5.5k rpm

jelliotlevy

The reason that the VTEC crossover is set at 6000 rpm is that at essentially that rpm, the torque curve from the high lift cam crosses above the torque from the standard lift (i.e., low rpm) cam. Let us give the Honda engineers credit for being able to measure that crossover point for the Ap1. The torque from the standard lift cam is dropping at 6000, although that decline is fairly gradual from 5000 rpm onward, while the torque from the high lift cam is rising rapidly. I have seen the curves. There may be a bit more excitement factor, and noise factor, from placing the VTEC transition a bit lower rpm wise, but there should be no performance advantage.