BoostedxJ3rk

So... I would like to hear everyone's thoughts and opinions on Locking the OEM Cams in VTEC.

Here's my thought train... 1) Stock Cams are pretty beefy and locking in vtec gives a nice tone/lobe 2) I feel as though doing this would result in a loss in power at the low range of the powerband, say 3.5k and under, but would increase power from 3.5k-ish til the normal 6k engagement. 3) I dont know what the factory ECU would think and if it would throw any CELs.

Seems simple enough to do either by using solid pins instead of the spring pins, or by simply running a switch to the vtec solenoid sending power to it and causing vtec to engage whenever the switch is on.

Thoughts/Opinions, I havent done this but I'm willing to give it a shot in the name of science, if others are interested in the results like I am.

s2000Junky

It will idle like shit and suffer until about 3500rpm like you say, from 3500 to the stock engagement the car will run lean, becuase the ecu still thinks its in primary cam at those rpms. There is really no point in doing this considering the drawbacks, when you can just pick up a vafc neo to do the same thing without the drawbacks. You can throw on a simple adjustable fpr to increase fuel needed between 3500-6k mechanically to work with the new vtec engagement. Then lean out with the neo above 6k rpm to get a good afr across the entire rpm band.

BoostedxJ3rk

Ok Thanks, I understood it that time haha

wadzii

There is no advantage to locking the stock rockers, you only loose power below "vtec"

Now if you are replacing the rockers with lighter weight rockers then you will free up some power up top and gain a little rpm head room due to lighter valve train. But mostly its useless

zeroptzero

Buy some Toda VTEC Killer cams and all related hardware. Not something I would want to drive but it will do what you are asking about, for a few bucks.

Bliss

Sounds bad good luck on getting the car to idle at low rpm. VTEC is science moving forward. Maybe servo actuated valve motors would be a move forward.

Anyway, we have regular cams in most cars just buy one of those. All those carburetor muscle cars remember? All that blugh blugh blugh blugh and shaking at idle. I love that gotta re jet my carbs.

noodels

With after market ECU with dyno run they would have looked into Best results of vtec engagement and usually 4-5.5k rpm secondary lobe engagement.

windhund116

Interesting topic. Honda prolly designed that VTEC cam lobe for 5K+ use. My bet is the car wouldn't idle, at all, if that cam was engaged at idle. And may have even a weaker torque/HP band until you hit 5K.

IMO, to get the most performance out of the this engine --- just have to keep the car above 4-5K, as much as possible. It will not have the low-end grunt of a V-8, without heavy mods.

Anyone ever stuff a V-6 into this car? Like maybe an NSX engine?


3 liter, 252 HP @ 6,600 rpm; 210 ft-lb @ 5,300 rpm maybe more to some driver's liking.

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thomsbrain

This makes no sense. VTEC is already adjustable by most tuning systems. You can turn it on at any RPM you want. The point at which it has the best returns depends on your modifications but I'm not sure I've ever heard of anyone improving power with VTEC below 4,000 RPM. If you just just turned on all the time, you would get zero improvement over a properly tuned VTEC switchover and tons of drawbacks.

thomsbrain

Yes. It never really went anywhere. As you would imagine, it had essentially no performance improvements because it was heavier and had very little peak power benefit.