vtec not cracking hard

[alekp92jdm]

I have a h22a and when my vtec cracks at 5200 i can bairly feel it and i know its supposed to hit harder then what is is. What could cause this?

[SOHC-FTW]

You're not supposed to, vtec in stock form should be a smooth power transaction not a crack, kick or mmmmmmmmm baaaaWAAAAAAAAAAAA.

[alekp92jdm]

Ok well im pretty new to this and i was told that when you have a chipped ecu that it kicks hard and i know my ecu is chipped. So is it still smooth transistion

[deevergote]

"chipped" how? If it's not TUNED, then you could be doing damage.

VTEC isn't supposed to "crack". As said, it is supposed to be a smooth transition for the most effective powerband. Honda set the H22's crossover point a bit high at around 5200-5400 RPM so people would feel that kick and buy Preludes. It is not an ideal power curve. Setting it higher with your "chipped" ECU will make the kick more prominent... but it will also create one hell of a dead spot in the powerband before the crossover.

[alekp92jdm]

Ohhhh ok then i think mine kicks in at 5000 i was told 5200 when i got it but it looks sooner on the rpms cuz i can feel my car accelerate faster but iv heard people say it puts you back in your seat

[TracieS]

My vtec on my f20 is at 5000 its a nice smooth transition I like it were its at. But if you have mods to your car vtec will hit hard. But if you just have a I/H/E its still a stock engine.

[deevergote]

Ohhhh ok then i think mine kicks in at 5000 i was told 5200 when i got it but it looks sooner on the rpms cuz i can feel my car accelerate faster but iv heard people say it puts you back in your seat

Not really. Set at a the stock crossover point, you feel bit of a jolt, and you hear the change... but it's not a huge push.

[MortsAccord]

Its more an audible than it is physically felt thing. A SRI will make it quite noticeable when the cam profile changes as for sound.

Actually you'll fell more of a "push" difference in an ignition timing adjustment than when VTEC is activated. A good example(on my car at least) is during WOT acceleration from 2k-4k, theres a noticeable bump in the cars acceleration as it crosses over 2800 rpm's. Thats because it advances ignition timing a few degrees there(how much im not really sure) but I don't feel VTEC "kick in" in my accord(f22a1) or an In-laws S2000. Although the sound the engine makes changes a good bit.

As been said before it should be a smooth transistion, and aside from what you notice as sound goes you should not "feel" it push harder so much as it just continue to push hard untill almost redline. If you did infact feel it then the engaugement is not smooth and should be adjusted along with ignition timing so the car doesnt get surges of power, that causes small upsets in handling which is bad(handling wise). Personally I think some tuners will "tune" a car for a hard engaugement(with setting the point lower and adding a good bit of ignition advance at the same time) to give people the ilusion that they have a "better tune".

[deevergote]

Isn't 2800rpm around where the IAB opens as well?

[SOHC-FTW]

Think it's around 4-4.2k on the A6's. Did you mean b1 MortsAccord?

[dj_ender]

Think it's around 4-4.2k on the A6's. Did you mean b1 MortsAccord?

Yes, on the F22A6, IAB's open @ around 4K.

[MortsAccord]

Think it's around 4-4.2k on the A6's. Did you mean b1 MortsAccord?

Yea, on my f22b1 there's an ignition adjustment in the 2-3k area. I don't believe the b1 has iabs.