feeling the vtec!

[h22lude]

Hey, ive been reading alot of threads bout vtec and people saying how they feel it or hear it. It seems somtime i think i feel it, but i thought it kicked at around 4000rpm in a 4th gen prelude vtec. IF any of you feel it like a little kick, what rpm? You dont have to be flooring it to feel the vtec kick in do you. Im worried somthings not working right, to day i was just trying to see if i could feel it, and i shifted 1 and 2 nd at 6000 somthing and 3rd 4th, 5th around 5000 i wasnt flooring it but i never really felt it kick in. so any commets on when it kicks in or if you feel somthing or a way i can check besides that vtec indicator light? thanks

[LudeDude72]

Hello again h22lude, well I haven't 'owned' a VTEC (my lude is the SI) but I have a friend who owns a RSX type S and let me tell you, once you hit 6000rpm all the way to 8000rpm, man do you feel/hear it. Even more so if you have a CAI. I would think on the VTEC lude it would be the same. Don't know at what rpm it kicks in though, but I thought most VTEC's kicked in around 6000rpm. Maybe someone else with a H22 could shed some light on this?

[del]

check your pm h22lude.

[h22lude]

Thank you both. im not understanding the red line to well on my car cause this book said dont redline cause i could throw a rod or somthing and others say you can rev all the way to 8000 like ludedude72s friends rsx. Is that safe cause i havent even reved 7000 i dont think, So can i safely go 8000? thanks

[LudeDude72]

Whats the redline on your tech for your H22? Is it 7000? 7500? 8000? As far as running it up to redline it should be ok as long as you don't go over that too many times. I have an auto tranny (soon to be swapped for a manual) and if I floor it, it will shift at redline everytime! Hell I floor it many times a day and haven't had any problems with my engine because of it. So as long as you don't go over your redline limit, don't worry about it, and have fun with your VTEC! Remember you have a high reving engine and you are only going to see its real power if you get the revs up there in the 'close to redline' range.

[del]

the redline's there for a reason, but the fuel cutoff is the real safety measure to keep you from overrevving and blowing up your engine. some people fuck with it and remove the fuel cutoff, but then they have built engines that can withstand those higher rpms. i would avoid hitting the fuel cut off as much as possible. though it's not so bad passing the redline when you need to. ideally, you actually want to go to about 7600-7700rpms (redline is 7400), just so when you shift, you stay within the vtec range.

[h22lude]

Thanks, out of curiosity how could i find out if the guy who had it before me messed with the fuel cut off. Should i just rev it as high as i can go and if the fuel cut off is working it will stop picking up speed when i hit a certain rpm? But thanks ill try al these tips bout the upper rpms, sorry for all my ignorance, but thanks for helping me.

[km23honda]

If u want to do it that way. The fuel cut off when just stop or what it would do is won't let u pass that rpm which really is not giving any more gas to the engine.

[monksie]

v-tec kicks in around 4800-5200 rpm and gives a good push. try driving lightly on the pedal then flooring it at 4800 rpm and you should feel a substantial kick. You can also hear it quite clearly with an aftermarket air filter if you can't hear it open up while standard.

[steveo_h22]

ok in a 4th and 5th gen h22a vtec it engages to high lift at around 5000 rpm and the redline is at 7200 rpm i believe

[del]

vtec crossover point is 5200rpms, redline is 7400. that's final.

[h22lude]

i think dell sounds right

[pikkagtr]

Originally Posted by h22lude

Hey, ive been reading alot of threads bout vtec and people saying how they feel it or hear it. It seems somtime i think i feel it, but i thought it kicked at around 4000rpm in a 4th gen prelude vtec. IF any of you feel it like a little kick, what rpm? You dont have to be flooring it to feel the vtec kick in do you. Im worried somthings not working right, to day i was just trying to see if i could feel it, and i shifted 1 and 2 nd at 6000 somthing and 3rd 4th, 5th around 5000 i wasnt flooring it but i never really felt it kick in. so any commets on when it kicks in or if you feel somthing or a way i can check besides that vtec indicator light? thanks

only when you are more than 50% WOT will VTEC engage
it's a pressure sensor and will not kick in if the gas islightly pressed
try driving 50mhp in 2nd and press gas slighty versus flooring it
should be a huge diff

[aznbluerag777]

like pikkagtr said, if you are on the gas slightly than you will not feel the vtec, perhaps it is engaged but not strong enough to feel " i could be wrong " BUT definately you will feel vtec if you floor it before the vtec crossover point. so if you want to feel a kick or test it, roll at around 2-3k rpm on 1st gear than floor it you should hear an obvious change in sound and power once you hit that point. its useless to floor it once you're past vtec crossover point to test because you would already be in vtec (high cam) and cant tell the difference from the low to high cam profile. For the 4th gen, vtec is at 5200 and 7400 redline. 5th gen is vtec at 5500 and 7500 redline. I usually shift at 8000 rpm to keep myself in the vtec powerband but i have a reprogammed ecu with a 4th gen vtec crossover,8500 redline and upgraded valves. Hope this helps

[strodda]

Originally Posted by aznbluerag777

like pikkagtr said, if you are on the gas slightly than you will not feel the vtec, perhaps it is engaged but not strong enough to feel " i could be wrong " BUT definately you will feel vtec if you floor it before the vtec crossover point. so if you want to feel a kick or test it, roll at around 2-3k rpm on 1st gear than floor it you should hear an obvious change in sound and power once you hit that point. its useless to floor it once you're past vtec crossover point to test because you would already be in vtec (high cam) and cant tell the difference from the low to high cam profile. For the 4th gen, vtec is at 5200 and 7400 redline. 5th gen is vtec at 5500 and 7500 redline. I usually shift at 8000 rpm to keep myself in the vtec powerband but i have a reprogammed ecu with a 4th gen vtec crossover,8500 redline and upgraded valves. Hope this helps

do you have stock springs still? that would be more important when it comes to revving over stock. and on a side note, if you have to rev to 8k to stay in vtec, you shift too slow.