Well, i finally fixed my car and finally passed smog. Problems were bent exhaust valves, burnt piston rings. I replaced everything and put on ACT hdss clutch. I noticed that when i hit vtec (4500), theres a sudden surge in power. I thought it was kind of odd since the power band is suppose to be smooth, or is it? I never felt that sudden surge of power even before i bent my valves. Is this normal? The car also seem stronger than ever.

 

now, welcome to the VTEC world yupz, it's normal to "feel" and not just "hear" the VTEC.

 

Get your head P&P and you'll be able to hear and feel vtec kick in

 

I didnt get mine P&P to hear and feel the vtec, just make sure your engine is all warmed up.

 

vtec isn't really a huge SURGE in power. try getting in a rx7..then you will feel an insane "surge". with cams however, you will feel and hear a big difference.

 

I can also HEAR the vtec. It just seem a little odd that it just have a sudden surge in power. I also tried moving the vtec x-over and same result. When it hits vtec there was like a sudden 10 hp increase in a slit second. I also tried my friends stock gsr but his powerband is alot smoother. You cant even hear of feel the x-over at 4500. Oh by the way, my mods are DIY icebox, header, 2.25 custom exaust, and vtec controller. Thats about it. I also ran a 15.00 at the track when i barely got my car (3 yrs ago)

 

for unfortunate car owner like me, honda's vtec is the only engine I can afford...vtec is enough. we compared vtec engine vs not having it. plus, I dont think its appropriate to compare in-line to ROTARY.

 

haha...im an unfortunate car owner as well. and i kno well enough that there is no big surge in power...

 

how much does getting your head P&P usually run anyway --- just to be a little OT.

 

800 and up.

 

hahaha, I see no one posting "HUGE, BIG SURGE of power" but you. the original post says "SURGE." and I know I didnt say "BIG or HUGE SURGE"

 

LOL all i have to say is... i love vtec. driving below 4400 to me tho =

 

damn, when I drive regularly, I shift on 3k. lol

 

VTEC... thank you thank you thank you

 

haha me too

 

Same here, having a vtec and not using it is worthless. I love to keep it above 4k, that is what makes driving so much fun.

 

I believe if you feel a surge of power when switch cam profiles that means your car isn't tuned. VTEC is supposed to be a smooth transistion. Something is out of whack.

 

"I believe if you feel a surge of power when switch cam profiles that means your car isn't tuned. VTEC is supposed to be a smooth transistion. Something is out of whack."

Thats what i was thinking too. The thing is that i just pass smog and everything seems to be fine. Any ideas what could it be?

 

Passing smog has nothing to do with your car being in tune. Best thing is hit the dyno and look at your hp and torque curves.

 

I'm glad someone else actually realizes this.

You're not supposed to be able to "feel" the VTEC engagement - ideal power delivery is supposed to be linear. If you can feel it, that means you're having significant power losses on the low-RPM cam profiles just before the engagement point. What's so great about a power loss?

 

Yep, I agree.

Proper tuning with a VTEC engine involves setting the engagement point high and tuning with the low-RPM cam profiles, then setting the engagement point low and tuning with the high-RPM profiles. Then you set the engagement point at the location where the low-RPM and high-RPM curves cross. This will give you the best possible power/torque delivery, which is hopefully steady and linear.

 

i installed some itr cams in my gsr and vtec is waaay more pronounced..like it snaps ur head back...i dont like it actually cuz it feels like ther is no power until like 4k..does anyone have a suggestion on what i could do to make it more smooth?

 

HAHAHAHAHA riiiiiiiiiiite..i guess im gonna break my neck once i get the jun3 cams in


[Modified by ALLMOTORDC2, 9:09 PM 1/16/2003]

 

it feels that way because there IS no power on the low profile!

 

just ITR cams and it snaps your head back??? Haven't heard that before.