now that i've gotten more aquainted w/ my 02, i've noticed that the power delivery isn't as smooth as i thought it should be. Meaning that, when i do a pull say...from 3 or 4k rpms...it has pretty much no grunt @ the low end, which i expect. But w/ the car car you can actually feel the power band. Around 7k it starts to pull really hard, and puts you in the back of the seat. A few of the passengars in my car have noticed the same thing, and i'm just wondering is it really normal? i thought the power delivery was supposed to be almost linear because of how honda tuned the car...but it really doesn't seem to be the case.

 

ever looked at a dyno chart? or an explaination of VTEC? the engagement point is just south of where you are "feeling it" and thus, the reason for your lack of grunt at the low end. this is how the motor is designed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. Bagel &raquo;</TD></TR><TR><TD CLASS="quote">ever looked at a dyno chart? or an explaination of VTEC? the engagement point is just south of where you are "feeling it" and thus, the reason for your lack of grunt at the low end. this is how the motor is designed.</TD></TR></TABLE>

from your tone it seems that you think i dont know about vtec (if i'm wrong...sorry) ...and how it works. but believe me...i know how VTEC works, and the concept/idea behind the technology.

the engine has a cam that has basically two profiles with it, one designed to make maximum hp and torque in lower rpm. problem is, a short duration, low lift cam isn't going to make hp in the upper rpm range, which is when the camshaft switches to its 2nd profile, the high lift high duration cam...maximizing high output from the motor. in essence having two engines in one.

now...whether you're looking @ dynos of a b16b/b18c5, f20c, or c30/32 you'll find that their dynos deliver power in more of a linear fashion...power delivery which comes in an exponential leap in power, or a jump in 10 hp once VTEC kicks in...basically means that you need tuning. And w/ all of these motors, especially in the case of the f20, honda tuned them quite well. (just cuz i'm new to the s2000, doesn't mean that the scene is new to me. I'm no rookie by any means...)

now back to my question, w/out a dyno to actually graphically show how my motor is pulling, does anyone think that from my prior description this sounds about right? if it is...then it seems like the motor could benefit a lot (in the lower rpm) from some tuning.

 

I think... that it's all in your head. You have a 2.0L VTEC engine that revs to 9,000RPM. Why rev so high? Becasue a 2.0L isn't going to make much power @ 3500RPM because it's still on the "bitch" cam. You may not be a total newbie, but how many other DOHC VTEC cars have you had?

 

As long as you have done your basic maintenance and there's nothing wrong there, i think you've just gotten used to your car. It's only a 2.0 liter, vtec helps, but you still won't really have any low end.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RZFD &raquo;</TD></TR><TR><TD CLASS="quote">I think... that it's all in your head. You have a 2.0L VTEC engine that revs to 9,000RPM. Why rev so high? Becasue a 2.0L isn't going to make much power @ 3500RPM because it's still on the "bitch" cam. You may not be a total newbie, but how many other DOHC VTEC cars have you had?</TD></TR></TABLE>
i haven't had many...but i've driven a few @ GMR

crx w/ b16a....slight build 152hp, 112 tq to the wheels...i still miss it
93 lude - h22
95 gsr - b18c
98 ek hatch - b18c5
91 c30 nsx...that was kinda fun
but then a few other stock/close to stock cars....00 civic si etc

 

Actually the low RPM cam lobe is designed for fuel Economy not Max Low end power.. the Vtec lobe is your aggressive lobe

A lot of Vtec cars that go to a ALL-Motor will ditch vtec all together and just ride on cams with the aggressive lobe only

 

it's normal.. i always feel a kick when vtec engages.. lucky for me. i feel it at 6k. not 7k like you..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SimbaDogg &raquo;</TD></TR><TR><TD CLASS="quote">i haven't had many...but i've driven a few @ GMR

crx w/ b16a....slight build 152hp, 112 tq to the wheels...i still miss it
93 lude - h22
95 gsr - b18c
98 ek hatch - b18c5
91 c30 nsx...that was kinda fun
but then a few other stock/close to stock cars....00 civic si etc</TD></TR></TABLE>

You should be used to this by now.

 

get a dyno pull done by a reputable dyno guy. Otherwise, all discussion is moot

 

mine vtec point is 5700, i feel it at about 6.5k.

-Eric

 

mines at 4000

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RZFD &raquo;</TD></TR><TR><TD CLASS="quote">Becasue a 2.0L isn't going to make much power @ 3500RPM because it's still on the "bitch" cam.</TD></TR></TABLE>

Thats funny ****