Hi everyone. I have a question about the Vtec on my D16z6 engine.

When I accelerate, I dont hear the v-tec open up like on the 2000 civic si's. my friend's 2000 makes a lower pitched rev noise up to when the vtec opens, then you can clearly hear the higher pitched whine of the vtech above 5,600rpm or whatever it is. On mine, there is no volume or pitch change as you climb the rpm scale to 6,000. Is that normal?

On another friend's rsx type-s, you can really hear the vtec open.

Is it possible that something could be wrong with the vtec where the timing doesnt change?

Thanks in advance for the help!

 

thats normal d series vtec u cant hear it and b series u can hear it alot better

 

is your d16 stock? I suggest, I/H/E, and you might be able to hear the cross over, although..In my d16..I can't tell the difference..nor hear it.
In a sohc..its hard to notice Vtec.

 

dont waste u time & $$$ on headers and exhauast.. just get intake and u'll hear it around 4.5-5k i believe.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WongFeihung &raquo;</TD></TR><TR><TD CLASS="quote">is your d16 stock? I suggest, I/H/E, and you might be able to hear the cross over, although..In my d16..I can't tell the difference..nor hear it. </TD></TR></TABLE>

 

yes around 4500. i can hear mine, but maybe its my imagination

 

I already have the AEM cold air, SIR ecu with a Mugen xh4 chip, but not too much else. The chip lowers the Vtec to 4,400 rpm and raises the redline to 9,000. This is a true mugen chip, straight from japan, so I know that it is programmed right. It kinda bothers me not being able to hear the v-tec.

I cant feel that much gain at the crossover, so I dont really know whether its working or not.

 

diff engine design, yo

 

Is your engine stock? Just use the stock ECU that's not chip or disable the chip because I dont know why you would want the ECU to be dumping more fuel than u need... Maybe I'm missing something, but stick with stock ECU if you have no internal mods

One question... how much did you buy that chip for and did you get it off eBay???

 

on my d16z i could hear vtec and feel it, i only had a home depot intake
also that chip isnt gonna do anything for u untill u mod it and take it to the dyno, u might be lossing power instead of gaining

 

When I ordered the chip, I had to give mugen all the details of what I did with the car. I did that through a friend who could speak japanese. The asked what I'd be using the car for, and I told them Autocross. They said that then I would want the lower 4400 rpm vtec as well as more fuel under WOT when the Vtec was engaged. They explained that if you put 10% more fuel in during the Vtec cycle, using the setup I have, I should have a noticable increase in power.

Mods: AEM cold air, stage 2 proclutch, 6.5lb Flywheel (Advan)

 

BTW... I do notice an increase in power too. faster acceleration from 3200 to 6k.

 

its normal NOT to hear vtec on a SOHC engine.

not many Z6/y8's have an audible vtec crossover.

dont worry about it.

 

SOHC motors are deff. harder to tell... even my d16y8 with i/h/e I can only really hear a "clean" changeover in 2nd gear..

 

i have a d16y8 with intake an exhaust.. and i have no problem hearing v-tec engage at 5500 rpms.... your friend has a 2000 si you said.. b-series motors engagement is much louder.... cant wait to put in my b18c1 this spring!!!!

 

OK... So I am used to hearing my friend's B16 Vtec. It is abrupt and loud. On my D16, what should I listen for?

 

i could hear my z6 cross over in 1st but any other gear you could just hear a slight difference. now my b18c1, every gear you hear it.

 

My vtec sounds just like my wg opening, Actually i don't i've ever heard "vtec"...not even driving my buddies gs-r w/ I/H/E....it's over rated IMO...Although i can see it on my dyno chart

 

yea fawk VTECH, we dont need it! It stupid anyways! Just go buy yourself a d16 and swap off the head for a d15 or go buy a H22 and put on a H23 head!

 

I can't hear my vtec kick in but i can feel it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg6abuser &raquo;</TD></TR><TR><TD CLASS="quote">OK... So I am used to hearing my friend's B16 Vtec. It is abrupt and loud. On my D16, what should I listen for?</TD></TR></TABLE> you will hear the motor change over at 5500 rpms.. its heard the best in 2nd and 3rd in my car,, it will sounds like the motor is reving louder

 

Took my car out for a test spin again. This time I heard it... quite loudly. I figured out what it was.... Hehehe.... Anyhoo... it actually seems to vary when it kicks in. some times it is at the 4400, some times at 4800. I can really hear it now.

Thanks for all the help!!!

 

.......so what was it...?

 

I could not hear mine until I did full I/H/E. Now I can hear it, but just barley over the apex-i N1


Robert

 

Get a Comp Cam 59300..... you will definately notice the change over

 

Yeah so what was it?....