I just bought a 94 civic EX sohc vtec and my friend has a gsr integra. When his vtec kicks in you can feel it pullin and hear it. Mine has a slight change in sound but doesn't pull anything like the Gsr. I know my car is alot less engine but is it possible that the vtec isn't engaging?

 

i doubt it, that is the same thing in mine i have an ex and my friend has a gsr and u can hear it much better in the gsr. I believe it has to do with ours being an SOHC and the gsr motor being the DOHC. What kind of mods does ur friend have? plus u have to incorporate the hp difference as well.



[Modified by jeddy0120, 6:08 PM 11/13/2002]

 

my friends only got a cold air and exhaust

 

I had an EX for a while, what you are experiencing is normal. It will pull slightly harder up top but you will barely be able to hear the VTEC engage.

 

cool thanx i was just wonderin

 

same with my friend and i cant believe the difference in pull from my car. The SOHC is different b/c in our car u have one cam that has to act when we are driving aggressive and just driving around town as apposed to 2 in the DOHC.
So if u get a new cam in a SOHC and u tune it too much u have problems idling, they tend to idle rough but with the DOHC they can have one aggressive cam and one cam for just reg driving.

 

The SOHC Vtec is 127 hp compared to the 170hp of the GSR which is DOHC.

 

would a new cam make a big difference in power?

 

Yes, its very noticeable. My buddy has a JG cam. The Vtec kicking in is more distinct and noticeable.

 

I would get a adjustable cam gear, it made a big difference on mine.

 

uhhh, no. DOHC still only has one cam for the intake side, that includes the normal and aggresive(VTEC) cam lobes. But, you are right about DOHC being hella better than SOHC, and I'm not one of the biased guys, I've owned both.
DOHC owns joO

 

What did you end up putting your timing at?

 

yeah it would u just have to tune it right!

 

Don't forget that the GSR has the dual butterfly system which also could cause a change in pitch. but yeah, there is definitely a difference when talking audible vtec between SOHC and DOHC.

 

COMPLETLEY POINTLESS on a SOHC motor.
dont waste the money.
the same thing can be accomplished with advancing/retarding the ignition timing.