Just something i was thinking about, which sets us appart from all the domestics out there. Been doing some reading on the subject, basically dohc does make a difference, because your engines breathing can be improved or adjusted for our needs... a question arises for me, our 7th gen accords have variable valve timing, this could change our torque and hp curves, how is this done? how do i mess with the valve timing to change my engines performance.... , if anyone has any idea or thoughts on the issue please fill us in... as this is a very interesting subject for everyone. Below is a website to better explain what is a dohc and a sohc, seems to me the only difference in the end is the double over head cam, or a single over head cam, since a sohc can just as easilly have a 4v/cyl as dohc's always have... so in the end a dohc is more efficient, how can we use this efficiency to modify the engine to make it more powerful?

http://www.datsuns.com/Tech/ohv_vs_ohc.htm

 

for a dohc engine, you can change the cam timing for each individual cam provided you have adjustable cam gears and larger aftermarket cams that would benefit from being adjusted.

 

typically by an aftermarket camshaft and/or a set of cam gears, and a lot of time on the dyno

- Nathan

 

I've heard people talk about advancing their timing. How is this done? I'm talking SOHC now, without adjustable cam gears(f22b1). Do you screw with the distributor to do this? Is it even worth it with a stock cam? I'm just curious, because I'm doing a head gasket on my 95 EX and I guess now would be the time to make any adjustments if they would provide gains. Thanks guys.

 

I think you're confusing valve timing with spark timing. You adjust valve timing with adjustable camshaft sprockets, which don't come factory stock anyway. Adjust spark timing by twisting the distributor (but not on OBD-2).

 

the problem with dohc that i've seen is you get high hp numbers but the torque is always lacking

it's always like 250hp and 180tq or something along those lines