well i have one myself (D16Z6) and i have heard different things about them, like people saying that there non v-tec or they are but there not really. i was wondering if anyone could clear this up. Like how does v-tec working in a SOHC cause i know in the DOHC they switch form low cam to high cam, so what i'm really asking is how does it working on the singles, Also how would a V-AFC controller work on them and engaging v-tec on them.....Thank you, sorry if i was confusing or asking a dumb question. This would be appreciated

 

your basics of how the vtec system works is a little off. the way it works is it doesnt switch cams. it is always using both cams. one is the intake cam and the other is the exhaust cam. in 16 valve cars there is 2 lobes per cam and in a vtec cam there is a xtra lobe. the third lobe is what is pushing the valves when the vtec kicks in. the third lobe being a more aggresive profile which throws more fuel and holds the exhaust valves open longer to remove the gases

 

thanks for educating me on that more...so how exactly does it work on a SOHC, so like i said people tell me that a single cam v-tec motor isnt v-tec...is that true or not. i'm just trying to figure out how the SOHC work if it has v-tec, cause i understand the DOHC v-tecs. How does the v-tec work in the singles.

 

its exactly the same, the only difference is that in dohc motors both intake and exaust cams have vtec. but in single cams only the intake lobes on the cam have the vtec lobe. so when vtec kicks in only the intake is affected.

 

in the words of the ladies man, that is correct

 

Oh okay thanks alot...so when i lower my v-tec on my V-AFC controller i will be able to tell, unlike people telling me theres no v-tec to lower or anything...so messing with it i can adjust v-tec? so if it just messes with the intake part, is it just pulling more air o what?

 

make sure you tune your VAFC at a dyno, or you might get it too lean or too rich and have the vtec engage when its not at its optimum point in the powerband.

 

well when they did my motor swap Evans honda in newport, TN they used a non v-tec ECU and wired my v-tec through a Autometer RPM activated module tomake v-tec work so i am in the process of finding the correct ECU cause i also hit rev-limiter at 6500rpms and and the autometer rpm box has a 3.0 chip in it to engage v-tec at 3000 rpms, so thats why i am goin to get a bigger chip for it till i can buy a new ECU to fix my problems. thank you

 

yea the adjustment to your vtec will basically be adjusting how much fuel is being thrown in when vtec kicks in. but u should use a dyno to tune otherwise u probably wont to much good. honda set up their vtec crossover points pretty well