I'm considering using a non VTEC head with my first build. Are there any other advantages to this besides the lack of vtec wiring and easier valve adjustments? Can you run bigger cams with non VTEC heads? C'mon non vtec ppl, what's the appeal? Wider powerbands? More badonkadonk? Less fillers?

I've heard on here that the P8R head off of certain JDM b20s contain 33mm valves, which is bigger than the standard LS/B20 31mm, and that they can flow almost as well as a b16 head. Any truth to how well they flow?

I've made a thread planning out my engine build. Check it out. I want to do something totally different.
https://honda-tech.com/zerothread?id=1338098


Cliffs: What's good about going non VTEC? Most people on this forum are 'give me VTEC or give me death!'.

 

vtec > *

 

c'mon, i know we have some diehard nonvtecers here...

 

don't quote me on this but I believe you can run cams with larger lobes on a non VTEC, as in TODA's VTEC delete cams, which have a race profile that is always on, they also get rid of the lost motion assemblies which i think are the reasons why you can't fit a larger lobe. That would not work for what you want to do. If u want response and are gonna Auto X, use a smallish turbo and lower overlap cams to make good power from 2K-5K, instead of 7K+.

again correct me if I'm wrong but i think i'm right.

 

cool, thanks.

 

the v-tec heads are much better than the non v-tec heads. higher rpm, more horsepower, better airflow rate, more aftermarket parts availability, and the priveledge to a v-tec sticker on your car without having to lie or be a poser.

 

non v-tec heads generally have a little more torque in the lower rpm's but suffer bigtime on the
top end. if you want something for drag racing or track racing i would suggest
v-tec, but if youre looking for something that your gonna run hard at slower speeds and lower rpm's (like autocross) then the non v-tec MIGHT and i said MIGHT have a slight advantage. as for the ability to run a higher lift cam on the non v-tec, you must understand that you can only run mild aftermarket cams
on a stock head. if you wish to step up to full race cams, you will need a number of head modifications (including valvesprings and retainers) or you will risk valvefloat which will destroy an engine very quickly. you will probably need
major computer and engine mods for these cams to even work properly.
and i wont even go into the effects of what this would do to a daily driver.
lets put it this way, daily driver, and stage 3 cams dont go well together in the same sentence.

 

^^well yea. i'm not gonna run aftermarket cams with stock springs and retainers. that's just retarded.

anyone have some actual experience they can share?

 

the vtec heads have far superior flow. It all depends how much power u wanna make.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMB16A4ME &raquo;</TD></TR><TR><TD CLASS="quote">lets put it this way, daily driver, and stage 3 cams dont go well together in the same sentence.
</TD></TR></TABLE>
uh.. yeah they do. i have 404s (stage 3) in my semi built 2 liter nonvtec and i daily drive it everywhere. and i still get 28 mpg aroung town.

like someone said earlier, you get a bit more torque. of all the graphs ive overlayed with my friends vtec motors, i have more power til higher rpms (~6k) and then their power comes in. though my head is stock, if it was ported, it wouldnt be the same story

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
non v-tec heads generally have a little more torque in the lower rpm's but suffer bigtime on the top end... blah blah blah... don't know what I am talking about
</TD></TR></TABLE>

non-vtec heads tend to suffer on the top end (and its not "big time", look at some quality nonvtec builds) due to the often smaller intake valves. But look at what the poster is talking about, the P8R head with the same sized intake valves

Advantages? Price, from the head, to the cams/valvetrain, MUCH cheaper than vtec parts.

Disadvantages? Once you get to a certin cam profile, it gets harder to go much larger with out altering the rocker arms.

 

Thanks, I think I've decided on building up a nonvtec P8R head with the VTEC sized valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ^^whatnoobsearchthenGTFO &raquo;</TD></TR><TR><TD CLASS="quote">Thanks, I think I've decided on building up a nonvtec P8R head with the VTEC sized valves.</TD></TR></TABLE>
the P8R head already has vtec sized valves in it stock.

btw, i think im going to sell my P8R head