(not a road car)

i've seen people lock there vtec but would it not be better to just use a none vtec head with some big cams. i guess you will have less rotating mass in the topend ?

 

Vtec heads flow better.

 

can you not make the heads flow better

 

VTEC heads flow way better and the valve train is more high RPM stable etc... I used to have a ported LS head with a nice valve train package and thought I was doing all the good...Until I got a VTEC head. Night and day difference.

 

Plus vtec heads have bigger valves, best flow, and the rocker restric you to run big cams, you need mods to run big cams.

 

only reason i asked was ,i read on here that mark p used a none vtec head on there race car ,i msg him about it but they never replyed.
i dont know if its top secret mod or somthing like that , so thought id ask .

 

Money and time will get you places. For us regular people, vtec heads will do what we need them to do with simply upgrading spring and retainers(turbo).

If you try to use a non vtec head to safe money, it will be WAY more money to modify it and it will still flow the same or less? than a stock port vtec.


I've been looking for flow charts and can't find anything.

Found it. After porting and vj it flowed more than a stock pr3 with no manifold. And that's a P8r head with with the 33mm intake valves.

https://honda-tech.com/all-motor-nat...esult-2709206/

 

OP,

The comments were assuming you were discussing B series cylinder heads.

Marc P runs K series stuff and K series OE non vtec heads are a totally different ball game.

 

right .that could be we I got mixed up. I did msg him but he never replyed. I think it was a old thread I just found . so yeah your probably right.

 

k series you can use the k24a1 non vtec head and it will port exactly the same as a k20a2 head.

people thought you were talking about b series heads.

i have a k24a1 head on my 2.7 k.

the only advantage to this is the head is cheaper. afterkmarket rockers or oem vtec killer rockers can be used on either head.

 

i was talking about b series, the thread i read when he said he used a none vtec head was about a b20 none vtec race car.so i just thought he was talking about a b series.