njc.corp

450 cfm- hmm-

thats bbc flow figures-

LSX-PWR

By the time you know it there are going to be 500cfm heads out there. Who knows with a good head porter 20 or more cfm can come out of these heads.

gectek

iTrader: (2)

its the new GEN V bigishsmall block

njc.corp

possible- i think so in a couple of years to come

but thats going to be a hell of a engine and i would think some big rpms to use those cfm readings will be needed-

we also need to know how good the intake is going to be from edelbrock from these heads-

UGotBeaT

dont get caught up in all that junk...and btw theres already 500 cfm small block heads...take a look at GMs splayed valve head with 4.500 bore spacing

njc.corp

get caught up in all the what-cfm numbers-

i would rather talk about air speed and csa and learn something new-

i know one thing-cfm numbers sells head products-

i see it all day long-

it also comes down on who is doing heads and if they are honest or not-

UGotBeaT

your right, ive seen people waste an assload of money on cylinder heads just based on flow numbers and not this street stuff more like $6k + on a set of heads alone but either way thats a different matter.

JL ws-6

iTrader: (50)

I figure these heads, with the porting, titanium valves, triple solid roller springs and teh rocker arms, plus the port matched intake will be about 9500 bucks.

But, put that on a 440 ci lsx bottom end that you spend 15 grand on with a dry sump, billet crank, alum rods and the like, and you should be able to make enough power to run 8.50 n/a with a motor that was built to take a 400 hit of nitrous, and on the jug, it should be a 7 second setup.

Want to play, you're gonna pay.

ATVracr

iTrader: (5)

These may not be the best head for a big shot of N20.

JL ws-6

iTrader: (50)

Why, what are you seeing that you don't like? Take it to PM if needed.

Robin L

We are at that point now with heads 50 numbers less. As someone points out the numbers don't always equal horsepower. We have run 8.59 at 3150 pounds. The new heads should be good for a couple of tenths over that.

I don't see any reason those heads would not lke Nitrous. What am I missing here?


Robin

JL ws-6

iTrader: (50)

That was my question as well, why wouldn't they like nitrous?

I am aware that the flow #'s aren't everything, but I'd be hard pressed to think that these can't make better power then anything else out right now.

ATVracr

iTrader: (5)

Not saying they wont like it just that the tune ups could be tricky depending on how the valves are setup. Steep angles seem to be VERY timing sensitive.

With that said can someone send me a set to test.

JL ws-6

iTrader: (50)

Reduced valve angle does tend to need less timing yes, but I'm @ 21 degrees on a 150 hit and could go more as it is with an 11 degree head, tuneup is still safe, probably coudl get away with 24 and still be safe.

These will require a little less I agree, I think a car running a 600 hit will probably be at 2 or 3 degrees total timing, but if these flow like they do, 1000 hp should be possible n/a, and I don't think that anyone's gonna be trying to put enough nitrous to one of these and think that they can double that output.

A nitrous engine, for all intensive purposes is about maxed out doubling the n/a HP, I know that is a genaral statement, but I think it's relativly close in most cases (a 500 hp motor can take about 500 worth and that's it you can't put any more to it)

ATVracr

iTrader: (5)

We had 4* in mine on the 400 hit. (with some holes near 0*)

Next year I'm thinking we will be around 0 and some holes 2 or 3* ATDC

427

iTrader: (3)

With the shallow valve angle and canted design, the piston may get very fragile for nitrous use; someone will need to try it to find out!


Kurt

JL ws-6

iTrader: (50)

Either that, or use a 6 inch rod with a 3.9 stroke, so there's enough room to put a good bit of meat on the piston.

At least that's the route I was thinking of taking...

jasonsny

I gotta admit...I like your style.

Since the chambers are uncut, I'm sure a N20 specialist could craft the perfect nitrous chambers in this casting.

Richard@WCCH

iTrader: (3)

It looks like the nominal bore diameter using 2.200"/1.600" valves will be 4.00". It also appears this head has the flexability to support a variety of configurations.
I also like the cast water bosses near the deck under the exhaust ports. Controlling coolant flow especially in N2O applications will be important and having a boss to tap into will make it much easier to regulate.

Richard

njc.corp

Richard if i am not mistaken this head is design for the head porter?

it comes out raw?