cnc nissan cylinder heads

[eccnc]

Just trying to find out the interest in cnc ported cylinder heads geared towards the import performance

I am currently working on a KA24DE program, and if that turns out to my liking i will move on to the SR RB and so on.

Any input from the community will be helpful because the programs take a long time to create, and i also have to make plates for each cylinder head.

thanks, Anthony

[cbcm2435]

i would buy a set as long as they were not insanely priced

[fliprayzin240sx]

Why start with the KA? I'd start with S13 SR20s first...

[eccnc]

well im not 100% on pricing yet bcause im still working on the program, but will all depend on what your motor needs from your cylinder head.

and the reason im starting with the ka head is because i have some lying around being lazy, and also im working on a ka-t enging for my buddy

[amberlys13]

Why start with the KA? I'd start with S13 SR20s first...
u dont need a sr20 cnc head sr flow extremly good compare to ka,so why not start with the ka first

[CleanAndLegit]

something to consider making is a sr20ve head! now that would be awesome

[[email protected]]

would be interested as well as i am pushing the stock DET head pretty hard and looking to build a head in the super near future

[godrifttoday]

Everyone is interested do the program and then maybe one person would buy

[NAIRB]

u dont need a sr20 cnc head sr flow extremly good compare to ka,so why not start with the ka first

actually thats incorrect. stock ka head flows better than a stock sr20de head, you can look up multiple cfm charts that prove it.


something to consider making is a sr20ve head! now that would be awesome

an id fucking love a cnc program for a ve head. ive seen someone hand port one that made close to 400cfm @ .550 on the intake. if you could get a program to replicate something even close to this youd have some serious ass sr20's rolling around.

[punxva]

i'm pretty sure nismo already sells these for the ka btw...

Nissan Motorsports CNC Ported Cylinder Head for KA24DE - 11041-KA24D - Nismo (http://www.nissanraceshop.com/product_info.php?products_id=332532)

[R33E8]

i'm pretty sure nismo already sells these for the ka btw...

Nissan Motorsports CNC Ported Cylinder Head for KA24DE - 11041-KA24D - Nismo (http://www.nissanraceshop.com/product_info.php?products_id=332532)

Yeah.. and who is going to pay 2800 for it?? not me...

Anyways, if you can do it for less than 1k and have flow results you can count me in... KA-T FTW!!!! it's better to start off with because the s13 and s14 cylinder heads are essentially identical for this purpose..

[eccnc]

started work on ka24de program today and made mounting plate
now its just alot of probing and programing, and cursing, and frustration..... so on and so on

the pricing is going to be no where near 2800
but i am leaning twards doing them in 3 stages to cover a range of budgets
the one i am most excited about is the stage 3 because i am planning to raise the exhaust runners, and by my measurements i might actually have to move the ex manifold studs up to match the runner exit

[fyneyoungstunna]

If you get to the vg30de let me know, and Im in. I got about 1,500 put away just to spend on stuff for my Z.

[Mitsubayati]

What are we looking at in terms of pricing what gets done for these stages?

[UNITEDMASTER]

IIRC MAZWORKS already has this for SR,im not sure about pricing.

[redhatchy92]

this really would be awesome to be able to get ka24de heads ported and polished with a flow chart with out every going to a machine shop. im in for the ka24de as long as its not a ridiculous price

[jr_ss]

u dont need a sr20 cnc head sr flow extremly good compare to ka,so why not start with the ka first

Unless it is a VE head, it flows like shit...

[cbcm2435]

IIRC MAZWORKS already has this for SR,im not sure about pricing.

mazworx only sells complete heads that have been ported, so they still cost around 4K, and i dont think they are cnc ported. will you also be able to do cnc combustion chambers?

[Skilz10179]

I'm interested...

[eccnc]

mazworx only sells complete heads that have been ported, so they still cost around 4K, and i dont think they are cnc ported. will you also be able to do cnc combustion chambers?

yea i can do chambers

[godzilla_753]

dunno if this is a pertinent question but I always wondered why the f20c's and evo 4g63's made so much power from factory, does it have to do with head flow as Ive been assuming? I know STOCK ENGINE (this means head as well), s2000s are putting down over 500 WHP, while EVO's are putting down over 300 wheel which puts em at close to 400 at the engine with stock turbos. Ive always thought SR's were a bit lackluster, at least in BPU form

[eccnc]

dunno if this is a pertinent question but I always wondered why the f20c's and evo 4g63's made so much power from factory, does it have to do with head flow as Ive been assuming? I know STOCK ENGINE (this means head as well), s2000s are putting down over 500 WHP, while EVO's are putting down over 300 wheel which puts em at close to 400 at the engine with stock turbos. Ive always thought SR's were a bit lackluster, at least in BPU form

the 4g63 is one of my fav 4 cyl engines and i have played with the heads alot on the flow bench, the stock head flows pretty well.

never messed with f20s thou

[UNITEDMASTER]

Sooo whats the price range your looking at for this service??

[eccnc]

Sooo whats the price range your looking at for this service??

bouncing it off the top of my head...... probably
stage 1= basic oversize, short side work & 3 ang. valve job around $600ish
stage 2= runner shaping, razor edge on divider, short side work, 7 angle cnc valve job & comustion chambers around $900ish
stage 3= all of stage 2 + raised exhaust runner, in which you will prob have to make custom headder. $ i have no idea yet because i will have to weld the floors on the exhaust. ill just have to finish one and let u guys know

oversize valves are no prob on either one

[vehicle336]

Being at least in the same state as you I'm pretty interested. Hopefully I'll be rebuilding my DE this winter, looking to probably max out an N/A setup for TT competition. I know there used to be a shop here in Durham that did PnP headwork on KA's, but I don't know if they're still in business.

I'd definitely like to see flow numbers before and after. Maybe post up some charts when it's all sorted?

[jr_ss]

dunno if this is a pertinent question but I always wondered why the f20c's and evo 4g63's made so much power from factory, does it have to do with head flow as Ive been assuming? I know STOCK ENGINE (this means head as well), s2000s are putting down over 500 WHP, while EVO's are putting down over 300 wheel which puts em at close to 400 at the engine with stock turbos. Ive always thought SR's were a bit lackluster, at least in BPU form

It's because their heads have far more advance design than the Sr's. F20 and 4g's heads flow deep into the 200CFM's and even into the low 300CFM's on their intake sides. Compare that to the DE/DET heads that only flow low 200CFM's on the intake side. The VE head is much closer to the F20/4g heads in stock form. Another key feature is the fact that their valves are almost vertical to the cylinder, making room for some serious lift and duration.

From my take on things and some research, I've found that the VE heads can get into the mid to high 300cfm's. Obviously, with any port work it takes a good knowledge of how heads flow and what it is going to be setup for. A turbo motor won't necessarily benefit as much as an NA head would with a crazy amount of work and vice versus.

I think the exhaust side of a head needs more work than the intake side on a turbo motor. Where as NA would most likely benefit more from intake. Either there are a lot of variables that go into making a good flowing head. Just porting the shit out of it, isn't the best way to go about it.

[eccnc]

Being at least in the same state as you I'm pretty interested. Hopefully I'll be rebuilding my DE this winter, looking to probably max out an N/A setup for TT competition. I know there used to be a shop here in Durham that did PnP headwork on KA's, but I don't know if they're still in business.

I'd definitely like to see flow numbers before and after. Maybe post up some charts when it's all sorted?

i will post charts when i am happy with them

[redhatchy92]

I think the exhaust side of a head needs more work than the intake side on a turbo motor. Where as NA would most likely benefit more from intake. Either there are a lot of variables that go into making a good flowing head. Just porting the shit out of it, isn't the best way to go about it.

speaking about the ka24de here. as far as i know the intake side does most for the work and benefits greatly with proper porting. the exhaust its a bit tricky because if ported too much exhaust gas velocity would probably decrease and there for making the bigger turbos harder to spool.

[25BajaOutlaw]

not sure if ill do paint or performance this winter but the stage 1 sounds like a hell of a good deal (numbers pending).

[Skilz10179]

bouncing it off the top of my head...... probably
stage 1= basic oversize, short side work & 3 ang. valve job around $600ish
stage 2= runner shaping, razor edge on divider, short side work, 7 angle cnc valve job & comustion chambers around $900ish
stage 3= all of stage 2 + raised exhaust runner, in which you will prob have to make custom headder. $ i have no idea yet because i will have to weld the floors on the exhaust. ill just have to finish one and let u guys know

oversize valves are no prob on either one

$300 is a pretty big price difference between stage 1 and stage 2. I could see if it were hand ported but after you have the programs writen they are the same amount of work as far as set up goes.

[ANDY black s13]

The $300 is not just the extra metal removed alone,its the time it takes to do the work,wear on the cutters and the machines used,the power the machine consumes all have to be factored into the equation,For quality work them prices are good,Be probably double here in the UK cost wise :(

[Skilz10179]

$900 for truely quality head work isn't bad. I'm not knockin the price tag really, just the difference between the two stages do to the operations using the same set up and just running a different program...

As for the wear on tooling, cast aluminum is as soft as it gets. Unless you're doing hundreds of heads you're not going to be wearing out tools. I've been a machinist for over 10 years, i'm speaking from experience.

[jimefam]

Wow I'd really appreciate the link to the near 400cfm sr20 head? I'm gonna say bs on that one. Also guys remember Cnc is nice and all but the initial head has got to be something proven cause I can port a head like shit and program it into a Cnc and that don't make it good. Another thing is you can't go strictly based off of cfm #'s as that only tells part of the story. That's why it's better to get a head from a shop with a proven car then one who looks good on the flow bench but hasn't proven to be effective. Btw 900 is a great price for a GOOD PNP job Cnc or by hand don't mean shit.

[eccnc]

Wow I'd really appreciate the link to the near 400cfm sr20 head? I'm gonna say bs on that one. Also guys remember Cnc is nice and all but the initial head has got to be something proven cause I can port a head like shit and program it into a Cnc and that don't make it good. Another thing is you can't go strictly based off of cfm #'s as that only tells part of the story. That's why it's better to get a head from a shop with a proven car then one who looks good on the flow bench but hasn't proven to be effective. Btw 900 is a great price for a GOOD PNP job Cnc or by hand don't mean shit.

you are correct about the copying a shit head into a program and coming out with pretty looking shit. thats why i am testing on our chassis dyno as well as the flow bench

[eccnc]

$300 is a pretty big price difference between stage 1 and stage 2. I could see if it were hand ported but after you have the programs writen they are the same amount of work as far as set up goes.

the main differences between the stage 1 and stage 2 are the 7 angle valve job, that has to be done on a seperate machine, and the cnc combustion chambers

no offense intended just trying to explain the price

[joeboo1]

Interested.......will you be working on the L motors for the 240z, 260z, and the 280z as well???