Port & Polished heads/intake mani ? (searched)

[stylepointzz]

I tried searching and looked through all of the pages, but couldnt really find my answer, even tho im sure its out there.

What kind of hp/tq gains would i be looking at on a SOHC with Ported and Polished heads? what are the advantages/disadvantges? what other mods would compliment this well?

thanks in advanced guys

[spank044]

Nissan engineered their manifolds and cylinder heads very well from early on when they were Datsun. I doubt you would see any gains on a stock to semi-stock engine. Hate to burst your bubble, but the most you should do is clean up some of the rough casting in the side walls and gasket/ port match the manifols and head to help with flow.

[stylepointzz]

i see, alright, thanks man

[sil80_chris]

Nissan engineered their manifolds and cylinder heads very well from early on when they were Datsun. I doubt you would see any gains on a stock to semi-stock engine. Hate to burst your bubble, but the most you should do is clean up some of the rough casting in the side walls and gasket/ port match the manifols and head to help with flow.

thanks for the info man too man i was gonna go ahead and do the same thing on my ka24de...

[Airmanspecial]

i agree with above, plus polishing is kinda usless if this car isnt being used on the track, it will just get covered up with carbon/soot soon after anyway

[stylepointzz]

yea that makes sence. thanks man

[DroptopDrifting]

heh, off topic but my ex is in state college she goes to penn state. when i was down there visiting we stopped at a pep boys and i saw something very nice sittin there cooling down via turbo timer..... you happen to know what i'm talkin about stylepointzz?

[stylepointzz]

heh, off topic but my ex is in state college she goes to penn state. when i was down there visiting we stopped at a pep boys and i saw something very nice sittin there cooling down via turbo timer..... you happen to know what i'm talkin about stylepointzz?

hmmm, was it a silver s13 hatch, with an sr20det?

hey next time you come down to state college, check out: driftpa.com

you should stop down at our oval!

[bonestock240sx]

this is kinda late but the exhaust side of the head is really restricted. once you get that opened up you got a decent gain. and it doesnt hurt at all. and if you plan on upgrading later you wont really have to do anything to the head. so all in all its a good investment

[DroptopDrifting]

it looks grey from where i was, it was dark. but it def sounded like an sr20and as far as the next time im down there, itll prob be next football season. my ex said shes getting season tix. i'll def check you guys out. i love takin road trips with the 240

[liquid_cool]

i agree with above, plus polishing is kinda usless if this car isnt being used on the track, it will just get covered up with carbon/soot soon after anyway

sorry bro..your a tad wrong here..on the exuast side its useless if its not on the track...but the intake side can benifit some from a polishing..allthou you wont be able get the full bennifits unless you built up the top end some..cams springs and such...having more air fly down your intake is allways a good thing...with a good polish on the inside of the runners "intake manny and head" could result in some gains of done rite.

[tero404]

dont mean to necro post but i agree with liquid_coolu can gain decent power from a port and polish and some more aggressive cams such as the dual exhuast (248/248) or a slightly more expensive (262/262) street performance cam. those can be run on some stock head parts. also note the drop in mpg.

[Nissan Junky]

So can you use dohc exhaust cam and put into a sohc head?

[spank044]

No. but you can get SOHC cams pretty cheap.

[tero404]

i think the single cam has 12 valves and the dual cam has 16. the ka24e therefore has more lobes on its cam then a ka24de's so it will not fit.

my advice if ur looking for power is to swap the single cam for a dual cam whether it be and SR, KA, or RB.

[spank044]

You can get a fair amount of power from the sohc, but you can't get as technical when it comes to cam timing, JWT Nismo and a few others also make performance cams. Plus you can get them for cheap and build them for a little less than a DOHC. They also respond to boost fairly well.

[stylepointzz]

it looks grey from where i was, it was dark. but it def sounded like an sr20and as far as the next time im down there, itll prob be next football season. my ex said shes getting season tix. i'll def check you guys out. i love takin road trips with the 240

yea i know who your talking about. we will be drifting for sure around football season so make sure you let me or someone know when your coming so we can set something up.

back on topic:

So i ended up getting a dohc, so im prob jus gonna swap that in, and have my sohc as a back up.

still not clear on what i can do as for puting another ex. cam in. is it jus slightly bigger? (im talking dohc now)