Best camshaft combo

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

I want to replace one of my camshafts with one from an earlier 240. Is this a good idea? My camshafts in my 95 240 seem tame. I want to gain some more low end and mid range torque. Will this help to obtain my goal?

Post by **Exar-Kun** » Sun Apr 13, 2003 10:14 am

grab two 1991 DOHC exhaust cam shafts. THose should dro in with some shim adjustment. dennis from unstable hybrids did that to his turbo KA..it will help a little.-chet

Post by **sixxdeuce** » Sun Apr 13, 2003 10:14 am

I think you would lose low and mid range torque with s13 cams. I always thought they made more top end power than the s14 cams. not sure though.

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Exar: Isn't one of the cams for intake the other for exhaust? I'm slightly confused.

Post by **C-Kwik** » Sun Apr 13, 2003 10:14 am

Normally, yes. But Nissan Motorsorts Repinned the exhaust cam and used it as an Intake Cam when they built a KA up for a Z prototype years ago. It's now a mod that yields more HP for the KA.

Post by **Exar-Kun** » Sun Apr 13, 2003 10:14 am

:withstup

exactly. THanks dori.-chet

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Sorry.

Post by **96_S14_SE** » Sun Apr 13, 2003 10:14 am

Bah to repinning... Im running 248 / 232 with a virgin exhaust cam, with no new holes punched

. I was running 240/248's but thought I would give a 248/232 a try so I put the exhaust cam on the intake side, and swapped in the stock 232.

Impressions: Well the 232-232 has about the most lowend of all the setups IIRC, its just that with a 232 intake it gets choked severely at the upper ranges. Sorry I cant rem specifics as its been 2yrs or so.

The s13 cams or 240-248 gained me a decent amount of upper and mid. Russ said he got 9rwhp from 5k+. I dont know what I got as I drive an auto and probably gained 2 rwhp hehe. Um for me the power was felt nicely at 4.5k+ with the cams and my mods... Another thing to note with a shorter burn time of the 248 the exhaust noise is increased over the 232.

Um 248/232 Is what I currently run, and have been for the past 2 or so weeks. Basically take the 248 exhaust cam, and while the car is at tdc, put it in so that the first lobe set face out, like the stock intake cam you need to pull does. To be specific rotate it and the sprocket CCW 4 teeth... If you are really interested in it I basically wrote out a step by step to someone on FA, so I could post that link... I like this setup, I didnt notice any real loss, but mabey a miniscule amount up top. Mid range is better and the power comes on at 4k vs 4.5k. Fuel economy increased slightly, and exhaust noise wile holding a steady pace at highway speeds is greatly reduced.

248/240: I may give this a try in the next week or two when I get bored. The reason why... I havent heard anyone try it yet and it should remake my engine legal for my class (gotta find out but more legal then now) Should push the upper range up more and drop the mid / low slightly. That is, from my 248/232 setup. It should offer more mid / low then the 240-248. Funny thing is that I will need to rotate this cam as well to work in the exhaust side. So Ill be running a stock set of s13 cams unpinned but swapped from each other..... Good times, miscounting and nearly killing my engine swapping the exhaust cam over (my best friend cant count, moral: always dbl check for yourself) wasnt enought so Ill give it a go with the 240

248/248: um gimmie a exhaust cam and Ill tell you. What I do know is that it produces the most peak hp of any stock cam combination. It gains about 6rwhp at 6k - 6.5k from the 248-232, but the 248/232 gaines 4 hp over the 248/248 from 2k-5k (another member of another board dyno'd and posted his results). The 248/248 is a better highway cam setup (drag), while the 248/232 (or 240/248 for that matter and possibly 248/240) is a better around town cam (soloII), where mid range is used and is fun. Also the 248-248 is the loudest setup, and has the least fuel economy.

That help any?

Oh and dennis posted in that post I talk of on FA.com.... Hes not running a repin either, but a rotated exhaust cam on the intake side, and a stock exhaust cam... 248/248

Post by **I am Technoman** » Sun Apr 13, 2003 10:14 am

I use the 248/248 setup and I am real happy! At 4k my KA comes alive and pulls all the way to 6K. I cant wait to turbo my engine and see what I get.

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Thanks guys for all the help.

Post by **Northern240** » Sun Apr 13, 2003 10:14 am

Since we are on the subject of cam. Does anyonw know where i can find a set of decent cam from s13?

Post by **ESPER** » Sun Apr 13, 2003 10:14 am

96_S$, wow i am interested in this mod and no nothing about it. basically what you are saying is get 2 exhaust camshafts from an s13 KA24DE and turn one "the oopposite way" and that should unleash more HP. and what exactly are camshafts and cams?? cams are the gear thingys and camshafts are what again?? i would really appreciate it being explained!! thanks in advance!!

Post by **96_S14_SE** » Sun Apr 13, 2003 10:14 am

If you want to know the basics of cams Read this:

First off I wouldnt reccomend you go internally if you dont even know what the cam does... If I where you I would buy a set of 240/248 s13 cams or a set of 248/248 nissan motorsports cams and have someone else install them... The reason being is they are direct drop ins and there are less risks involved. Simple things like over / under tightening, and improper tightening sequince can be detrimental. Just these simple things alone can lead to journal caps comming off or snapped cam shafts...Then there is the whole miss relocation of the camshaft while rotating it.

My best friend, a nissan tech, counted the teeth for me and made an honest mistake. He rotated it 3 teeth vs 4, and while my car still ran (idled like ***, or like a v8 with a very hot cam setup, ive never seen my engine move so much), it could have very well had something go wrong. Then if something like this happens but you dont bother to cleck to see if the piston will slap a vavle prior to startup, youll get lovely 0 compression...

Luckilly I was insistant on matching up my marks (its a pain in and of itself with my many minutes manually cranking the engine) before taking the cam back out. When I did I noticed the mistake, and had I not noticed this I would have put the stock cam back in but 1 tooth too far CW and it would still be off.

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

What year can 240 can I get the 240/248 spec camshaft. I have a 95 so it will have to be a earlier year 240SX. Thanks!

Post by **96_S14_SE** » Sun Apr 13, 2003 10:14 am

All 91-92 240s will have the 240-248 cams, and some 93's... From what I know and have read from others, nissan started using the 232-232 in 93 when they removed the SCV (swirl controll valves, aka secondary butterflies) from the intake manifold. So find an early production run of 93' where the scv are still in the mani and it should be good.

If you are uneasy with that just look for a 91 or 92, and itll be 100%.

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Thanks

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Does anyone know of a quality junkyard that will sell me a set of cams or does anyone know someone that is parting out a 91 or 92 240?

Post by **RaVeD240sx** » Sun Apr 13, 2003 10:14 am

yo 96_s14_SE you got mail.

help me out thank's

price for this $10 buck's ....

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

What is the spec on this camshaft?

Post by **96_S14_SE** » Sun Apr 13, 2003 10:14 am

its a 248 exhaust cam going into a s13 head.

Post by **cow** » Sun Apr 13, 2003 10:14 am

Does anyone know the LIFT on S13 or S14 cams? Any differences?

Post by **I am Technoman** » Sun Apr 13, 2003 10:14 am

I think it's 248 degree 411 lift.

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

96_S14_SE: Who is selling the camshaft? I'll buy it from them. My e-mail is [email protected] .

Post by **96_S14_SE** » Sun Apr 13, 2003 10:14 am

Its his cam, and If he typed better, would have stated "I just purchased this for 10 dollars"... I just knew what it was because he emailed me saying he just purchased a s13 exhaust cam and had questions about putting it in his s13 head ala 4 teeth method.

Post by **RaVeD240sx** » Sun Apr 13, 2003 10:14 am

correct its my cam.. its beeing droped into a 91 240sx..(2 exh cam's lol) any how i live In Atlanta and should be able to pick up at least 4 exhaust cam's out of 91-92 240sx from a junk yard..price unknow but very similar.. I'll reply later>>>

Post by **Exar-Kun** » Sun Apr 13, 2003 10:14 am

E-mail me if you live in atlanta, I want an exhaust cam for later things...-chet

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Is someone selling a 248 spec camshaft? I only need one. I can't find a seller in the classified section on this forum.

Post by **RaVeD240sx** » Sun Apr 13, 2003 10:14 am

how much are you willing to pay + S/H ..i could get 1 tomorrow>>>

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

$20 for the camshaft and $15 for the shipping. I only need one in a 248 or 240 spec.

Post by **nismostreetracer** » Sun Apr 13, 2003 10:14 am

Change that get me two 248 camshafts. I'll pay $30 plus $10 shipping.

Best camshaft combo

Best camshaft combo

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