that 240/248 cam swap

[slikklogic]

i keep reading up on this cam swap from the 91 s13 but i belive my s14 hada fresh motor put in before i bought it and id like to know what markings can i use to tell what cams i have?..the previous owner didnt have the car long so he didnt know much about it. im about to go turbo so i wana get the best cam option without having to change my tune.( already running a enthalpy)

[s13drifter88]

iirc s14 cams are 230/230 and you can do the s13 240/248 cam swap in an s14. several ppl try to do 2 s13 exhaust cams, this sorta works but cam timing isnt spot on and is best acheived by using an adjustable cam gears. Brian Crower stage 2's drop right in. They would be a good match for a boosted setup later down the road.

[slikklogic]

Iirc?? ..yea I kno ppl do the swap but how do I tell the differance inbetween the cams? The 230 and the 240 and the 248 lol

[s13drifter88]

Iirc = if I remember correct. Any machine shop should be able to degree them for you. Also, after market cams shouldn't require any tuning unless you go big and nasty with them. They'll also improve spool and response from any turbo you choose, excluding anything under sized. What are you're plans for the car if you don't mind me asking?

[slikklogic]

um wel everything should be set next month i wasnt really tryn to spend $300 on cams seeing as i told my self to be conservative with it cuz its my daily lol but have 370cc, enthalpy tune,n60 maf, and 255 done. need a clutch, oil lines and a nice t28 still. but its gonna be for drift drag and occational auto x.but i have a diff car for track mostly ff drive

[s13drifter88]

with only 370's id keep a close eye on ur AFR's. you should be fine on the wastegates 10psi but anymore could spell trouble with 2 T's. If you have the time and money ect ect you might want to look into a set of 550's and maybe a retune. I have 750's and im running a gt2871r with a Jim Wolf ecu and n62 maf for my CA.

[slikklogic]

yea i could go all out on it but its jus a sporty daily WITH AC very important lol. i have a turbo gsr with 1000cc injectors on a aem and a 3 bar map in the garage for bigger power lol.so u think i should jus leave these cams or i guess measure them to see what they are

[WDRacing]

I have 2 S14 cams in my garage, one has a yellow mark and one has a green mark.

[s13drifter88]

if you plan on building any substantial power with it i would opt for a larger cam. if you just want a fun daily i wouldnt even bother pulling the valve cover off

[slikklogic]

i hada respray it.was nasty lookn lol but i still wana at least know whats in there

[s13drifter88]

im sure theyre stock. if the intake cam has a blue band (it will be faded) and exhaust has an orange band both of which should be infront of #1 lobes they should be s13. if im not mistaken s14 has green for intake and yellow for exhaust but I could be totally wrong. I dont even own a KA anymore so I cant really remember

[WDRacing]

if you plan on building any substantial power with it i would opt for a larger cam. if you just want a fun daily i wouldnt even bother pulling the valve cover off

That pretty much sums up my feelings about swapping around factory cams. If I wanted to upgrade, I'd buy a set of aftermarket cams that matched my build. Otherwise...to much work for not enough gain imho.

[slikklogic]

If I wanted to upgrade, I'd buy a set of aftermarket cams that matched my build. Otherwise...to much work for not enough gain imho.

what i was thinkn mostly but poeple were saying its only $50 so i was thinkn easy way to pick up some numbers.like my civic i run type r cams which proved really good numbers from a stock cam.power keep climbing after 9k lol

[s13drifter88]

well you get options like that with honda. how many b series were there? a1, a2, a4, b1?, c1, c5. you have LS, GSR and Type R. how many KA's are out there, Altima, D21/Frontier and 240SX all of which serve just a commutor/light work class vehicle. the 240 was a little sportier but not by much. not like the difference between Integra LS and Type R and with a honda you have engine options that serve from grocery getter to sport. you get to cross all your engines together i.e. b20b with b18c gsr head. cant do a ka24 with sr20 head for example. only performing cams worth the effort of swapping will be aftermarket. just not that many options with the ka power plant for crossing cams around.

[slikklogic]

yea thats very tru.hondas are some legos everything fits together in any order lol

[s13drifter88]

no sh*t

[SX APPEAL]

i keep reading up on this cam swap from the 91 s13 but i belive my s14 hada fresh motor put in before i bought it and id like to know what markings can i use to tell what cams i have?..the previous owner didnt have the car long so he didnt know much about it. im about to go turbo so i wana get the best cam option without having to change my tune.( already running a enthalpy)

So to answer the original question here... S14's have 232 intake/232 exhaust cams stock. And I'm pretty sure all 240sx's have the intake cams painted with a green stripe and the exhaust painted with an orange stripe. Of course I've only owned a 91 and a 95, so I can't be sure about the 96-98. To say the least there are many swaps you can do, and a lot of info available on here about all of them. Just search for 248/232 (which I've got, sounds the best ) 240/240, 248/248 etc... I remember a guy on here who posted a big thread in which he described his experiences with all these different swaps, I'm sure its still on here somewhere. I'm still with these guys though, as far as a fun turbo daily driver, turning that boost knob another notch is gonna give you a much more noticeable gain than any cam swap.

[SiDwAyZ240]

^^^^^SX, what made you do the 248/232 swap? Why not a dual 248? Just curious cause I have 1 248 and been looking for another, but u say 248/232 is the best which means I have what I need. I also have the 240 intake, so how about a 248/240?

EDIT: Excuse my momentary retardedness, of course a 240 intake cam is not going to work on the exhaust side.

[slikklogic]

^ gimme a cam lol

[SX APPEAL]

I did the 248/232 because I already had those cams, didn't have to buy anything lol. And from what I'd read- particularly in the thread I mentioned earlier, its one of the best compromises between high end and midrange power. Not necessarily saying its the best, but it SOUNDS damned nice hehe

[slikklogic]

not too sound noobish cuz im educated in automotive field but jus trying to picture this cam setup. i read its a good set up while searching but if the intake cam is letting in more mixture then is being released shouldn't it kinda backup into the cylinder?

[SiDwAyZ240]

So it turns out that I'm not so retarded anyway. I just searched and found that thread where the guys tries all the setups and you can use the 240 intake cam on the exhaust side. Towards the end he actually talks about liking the 248/240 a little better than the 248/232. I'm a little confused on having a bigger intake cam also but it seem that with either setup the intake cam is always bigger except for the 248/248 which seems to have idle issues and losses some of the low rpm punch of the ka.

[s13drifter88]

If im correct longer duration shifts the power band higher in the rev band, more hp oriented. lesser duration shifts the powerband lower, more torque oriented. lesser duration should increase port velocity and therefore result in increased throttle response and torque output. I dont know all the profiles of the cams tho as far as lift, lobe separation angle and how much overlap they have. my guess is it could be a better balance in the cam profiles reducing overlap which will somewhat improve torque but then allowing more in also aiding hp. now im just speculating on what i believe may be correct but again, im open to correction anytime. also, wouldnt increasing intake duration and decreasing exhaust duration raise compression due to forcing the cylinders to hold a little more combustion pressure making the engine a little more responsive and rev happy(er)? Input please.

[SiDwAyZ240]

In case anyone was wondering I did my 248/232 swap yesterday. It ended up being way easier than I thought, took 30 min. and for $25 can't beat it. The improvement is yet to be seen cause my car is still on jack stands but it started right up and I think the rev sounds a little more aggressive. Pretty interesting cause when I moved the cam gear 4 teeth counter clockwise it ended up orienting the cams in what looks like stock position; I was expecting some variation in position.

[slikklogic]

that easy huh? i have a feeling id drop the chain and be super pissed..were do i find these cams now? or this 1 cam lol

[SiDwAyZ240]

check it out, just around the corner everything-you-need-to-build-300-hp-ka-t524475.html

248 cams and gears $50

[slikklogic]

Hm ill msg him but I'm nowere near mi... I rather scope one out ina junk yard but I can't find any s13's

[SiDwAyZ240]

Found this one too, his prices are shipped and he's got some of each.
I inquired aobut a braided clutch line he had, and asked about the cams why I had him.

http://zilvia.net/f/sale-items/353751-k ... st-go.html

[slikklogic]

o thats what im talkn bout. ill hit him up and proly get a 240 and 248..i still dont know how to id which cam is which