running 248/232 q? s14 intake cam on s13ka24de exhaust side?

[SPL-Hatch]

ok so i have an s13 ka24de and i have a 232 intake cam from an s14 ka. now with running the s13 248 exhaust cam on the intake side i re-drill for 2.5 degrees advanced correct? then what do i do with the s14 intake cam? just line up the dots? im lost and am looking to get this done this weekend thanks in advance for any help

[SPL-Hatch]

someone told me i need to retard the cam by the same amount to run it on the exhaust side. anyone know if thats true?

[godrifttoday]

What I did instead of drilling is go 4 teeth to the left

[simmode1]

Ugh... this mod again. Soooo not worth it, IMO. You don't really gain any power, it just changes your powerband basically. Thats a tiny benefit versus the possibility of bent valves. $1400 down the drain.

[808drft]

just trash the s14 intake cam and get the exhaust cam. its much easier to swap since you'll just need to install like stock. For the 248 on the intake side do the 2.5* adv. I personally have this swap in my s13. 248 +2.5* and 232 with bolt-ons. I do notice (never dynoed) more midrange and top end. Power still drops off around ~6000rpm (I shift at 6500).

['97 S14 SE Turbo]

lol, this mod... Old... OGs knows where this comes from. Sorry but I have to laugh at this, and also the White Bunny SPL... (there's nothing wrong with wanting this type of powerband.)

[godrifttoday]

Ugh... this mod again. Soooo not worth it, IMO. You don't really gain any power, it just changes your powerband basically. Thats a tiny benefit versus the possibility of bent valves. $1400 down the drain.

Y would u bend a valve? Lol installation error....yes.

Here a video of mine. Just a start up. Disregard the intercooler piping.

http://www.youtube.com/watch?v=NB8XKhIWn4s&feature=youtube_gdata_player

[simmode1]

Not saying there's anything wrong with it. I had i/h/e too, and the gain was arguable. Too be honest, I prefer stock now. I was actually missing my low end with this setup.

Y would u bend a valve? Lol installation error....yes.
Hmm... sort of. The guy I bought it from lied about what kind of KA it came out of. But I have other friends with this mod too and I still prefer the stock 240/248 setup now. I just don't see enough gain in this to warrant the trouble. Should have left the motor unopened and focused on saving for a swap or KA-T instead.

[SPL-Hatch]

is it really not worth it? i thought there was a slight power increase. theres too much mis information about this shit

[godrifttoday]

Do it. Cams cost 10-30 used. U really don't need anything else and about 1hr of your time

[dreamin240sx]

well worth the time i feel its good for drifting i have it done to mine and i love it

[simmode1]

slight
Thats the operative word. Felt like maybe 5 to 7hp left the low end & moved about 2000rpm up the powerband to me... Just my opinion though.

Again, not saying don't do it. Just make sure everything is perfect or you'll feel silly ruining your motor for less than 10hp.

[godrifttoday]

Well let's weigh your options.
1. If u do it=. Do it
2. If u decide to pay some one= don't do it. ( I would say labor +/- $ 100 + cam)

['97 S14 SE Turbo]

Sorry, I have to chime in. I'm the one that started the 248/232 setup back in the day. I was using Nissan Motorsport's repinned 248/248 with JWT cam gears, and was playing around to adjust the power band to my liking.

This setup, on a turbo KA is good for ~7 hp across ~2k rpms (IIRC) in the midrange compared to 240/248 setups, and 248/248 setups. Top end feels weak compared to 248/248 setup. Because I was setting up my car for all around performance, I choose to have the additional midrange power.

I used to have the dyno charts for the back to back runs comparing them.

[sidewayz240]

S13 cams directly into an S14 with intake/header netted a 10 peak whp gain, dyno proven.
10 whp for < $50? Fuck yeah.

[dreamin240sx]

agreed ^.....

[SPL-Hatch]

well i already have both cams. my motor is currently apart for a rebuild, i always do my own work. so if im gonna do this on my s13 ka24 what do i do with running the 232 intake cam on the exhaust side?

[SPL-Hatch]

S13 cams directly into an S14 with intake/header netted a 10 peak whp gain, dyno proven.
10 whp for < $50? Fuck yeah.

it seems like its always on an s14 motor. i have an s13. theres like no info that i can find on the s13 motor running a 248/232 which is why i dont know what to do with the 232 cam on the exhaust side

['97 S14 SE Turbo]

Get a S14 KA exhaust cam.

[SPL-Hatch]

Get a S14 KA exhaust cam.

arent they both 232? or is there a reason to run the exhaust cam?

[simmode1]

This setup, on a turbo KA is good for ~7 hp across ~2k rpms (IIRC)
Yep, that's about exactly how I'd describe how it felt. But on an N/A motor like mine was, gains would be even smaller than this. Just something to weigh.

I'm just done trying to nickel and dime power out of an N/A KA. I'd rather mess with the final drive ratio than open my motor again if I was gonna keep this motor. Otherwise it's save money & effort for a real build or swap.

['97 S14 SE Turbo]

arent they both 232? or is there a reason to run the exhaust cam?

Yes, both are 232. I'm telling him to run the exhaust cam so he doesn't have to re-pin it to run as exhaust.

[ManoNegra]

I've personally been involved in several of these mods
and can't stress the benefits of it
I would recommend this mod to anyone
wanting more performance out of NA setup
but still wanting to pass smog and keep a low profile

no offense to anyone but those that speak negative
about it probably didn't know what they were doing

forget about 232 cams, throw them away
they were put in the KA to soften it and take the truck feel out of it
the 248/248 set up is what you want
4 teeth of adjustment on the timing chain

the power gain is negligible
the advantage as has been mentioned is
that it broadens the power band
you can make power all the way to 6k as opposed choking at 4.5k
the loss in low end is small compared to the gains

now a word of caution
make sure to get the timing right
make sure lobe/shim clearance within spec
follow the torque instructions for the cams on the fsm
the sequence is important and it's very easy to over-torque the bolts

if you want to take it a step further
you can use sohc pistons to increase compression to ~10.7:1
a thicker headgasket is recommended to bring it closer to 10:1
and of course, you'll need to run premium gas only at this point

want more
remove the coolant lines the heat the air in the throttle body
remove the butterfly assembly from the intake
get ready for rough cold starts though
get Nistune and dyno tune the car
the stock ecu is known to run the car too rich (conservative and inefficient)

extra credit
light flywheel
4.36 gear ratio
one piece driveshaft

go forth and conquer

['97 S14 SE Turbo]

You forgot using Datsun roadster clutch and pressure plate. 200mm FTW!!! Lower inertia mass.

and on and on...

[808drft]

forget about 232 cams, throw them away
they were put in the KA to soften it and take the truck feel out of it
the 248/248 set up is what you want
4 teeth of adjustment on the timing chain


thats what I plan to do next. 248 (+5)/ 248 (-2.5). read around, looked at calcuations and figure this would be a nice powerband to try out. if not ill advance the intake to +7.5. i drift so i like the midrange that it would give.

[808drft]

well worth the time i feel its good for drifting i have it done to mine and i love it

yea i drift to and love this set up! i pull on stock ka (w/bolt ons) and keep up with basic sr's. cheap and easy swap to do. just redrilling the cam is the hard/easy thing to mess up.

[SPL-Hatch]

does anyone have an dyno charts to show the powerband difference between the two? i read that the 248/248 setup pushes the powerband past the ka's rev capability, thats why i went with the 248/232 setup cause i read that was supposed to have gains all around with almost no low end loss

[ManoNegra]

read the NA KA FAQ on the engine subforum of Tech
here's the one I posted a while back:

http://zilvia.net/f/engine-tech/91288-na-ka-faq-7.html#post3140195