248/232 cam problem

[numbnuts240]

update: got the new cam cap bolts in. installed another 248 cam. fired it up it ran like it should with that cam combo. there was some noise coming from the front of the valve cover that sounded like the noise that's described when the chain is slapping the guide. there was also some smoke coming from the egr tube area. the next day i took the vc back off, as well as the upper timing chain cover and removed both guides. i also found that the tensioner was not moving as freely as it should, so i loosened that up as well as the lower chain tensioner. got it all back together and the noise was gone. after idling for some time, the smoke also stopped (i'm thinking i might have just dropped some rtv on the exhaust and it was just burning off). took the car for a drive, it pulls nice and the idle is pretty cool sounding.

cel is on, i borrowed a code reader and i'm getting, iirc, p0340 and p0350. idk if those code numbers are right, but they were for the cam position sensor and knock sensor. i'm thinking they might be there from when the first cam broke but i wanted to see what you guys thought before i just erased them and went on with life.

oh, also did a compression test before firing it up the first time just to be sure. i have them written down at home so i don't remember which reading went with which cylinder, but i got 205, 210, 215, and 215. i'm sure the 205 would have been higher had i cranked it a little bit longer. also, these numbers were done when the engine was cold.
Modified by numbnuts240 at 5:56 AM 11/16/2009

[breadbox]

Nice. Glad you got that done.

How does the idle sound cool? does it beatbox or something?

[numbnuts240]

idk how to explain it, but it made me pull one of these



sounds like this. not me, the car.

[Lonismos14]

Try putting an oil pan gasket on. jk

Im glad you got your car back running, cause when i was reading it i was like damn he might have bent a valve. Can you notice the difference performance wise

[numbnuts240]

Try putting an oil pan gasket on. jk

Im glad you got your car back running, cause when i was reading it i was like damn he might have bent a valve. Can you notice the difference performance wise

yeah, bent valves were my biggest concern. you can definitely feel that the car has a bit more pep in its step. nothing mind blowing, but it's a nice little extra oomph. i did a couple 2nd gear to 5th gear pulls on the highway on ramp. the cam swap coupled with the wider z32tt wheels was a lot more fun and confidence inspiring around the 180* bend of the on ramp.

[simmode1]

That loping idle sounds great. What kind/diameter exhaust piping do you have and do you have an aftermarket header, too?

Realistically, It'll be a long while before I a swap motors. Maybe I'll spend a little time and do this after all, especially considering I've already got all the parts...

[numbnuts240]

stock header, 3" catco, 80mm greddy ti-c. it rattles the windows in my garage lol. sounds great though. i'll see if i can shoot a quick video with my phone later and post it up. if i remember after work.

Maybe I'll spend a little time and do this after all, especially considering I've already got all the parts...

it should only take 1.5 hours tops. realistically, only about half an hour, but you have to let the rtv set up and that's where that other hour comes in.

[simmode1]

it should only take 1.5 hours tops. realistically, only about half an hour, but you have to let the rtv set up and that's where that other hour comes in.

Thanks! I'm curious about this mod all over again! lol I wanna see how it sounds/feels with my ebay header, gutted cat & 3 inch Circuit Sports exhaust...

Lol... I can see me becoming interested in KA-T again if i actually break down and do this...

[numbnuts240]

from what i've read, it's a great cam combo for manual transmission cars and it's also a great cam combo for ka-t. i'm putting the s14 on hold for quite some time to get some work done on my s30 so i figured this will net enough fun for now.

[simmode1]

from what i've read, it's a great cam combo for manual transmission cars and it's also a great cam combo for ka-t.

It's funny you mention that. I know the thread you're referring to about this setup's KA-T credentials. But it seems like some of the guys in the KA-T forum think its too restrictive and prefer the 248/248 setup. So, the merits of the 248/232 swap in a KA-T application is still up for debate....

[DMan II-40]

Either way, 248/232 is more aggressive than 232/232 for KA-T. After I get some stuff I have planned done I cant wait to do this cam set-up. It will be my first time actually opening up my engine! I only work on my car every now and then, so might be awhile.

[motoman399]

hey sorry to bring back a little bit of an older thread. but do you notice a huge loss in low end till about 5k rpm? also what is your ignition timing set to?

[numbnuts240]

ignition timing was not changed at all. i did notice a tiny bit of loss in the lower rpms, but it's negligible and it definitely doesn't last until 5k. at around 2500-3k is when it gets nice and it pulls for a while. i find it perfect since that's normal cruising speed for me.

car will be getting a complete tune-up next month and back on the road for april, so hopefully it will feel better than it did when i finally got it running.

[motoman399]

thats weird. i helped my friend rebuild his car (cheap re-ring) and when we did it we put in a s14 upper intake manifold, s14 exhaust cam, s13 exhaust cam on the intake side (rotate 4 teeth counter clockwise) and removed just a few emissions things (like air injection and associated vacuum). the car runs and idles great, but it has s*** for power untill 5-5.2k rpm. we tried turning the cam back a tooth and we turned the engine over by hand and it was fine. when we started it, it had a minor ticking so we shut it off and put it back to the 4 teeth.

we still need to do a compression test on it. but im sure its fine. the car used to smoke and have bad compression like 145-155. and now it doesnt smoke but is slower than balls...

i guess i will do a compression test on it and maybe go one more tooth counter clockwise on the intake side. try that??

[numbnuts240]

something definitely isn't right if the power band was shifted that much. it sucks that all the old threads on this no longer have working pictures. i know there was one that showed what position the cams should be at with the engine at tdc, but like i said, those pics aren't working anymore.

[motoman399]

well the lobes of the cams in the front should be the same as stock cams with stock alignment so i think i have that down. i tried to make an adjustable cam gear for it and i think it helped a little bit but i dont think i got it precise enough. i think im going to have him come over today and try to mess with it. thanks for your help. ill let you know what we do.

[motoman399]

man that lope is cool. we adjusted it again. not sure how many teeth, he dropped the gear loosing the timing mark. lucky for him i know the general direction of the front lobes and i got it back to where the valves werent hitting anymore. he would have been lost without me lol. but it pulls WAY BETTER a huge improvement. the lope is so mean sounding. but i think he needs new motor mounts. his seem to be shot and shakes the engine a lot. thanks for your help

[numbnuts240]

sweet. it does sound way better. i also noticed a decent amount of engine shaking. this weekend i think i'll just adjust the idle a tad higher to minimize it since i'll be doing some maintenance anyways.

[krash]

hmmmmmmm, I have these parts as show pieces in my room....... maybe its time to put them to work

[numbnuts240]

i want to frame my broken cam and hang it in my garage.

[krash]

yea I love stuff like that. There are random car parts that I've cleaned and set up all around my room

[numbnuts240]

i've got so many car parts between my garage and the z room. i need to unload some of my extra s***.

[krash]

Polish them and make things out of them. Some stuff can be made in to pretty cool functional pieces, or just display stuff. The trick for putting them in the house is to get them really clean, then it doesn't look like trash

[numbnuts240]

like my crack table, made with incomplete sets of wheels?

[krash]

sweet, dude I have the same set-up for my nightstand:

[numbnuts240]

haahaha nice. i can really make 2 more, but i'd need more glass. maybe i can do something cool with the l26.

[Dittoz7]

Might Do This Just Because.......................Your Sexy

[numbnuts240]

do what? the cam swap? do eet. like yesterday fool.

You're Sexy

i know.

[Razi]

i wish I could find S14s at my junkyard to take this cam off of.

[NismoZRS]

as soon as my friend comes back to maine, im buying his S14 cams and doing this set up..

question tho, where do you feel the powerband lies??? i drift so i wanna make sure im setting it up right for the track (its an oval track so ill be 2nd gear high end revving)