s13 cam into s14 problems

[nissanpunkrock]

so i bought a 248 from a 91 240put my motor to tdc (i think)the cams were both pointing outthe timing marks on the crank were lined upthe 1st piston was at tdc (so would have to be on compression stoke right?)i removed the cam gear and zip tied it to chain to keep stock set upswaped camsmoved gear teeth 4 to leftput gear back on cam and spun cam little till it would fit onto gearput all back togetherspun motor 1080 deg. to make sure no valves gunna hit... goodbut when startit reved up to like 1400 then droped to 300 then sputterd around 500 like it really really wanted to dieso...........did i not get tdc on compression?is my timing off?the cams are not pointing exactly away from eachotherbut this is cuse the 4 teeth i had to move... correct?

thanks everyonejosh

[nissanpunkrock]

so i just tried to go back stock, spun the intake gear 4 teeth clockwiseand now it wont run at all... everytime before i start it i spin it lots to make sure valves clearwell did that and valves all goodbut just wont run now...ideas??

[xweav32]

this happened to me its easy to fix. set your motor back to tdc. push on the tensionor to relieve pressure on the chain. put exhaust cam pointing directly right as it looked originally. do the same for the new intake cam. you can eyeball it. on the exhaust put the chain on the cam gear and hold it on the gear tight. then lift up on the intake side of the chain as hard as you can to put it on the intake gear. now hold the now tight chain on the intake gear. the make it tight on the exhaust gear. once the chain is tight and the cams look to be in time. use a straight edge if needed, they will still be pointing directly opposite of eachother.

the first time i did it i was off by 5 teeth, with a little persistance it can be done. look up the timing chain guide removal post and it has plenty of pics of the timing. that should help.

[xweav32]

also pull your distributor cap and make sure the rotor is at the #1 cyl. oh make sure you out you wires in the right order thats a pretty easy mistake to do. if you need anything else just post ill try to reply as fast as i can.

[98s14inaz]

Use the JWT cam swap pdf file. Print with color pictures. By far one of the best tutorials on how to line up the cams. If it looks like the pic you are fine. You'd know if you bent valves, don't ask how I know.

[nissanpunkrock]

xweav32, i think i understand what your sayingget my motor to tdc according to crank pully, check dist. to be on #1 cy. then take intake cam gear off and slip chain off exhaust gearspin exhaust cam till points out, away from the motorthen spin intake cam till it points out, away from motorthen lay the chain back in exhaust cam gearthen put intake cam gear back on intake camif i do this, I think my chain keys will be all messed up, which makes no since to me cuse I never took them off of the bottom gear or exhaust gear, but that wont matter cuse motor and cams will be in tune with crank showing tdcdoes that sound right?
Modified by nissanpunkrock at 9:07 AM 4/2/2008

[nissanpunkrock]

can see how exhaust is pointing a bit up

crank is showing tdc

so if i just take chain off exhaust and move it 2 teeth cw would look like this



could the exhaust being off stop the motor from running...i know intake you can play with a bit but idk about exhaust

[xweav32]

ok this is what mine looked like too. the chain wont fall off the bottom if you do one cam at a time. the car will run like it is now it just wont idle. anyways do the exhaust side first. as long as the tensioner is pushed in the chain has slack. its easier if you have someone to help too. take the gear off exhaust cam then rotate the cam CW til it looks to tdc. put the gear back on. torque it. then repeat on the intake side only rotate the cam CCW. the should look like the cams in this pic

yours are what mine were like. i did exactly what i just told you. dont worry about counting teeth now it wont help. if it looks like the pic then your golden. if its even one tooth off youll be able to tell.

i drove my car with the teeth that far off i just had to stay on the gas constantly. thats how awesome nissan's are lol. be patient dont rush through, the pay off is worth it. when i got mine timed right and running smooth, it pulled like a b1tch from 3000rpm to redline (ihave an auto ecu in a manual car so redline is 7200rpm). its worth it. just take your time.

[xweav32]

oh forgot judging by you pics you will have to adjust both intake and exhaust cams respectively.

[nissanpunkrock]

got em lined up and runs perfectthanks xweav32was some good quality tool time ha

[supreamS14]

How does this feel compaired to stock? About how much of a gain does this add? Thanks for the input!

[nissanpunkrock]

my 95 240 is all stock but my cai so this is my second mod of many more to comeima do tein coilovers nextbut really its hard to tell its any fasterit pulls a little harder from 3800 north but i dunno it was easy and cheap so why not

[xweav32]

i felt a massive increase in midrange torque and top end. when i shift at redline thers power in the next gear compared to the lack or power with the stock cam.changes exhaust note sounds betterimproves fuel economy massively. cruise at 55-60mph for a long distance you'll seelopes at idle sounds sexy as hellallows you to cruise at 35mph in 5th gear.it shaved 1.2secs off my 0-60 time.overall for the price and the easiest of the install you cant go wrong.how else can you can 15hp for under 500 dollars?

[nissanpunkrock]

dude there is no way in hell it added 15 hpha unless maybe your boostedbut even then 15??maybe 5 but ive never seen a dynowhat mods do you have, i want 15 hpdid you drill your gear for 2.5 deg adjustment?

[xweav32]

maybe 15 is a little much. but its enough to FEEL it. still for the cheapness its worth it.

short ram intakeno drillheaderCATLESS exhaustelectric fan(no clutch fan)

all this for now. ive got a 95 motor in my garage waitin to be put back together for KA-T. are u running auto or manual?

[alkemyst]

I think I am off by a tooth too. I lined my intake like my exhaust cam was...but looking at your 'bad' pics it was slightly pointing up I think....also my exhaust cam 'dot' was between a link, unlike JWT's pic of right on one. It may have skipped a tooth while i was doing the intake side.

Both were pointing slightly up when I was done...I thought that it was horizontal enough. It looked like the drawing in the cam sprocket guide on JWT's site.

How are some of you guys getting the cams swapped and running so fast? Are you not using RTV?

Also what will be the easiest way to get my cams rotated...it was a PITA to get the cam into the journals when I swapped it.

Car seems to run fine but will only idle if I tap the gas a bit...then it will idle indefinitely until I rev it again.

Thanks

[nissanpunkrock]

ima 5 speedwhat i did was took the exhaust cam gear off spun it till it was pointing perfectly out, then reinstalled gear and chainthen did same on intake side, took gear off, pointed perfect out, then reinstalled, then i had to reajust my exhaust one more time cuse after adjusting my intake it showed me my exhaust was still one tooth off.

really just make sure your at tdc, then just eyeball it to make sure both are pointing perfectly out, look at the pics of the #2 piston cam lodes on the intake and the #3 piston cam loads on exhaust, they also help to figure out where cams need to be pointed

to get the cams in, lay cam in, and if it dont fall in, take one journal at a time and slowly pull them down and it will pop cam in, but dont make anything bind or bend and dont stip the soft alluminum head, and take your time

search, find as many pics as you can and ALWAYS spin crank like 100000 times befor you start motor cuse valves and pistons dont like to touch

my 2cent

[alkemyst]

ahh didn't think of observing the 2-4th lobes too.

Makes it alot clearer now.

I am sure I am off a tooth even though I counted it out...I may have made my initial mark a chain spot off and it threw off all my counts.

[xweav32]

i couted it 8 times and marked it and was still of teeth. idk y but i was.

[xUNGRAT3FULx]

just wondering if theres any pictures to this cuz im in the middle of doing this swap already bent 3 valves jus got my head back and dont want to do it again

if im reading correctly to rotate the cam 3 or 4 teeth ccw you jus set it to TDC and then rotate the gear and rotate the cam until it pops in? meaning the cam will no longer be pointing straight out?

sorry to bring back old thread