248 cam swap help
#1
248 cam swap help
I just did the S13 248 exhaust cam swap on my S14. The car dyno'd at a healthy 141whp before the swap, the 248 was put in with 2.5 degrees advanced (redrilled sproket) and rotated 4 teeth CCW.
After the swap the car started up fine and sounded good. We dynod the car once more and the results were quite dissapointing. The car lost a whole 20whp. It dynod at 121whp.... Wtf?
The only problem we could think of is that when we rotated the cam four teeth CCW we counted the tooth we were on as 1 (one), and counted three over from there. So we opened her back up and moved it one more tooth CCW. Now the car wouldnt even start, intake side was opening way to early.
Anyone that has done the swap have any input on what went wrong? Any ideas what so ever??
Thanks
__________________
now i got this from zilvia and i had this happen to me..so when you say 4 teeth do u mean the spiky teeth or 4 links?? need help asap!!!
After the swap the car started up fine and sounded good. We dynod the car once more and the results were quite dissapointing. The car lost a whole 20whp. It dynod at 121whp.... Wtf?
The only problem we could think of is that when we rotated the cam four teeth CCW we counted the tooth we were on as 1 (one), and counted three over from there. So we opened her back up and moved it one more tooth CCW. Now the car wouldnt even start, intake side was opening way to early.
Anyone that has done the swap have any input on what went wrong? Any ideas what so ever??
Thanks
__________________
now i got this from zilvia and i had this happen to me..so when you say 4 teeth do u mean the spiky teeth or 4 links?? need help asap!!!
#5
what about 5 teeth counter clock or putting the 248 in stock 240 position?do u think that would work?since i jus got my motor back together with no intake on yet i think im goin to test out different tooth setting and turn it by hand and see how it turns out with out bendin vavles
#7
but my friend did the same swap 248 intake and exhaust ran fine but today it wouldnt start n sounded like it somethin was getting jammed up when he went to start it n go home..like was gettin caught on somethin or a tooth broke somewhere..?!..would a valve hittin the piston some like that?
#8
but my friend did the same swap 248 intake and exhaust ran fine but today it wouldnt start n sounded like it somethin was getting jammed up when he went to start it n go home..like was gettin caught on somethin or a tooth broke somewhere..?!..would a valve hittin the piston some like that?
#9
when we turned it by hand it turned ok was a lil tuff spinnin it by crank but we did 2 rev to be sure.then i went to start it ,she almost started but then it stop again like a wrench or somethin was thrown in there..hope a rod didnt break..im soo pissed at my boys car right now.we threw that stock in cam in and still the same results
#10
when we turned it by hand it turned ok was a lil tuff spinnin it by crank but we did 2 rev to be sure.then i went to start it ,she almost started but then it stop again like a wrench or somethin was thrown in there..hope a rod didnt break..im soo pissed at my boys car right now.we threw that stock in cam in and still the same results
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