Cam swap/ Stumped please help/update/got her running
#1
Cam swap/ Stumped please help/update/got her running
Ok so I was finishing up my build put my heads on spun motor by hand everything seemed fine tried to fire her up won't start... So I was thinking maybe I installed cam off by a tooth took off over cam is perfectly aligned I tried to spin motor this time it gets to a certain point then seems like its stuck I turn counter clock wise get to a certain point then feels stuck I'm stumped and don't know what to do anyone know what the first thing I should do??
Last edited by chevybayboy; 11-28-2012 at 06:48 PM. Reason: updated
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#9
i have not seen PTV problems with the Torquer V2, although possible, it is more likely that your cam is not installed correctly, or your pushrods are to long. did you do a rocker swipe test?
#10
I have untouched 243s but I was just reading somewhere when installing the aftermarket rockers each set you install that cylinder needs to be tdc and the motor is a 98 ls1 with 02 243s 7.4 pushrods
#11
Cylinder 1 tdc dot to dot everything spun fine until prs... I also have the brain tooley spings
#15
You may need shorter pushrods with the LS7 lifters, I had to go 0.050" shorter to get the right preload (~0.070). Not sure if this is directly causing your problem or not.
#16
Did the motor just turn over when you tried to start or did it make any popping or backfire noise? Also your car is a 98, if you're still using the 98' coil harness, you have to make sure the the LH & RH harness are not swapped.. The car will not run if they are.. The pin-outs are different from 99-02 models that can be swapped. If you still have your factory rocker arms, I would throw those back on & try again.. I can't see 7.4's being to long on un-milled 243's.. I run 7.425's on my 243's with a much larger cam.
#17
Did the motor just turn over when you tried to start or did it make any popping or backfire noise? Also your car is a 98, if you're still using the 98' coil harness, you have to make sure the the LH & RH harness are not swapped.. The car will not run if they are.. The pin-outs are different from 99-02 models that can be swapped. If you still have your factory rocker arms, I would throw those back on & try again.. I can't see 7.4's being to long on un-milled 243's.. I run 7.425's on my 243's with a much larger cam.
#18
Yes, I'm running LS7 lifters & my cam is 236 on intake duration using longer 7.425 pushrods.. Are you still using ur old 98 coil harnesses? Make sure the coil leads are in this order.
1. PPL
3. LT BLU
5. BRN
7. DK GRN
2. RED
4. DK GRN/WHT
6. BRN/WHT
8. LT BLU/WHT
1. PPL
3. LT BLU
5. BRN
7. DK GRN
2. RED
4. DK GRN/WHT
6. BRN/WHT
8. LT BLU/WHT
#19
Ok thanks ill make sure.. I'm putting each cylinder tdc then doing the rocker on that cylinder to see if this is where the ptv problem is then I will use this make sure each harness is on the right side