General Category > Quadrajet Carb Talk and Tips
cam selection
tayto:
Cliff one more question concerning the HD timing chain, do you find they stretch much after "break in" like the bicycle chains do? should i advance my cam with an offset key? think you can get them in 2 and 4 degree offsets.
I degreed the cam, even without a cam card. I found the ICL @ 120* and LSA @ 115* if i'm understanding correctly the cam is already 5* retarded? i installed dot to dot with #6 @ TDC.
Cliff Ruggles:
Those chains don't require additional advance to account for chain stretch.
120 ICL? I would think it would be a lot further ahead than that. What are the cam specs?
tayto:
Internet says 202/207 @ .050" duration. .269"/.277" lobe lift. 114.5* LSA.
This is what I found
Intake
Lobe Lift: 0.262"
Open @ .050" 18* ATDC
Close @ .050" 42* ABDC
Duration 204*
ICL 120*
Exhaust
Lobe Lift 0.265"
Open @ .050" 34* BBDC
Close @ .050" 8* BTDC
Duration 206*
ECL 111*
LSA 115.5*
I plugged numbers into an online cam calculator and it's almost like my Intake and Exhaust are backwards? I did all measurements on cylinder #1, intake lifter furthest away from the front of the engine and exhaust closest. This was my first time degreeing a cam, I think I made some errors along the way...
Cliff Ruggles:
Try checking the intake open point at .050" and see if it's close to 18 ATDC......
tayto:
when i checked the intake @ .050 it was 18* ATDC
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version