PTaddict:
This should be in line with the rest of the engine modifications. Please take a look and see if you agree. If I wanted less cam, I could just go down to 1:5 Rockers all the way around.
I called Crower again and ended up with this set up. It is as close to the current solid roller in the car.
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Part Number/Work Order Number 00404
Engine Application 262-400 CHEVY
Grind Number 232HR240
ADVERTISED CAMSHAFT SPECIFICATIONS:
INTAKE: Duration: 294º Lift: 0.54 Clearence Hot: 0
EXHAUST: Duration: 310º Lift: 0.564 Clearence Hot: 0
The specifications listed above are based on a rockerarm ratio of 1.5 IN
1.5 EX
RECOMMENDED VALVE SPRING INFORMATION:
Part # 68390-3 Single Dual X Triple
Approximate spring pressure: valve closed: 110/120 LBS.
valve open: 340/350 LBS.
8.0
BTDC 4.0
ATDC
ABDC
48.0 60.0
BBDC
The information below is for degreeing cam only. Correct only at .050" tappet lift.
INTAKE Opens: 8.0 BTDC
Closes: 48.0 ABDC
EXHAUST Opens: 60.0 BBDC
Closes: 4.0 ATDC
LOBE SEPERATION 114º
Duration at .050" Intake: 236
Exhaust: 244
LOBE LIFT Intake: 0.36
Exhaust: 0.376
If using "Lobe Center" method of degreeing, cam should be installed on an intake centerline of: 110º
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Since I have two ratios of rockers on the current set up (1:5 ex. and 1:6 In.) It throws the actual numbers off on any cam I get, short of a custom grind. If I put 1:6 on the exhaust as well, the lift on the above cam becomes, .579 intake and .602 Exhaust, with the Duration staying at 236/244 @ .050. The LSA will also be the same at 114 degrees.
The tech at Crower said this set up will up my vacuum and really let the heads breathe. It should make great power from 2900 to 6300 rpm's, and since it is a 400 ci. low end grunt shouldn't be to bad.
If you have any thoughts or comments, please let me know.
Thanks,
Ty
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