Any one running Howards Cams?
Part Number/Work Order Number F21129
Engine Application SLANT 6CYL.
Grind Number 1/4 Race Cam
ADVERTISED CAMSHAFT SPECIFICATIONS:
INTAKE: Duration: 240º Lift: .449 Clearance Hot: .020
EXHAUST: Duration: 244º Lift: .449 Clearance Hot: .022
The specifications listed above are based on a rocker arm ratio of 1.50 IN/1.50
Timing Events
The information below is for degreeing cam only. Correct only at .050" tappet lift.
INTAKE; Opens: -2.0 ATDC/Closes: 30.0 ABDC
EXHAUST; Opens: 40.0 BBDC/Closes: -8.0 BTDC
LOBE SEPARATION 110º
Duration at .050" :Intake: 208º/Exhaust: 212º
LOBE LIFT; Intake: .299/Exhaust: .299
4 degrees of advance have been ground into this Camshaft.
If using "Lobe Center" method of degreeing, cam should be installed on an intake centerline of: 106º
NOTES:
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Nice cam; but I wonder if it will work in a 9/1 engine. Using their advertised numbers I get an ICA of 46* which I arbitrarily shrunk to 41 for lash allowance, and the Wallace says;
Static compression ratio of 9.0:1.
Effective stroke is 3.76 inches.
Your dynamic compression ratio is 8.29:1 .
Your dynamic cranking pressure is 169.18 PSI.
V/P (Volume to Pressure Index) is 104
Part Number/Work Order Number F21129
Engine Application SLANT 6CYL.
Grind Number 1/4 Race Cam
ADVERTISED CAMSHAFT SPECIFICATIONS:
INTAKE: Duration: 240º Lift: .449 Clearance Hot: .020
EXHAUST: Duration: 244º Lift: .449 Clearance Hot: .022
The specifications listed above are based on a rocker arm ratio of 1.50 IN/1.50
Timing Events
The information below is for degreeing cam only. Correct only at .050" tappet lift.
INTAKE; Opens: -2.0 ATDC/Closes: 30.0 ABDC
EXHAUST; Opens: 40.0 BBDC/Closes: -8.0 BTDC
LOBE SEPARATION 110º
Duration at .050" :Intake: 208º/Exhaust: 212º
LOBE LIFT; Intake: .299/Exhaust: .299
4 degrees of advance have been ground into this Camshaft.
If using "Lobe Center" method of degreeing, cam should be installed on an intake centerline of: 106º
NOTES:
___________________________________________________________
Nice cam; but I wonder if it will work in a 9/1 engine. Using their advertised numbers I get an ICA of 46* which I arbitrarily shrunk to 41 for lash allowance, and the Wallace says;
Static compression ratio of 9.0:1.
Effective stroke is 3.76 inches.
Your dynamic compression ratio is 8.29:1 .
Your dynamic cranking pressure is 169.18 PSI.
V/P (Volume to Pressure Index) is 104
