Any one running Howards Cams?

AJ/FormS said
View attachment 1715210329

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

It works great, This engine has head milled as to get 9-1 compression also here in So Cal we can only get 91 octane fuel. So with that info the set up is 11 degrees initial and 30 total with, vac set at 3 turns CCW from stop and engine speed of 2,500 rpm for 50 miles a day commuting I am pulling about 21-23 miles per a gallon. This number would be higher if it was only freeway miles and no hills, but since I live in a mega hilly area it is what it is. Almost like every stop light is at the bottom of every hill. This same grind is going into a 100% rebuild with some head work. But since I work for Crower I have access to a lot of machines not open to everyone. The one problem with this wallace computer/calculator is it does not account for ramp rates or area under the curve. The two cams above "along with many others" I put them on our cam doctor and started do all the necessary derivatives for , Velocity, acceleration and finally jerk. What I was trying to get was massive area under the curve with out the massive cam BS for a daily driver. In other words take advantage of the 0.904" lifter. Without making this way to long I can say that F21129 has 1% more area under the curve than the Howards and 3% less than the Isky. I was trying to make a cam that was a tweener ha ha ha ha. Anyways yes it is a great cam with great real world driving, and a mountain of data to back it up.