Howard Hydraulic Roller Cam
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Mountain Pass
Joined: Aug 2014
Posts: 162
Likes: 21
Howard Hydraulic Roller Cam
Need opinions and experiences...
Trying to make up my mind on one of the engines that will be moderately built. .030 over 390 block (hyperT pistons), Rebuilt D2 heads that have been cleaned up and will be port matched for a Blue Thunder single 4 bbl dual plane (750/780 vac secondary Holley), Sanderson shorty headers, also have a set of those knockoff thick flange stainless shorty's I got super cheap, just need to figure out which set clears everything better. If I did my math correctly I think I'm ending up with a 9.7-9.8 compression ratio, and max RPM will be in the 5300-5600 range.
I have an unused Comp Cams 33-224-3 hydraulic flat tappet cam sitting on the shelf, but have been thinking about one of those retrofit hydraulic roller cam packages, as an example a Howard HRCCL250705-10. 1800-5400, 272/278 duration, .510 lift w/ 1.7 rockers.
So the big questions, anyone have experience with running Howard cams? Do you feel it's worth it to step up to the roller cam from the flat tappet? Does going with a hydraulic roller cam affect any of the standard oiling system mods people do on FE's?
Trying to make up my mind on one of the engines that will be moderately built. .030 over 390 block (hyperT pistons), Rebuilt D2 heads that have been cleaned up and will be port matched for a Blue Thunder single 4 bbl dual plane (750/780 vac secondary Holley), Sanderson shorty headers, also have a set of those knockoff thick flange stainless shorty's I got super cheap, just need to figure out which set clears everything better. If I did my math correctly I think I'm ending up with a 9.7-9.8 compression ratio, and max RPM will be in the 5300-5600 range.
I have an unused Comp Cams 33-224-3 hydraulic flat tappet cam sitting on the shelf, but have been thinking about one of those retrofit hydraulic roller cam packages, as an example a Howard HRCCL250705-10. 1800-5400, 272/278 duration, .510 lift w/ 1.7 rockers.
So the big questions, anyone have experience with running Howard cams? Do you feel it's worth it to step up to the roller cam from the flat tappet? Does going with a hydraulic roller cam affect any of the standard oiling system mods people do on FE's?
Cargo Master
Joined: Oct 2020
Posts: 2,676
Likes: 785
Howard Cams has some good stuff but you should check and see if they have what you want in stock. Right now they just like all cam companies are suffering from shortages. Cam cores and lifters are hard to come by right now.
There are no SADI or two piece cam cores available for the FE so you cannot run a cast iron distributor gear. The oiling system isn't any different than with a hydraulic flat tappet camshaft except that you wont be able to run the stock valley tray. If you want to use the original non adjustable rocker arms with the hydraulic roller it can be done but it will require a custom pushrod.
There are advantages to running the roller cam over a flat tappet. You don't need any special oil. 10W-30 oil from Wal-Mart will work fine. The cam wont necessarily make any more torque or horsepower when compared to a flat tappet but it is possible.
There are no SADI or two piece cam cores available for the FE so you cannot run a cast iron distributor gear. The oiling system isn't any different than with a hydraulic flat tappet camshaft except that you wont be able to run the stock valley tray. If you want to use the original non adjustable rocker arms with the hydraulic roller it can be done but it will require a custom pushrod.
There are advantages to running the roller cam over a flat tappet. You don't need any special oil. 10W-30 oil from Wal-Mart will work fine. The cam wont necessarily make any more torque or horsepower when compared to a flat tappet but it is possible.
Thread Starter
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Mountain Pass
Joined: Aug 2014
Posts: 162
Likes: 21
I have a MSD billet for it, I'll have to look to see which gear is on the distributor. When I tore down this engine it had already been rebuilt with the 4.08 bore, the intake gasket was the one piece style with the shield under the intake, but there was no valley splash shield above the lifters. I assume who ever did the rebuild left it out.
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