Christmas Bench Racing - A460 572 Pump Gas Hydraulic Roller @800+ hp?

OK, so this is bench racing at its best during the holidays.  I have spent some time this weekend browsing the master cam lobe list from Comp Cams.  One of their nastiest big block marine hydraulic rollers cams has the following specs:

310 duration - 255 @ .050 - approximately .708" lift

I am calculating on a true daily driver capable (minus the gas bill) 572+ cubic inch bruiser.  I have dreams of putting this thing in a 1965 F100 with a stock hood.  Here are the specs I have in mind based around common parts:
-A460 block
4.5" bore
4.6" Ohio Crankshaft
Trick Flow A460 ported heads
Trick Flow A460 Tunnel Ram
Comp Cams Marine Hydraulic Roller from above
Holley HP EFI setup
Dual Holley 2000cfm throttle bodies- (for visual impact - I think it will fit under the hood)

I believe it can make more than 800 horsepower, if the valves do not float before 6200-6300 rpm.  Can anyone provide recent experience with large hydraulic rollers in the BBF arena?  I would love to take such a setup to Drag Week in the BB Street Race category someday.

Sounds like a lot of fun, but since Drag Week is in your plans, see General Discussion thread titled "what's the catch".

Yep, just did a 572 for EMC

Skip the a heads and tunnel ram.

Use some well worked p-51s and a TFS mafia intake.

You'll want a custom grind and morel lifters.... Do not try to save money on the valve train parts it will hurt later

I'd also do a 4.600 x 4.300 to get the inches, it a little easier on pistons for street driving.

Fox331,
Just buy Dave's engine,it's been proven already. AND,you can see it in PHR this month.

Rick - Dave says he's gonna run the 572 he built for EMC in his dragster. (That's the last I read on the subject anyhow).

Dave - I'm wondering why not go with the a460s to begin with? Especially with the room available in an f100.... I know you did very well with the p51s though.

This is pretty much my goal (hoping for at least a streetable 800) with about 50 more cubes and a460s.

fox331 wrote:OK, so this is bench racing at its best during the holidays.  I have spent some time this weekend browsing the master cam lobe list from Comp Cams.  One of their nastiest big block marine hydraulic rollers cams has the following specs:

310 duration - 255 @ .050 - approximately .708" lift

I am calculating on a true daily driver capable (minus the gas bill) 572+ cubic inch bruiser.  I have dreams of putting this thing in a 1965 F100 with a stock hood.  Here are the specs I have in mind based around common parts:
-A460 block
4.5" bore
4.6" Ohio Crankshaft
Trick Flow A460 ported heads
Trick Flow A460 Tunnel Ram
Comp Cams Marine Hydraulic Roller from above
Holley HP EFI setup
Dual Holley 2000cfm throttle bodies- (for visual impact - I think it will fit under the hood)

I believe it can make more than 800 horsepower, if the valves do not float before 6200-6300 rpm.  Can anyone provide recent experience with large hydraulic rollers in the BBF arena?  I would love to take such a setup to Drag Week in the BB Street Race category someday.

That would be 585ci, I would definitely go with the A460 head and tunnel ram. The camshaft you have listed is way too small to peak at 6300 in that large of an engine.

The Comp HUC marine roller series of hydraulic roller lobes maxes out at 270 @.050 duration and just over .700" lift . If I can get a peak even at 6000 rpm I would consider it a success with a low maintenance valvetrain and pump gas.

Have you called Comp, they may be able to grind you a cam with better specs than what they have in the catalog?

bigblok2000ranger wrote:

fox331 wrote:OK, so this is bench racing at its best during the holidays.  I have spent some time this weekend browsing the master cam lobe list from Comp Cams.  One of their nastiest big block marine hydraulic rollers cams has the following specs:

310 duration - 255 @ .050 - approximately .708" lift

I am calculating on a true daily driver capable (minus the gas bill) 572+ cubic inch bruiser.  I have dreams of putting this thing in a 1965 F100 with a stock hood.  Here are the specs I have in mind based around common parts:
-A460 block
4.5" bore
4.6" Ohio Crankshaft
Trick Flow A460 ported heads
Trick Flow A460 Tunnel Ram
Comp Cams Marine Hydraulic Roller from above
Holley HP EFI setup
Dual Holley 2000cfm throttle bodies- (for visual impact - I think it will fit under the hood)

I believe it can make more than 800 horsepower, if the valves do not float before 6200-6300 rpm.  Can anyone provide recent experience with large hydraulic rollers in the BBF arena?  I would love to take such a setup to Drag Week in the BB Street Race category someday.

That would be 585ci, I would definitely go with the A460 head and tunnel ram. The camshaft you have listed is way too small to peak at 6300 in that large of an engine.

yep.... 585ci

4.5b x 4.6s = 585 cubes

fox331 wrote:The Comp HUC marine roller series of hydraulic roller lobes maxes out at 270 @.050 duration and just over .700" lift .  If I can get a peak even at 6000 rpm I would consider it a success with a low maintenance valvetrain and pump gas.

Are you stuck on a hydro roller? I think another good option although more expensive would be a street oriented solid roller cam with bushed solid roller lifter if you are worried about the roller bearing failing.

In order to get it to peak 6000-6300 your will need 270*+@.050" more than likely, the tunnel ram might help carry the peak for a couple hundred rpm's.

bbf-falcon wrote:Fox331,
Just buy Dave's engine,it's been proven already. AND,you can see it in PHR this month.

I saw that. Dave was the "Horsepower and Torque King"    They also mentioned rmcomprandy's budget Mopar making some serious steam.

windsor wrote:Rick - Dave says he's gonna run the 572 he built for EMC in his dragster. (That's the last I read on the subject anyhow).

Dave - I'm wondering why not go with the a460s to begin with?  Especially with the room available in an f100....   I know you did very well with the p51s though.

This is pretty much my goal (hoping for at least a streetable 800) with about 50 more cubes and a460s.

It will probably do another round of emc duty before it makes in in the mustang. Thinking about doing it again this year. 

Street driving and high velocity ports work very well, it's about acceleration and being able to use a street friendly convertor IMO. 

A460 heads are awesome but the tunnel ram and a460 heads are better for more race oriented stuff IMO. Not      that they won't work, but in a heavy street truck with a tight convertor and street friendly gearing  I'd be willing      to bet the p51 head would run faster red light to red light. Don't forget that the a460 head and tunnel ram are pretty heavy too and you'll need to make quite of bit more power to make up for the weight.

A lot can be done with a solid flat tappet IMO. I'm happy with my performance so far and the reliability has been very good with tons of street miles. I bought the 514 shortblock from you btw

My calculator says 4.6 bore x 4.5 stroke is a 598? My first successful Drag Week engine was a 4.530 bore x 4.5 stroke 11:1, 2.35 intake valve A head motor with the low profile Ford Motorsport manifold and 1050 King Demon. With a 266/272 RX lobe cam on a 112 lobe step it made 820 @'6700. With a narrower 109 lobe step, same lobes and the tall later version A460 it was closer to 870@6500. Those changes alone along with an EFI conversion picked up an average of almost 4 tenths. The heads and manifold were 'rubbed on ' by Charlie Evans.

More recently we stepped it up a bit with Lem's updated port program on set of the 3X TFS A heads and a Wilson Manifolds ported tunnel ram. The jumped a bit too, Rev Drag Race intake, XCX exhaust 282/294 on a 113, made 1014 at 11.86:1. All of these are pump gas deals.

I'm going to build a 4.6x4.5 for the older heads and manifold and a hydraulic roller with similar lobes to the second build. Looking for that 800 number as well.

CDMBill wrote:My calculator says 4.6 bore x 4.5 stroke is a 598? My first successful Drag Week engine was a 4.530 bore x 4.5 stroke 11:1, 2.35 intake valve A head motor with the low profile Ford Motorsport manifold and 1050 King Demon. With a 266/272 RX lobe cam on a 112 lobe step it made 820 @'6700. With a narrower 109 lobe step, same lobes and the tall later version A460 it was closer to 870@6500. Those changes alone along with an EFI conversion picked up an average of almost 4 tenths. The heads and manifold were 'rubbed on ' by Charlie Evans.

More recently we stepped it up a bit with Lem's updated port program on set of the 3X TFS A heads and a Wilson Manifolds ported tunnel ram. The jumped a bit too, Rev Drag Race intake, XCX exhaust 282/294 on a 113, made 1014 at 11.86:1. All of these are pump gas deals.

I'm  going to build a 4.6x4.5 for the older heads and manifold and a hydraulic roller with similar lobes to the second build. Looking for that 800 number as well.

Me likey.

bigblok2000ranger wrote:

fox331 wrote:The Comp HUC marine roller series of hydraulic roller lobes maxes out at 270 @.050 duration and just over .700" lift .  If I can get a peak even at 6000 rpm I would consider it a success with a low maintenance valvetrain and pump gas.

Are you stuck on a hydro roller? I think another good option although more expensive would be a street oriented solid roller cam with bushed solid roller lifter if you are worried about the roller bearing failing.

In order to get it to peak 6000-6300 your will need 270*+@.050" more than likely, the tunnel ram might help carry the peak for a couple hundred rpm's.

ERIC, STOP