[RodKnock]

Originally Posted by Excaliber

It's a KC motor, it's almost a sure bet he has a hydraulic roller. Which is great for maximum tire smoke at low rpm,,, if that's what you want.

It would also be unlikely a motor THAT big, 510 cid, would be a high rpm motor. I'm thinking, 6,000 max, 5,800 more reasonable.


Wait, have you got that backwards? Hydraulic roller is typically lower rpm cam than a solid, and without the exotic lifters and such is generally limited to 5,800-6,000. A solid roller is a high rpm application, not likely with the MASSIVE stroke of a 510. But's it a KC motor, who knows what kind of magic he has wrought on that puppy!

Solid roller might be good for around 7,000. No way you would crank a 510 THAT high,,, would you? Man, that would be crazy!

You're kidding right? If you search the FE Forum you'll see big cubes and solid rollers:

Here's a solid roller 511ci Shelby block engine by Barry R. making 787 HP at 7,000 RPM:

http://www.network54.com/Forum/74182...dyno+pull+data

Jay Brown from the FE Forum:

"My 585" SOHC cheats this little recipe by using EFI, but it idles at around 750 RPM and runs on pump gas with 13:1 compression and 285 @ .050", with about .740" gross valve lift. Due to the differences in rocker ratio this duration at .050" is about equivalent to 273 @ .050" from a regular FE wedge cam. This engine peaks at 935 HP at 6600 RPM, but stays over 900 HP through 7500. So I think that your proposed engine would need more duration to peak around 7200 RPM in HP (although maybe not if you kept the cubes around 500). Head flow on my SOHC with the raised ports is around 450 @ .800" lift.

Jay Brown
1969 R Code Mach 1, Drag Week 2005 Winner BB/NA with 511" FE(10.60s @ 129), Drag Week 2007 Runner Up BB/PA with 490" Supercharged FE (9.35 @ 151)
1964 Ford Galaxie, Drag Week 2009 Winner Modified NA with 585" SOHC (9.50s @ 143)
1968 Shelby GT 500 Convertible, 492" 667 HP FE
2005 Ford GT, 2006 Drag Week Winner, 12.0 Daily Driver
1969 Ford Galaxie XL, 460 (Ho Hum....)"


Big cubes and high RPM's are more common than you think.

FYI, my Crower billet hydraulic roller cam can rev to 6,200+, but max HP comes at 5,800 RPM if I remember correctly.