http://www.youtube.com/watch?v=ju8GAQC2DDA

10.2 to 1 dyno'd with 91 Octane
AFR 325's
Hyd Roller w/Morel Solid rollers
660's x 2
710HP @ 6100

662#/ft @5100


Build was with an Eagle Crank, Eagle rods and JE pistons. Customer has about $10K in the project.

That is so cool! That is a lot of power from that cubic inches with a hydraulic cam. Very inspirating....:thumbsup:

Wow, not even the fully CNC'd heads. Impressive.

Adam

I'll understand if you don't want to say, but can you give the ballpark specs on the cam used to get those numbers? Impressive stuff!

Thanks -
Rob

Maybe, I am going to need more carb.
Wonder how it would work with 1 big carb and no tunnel ram?
Will look nice sticking out the top of a boat though :)

I'll understand if you don't want to say, but can you give the ballpark specs on the cam used to get those numbers? Impressive stuff!

Thanks -
Rob

680/610
262/268
109

When camming an engine you creating a valve path. The path determined by the lobe area. This area includes duration at advertised, .100", .200, .300" tappet heights. To properly cam an engine you have to provide the engine the duration it needs at all these points. .050" is a marketing tool. Lobes with 262 degrees @ .050" I have access to 41 lobe profiles that have 262 @ .050. None of them are the same at adverstised, .100, .200, .300 as the lobe used in this combo.

Chris - understood. I was really just curious :) Interesting that this was a hydraulic roller grind, though, because my understanding (probably faulty) is HR cam ramp profiles are a bit less aggressive than SR cams, and therefore have less duration at a given tappet height, despite similar 0.050 numbers, no?

My impression was that the resulting combo of HR cam with SR lifters was a bit of a compromise in favor of valvetrain longevity, but the numbers you have are definitely great.

Thanks!
Rob

Chris - understood. I was really just curious :) Interesting that this was a hydraulic roller grind, though, because my understanding (probably faulty) is HR cam ramp profiles are a bit less aggressive than SR cams, and therefore have less duration at a given tappet height, despite similar 0.050 numbers, no?

My impression was that the resulting combo of HR cam with SR lifters was a bit of a compromise in favor of valvetrain longevity, but the numbers you have are definitely great.

Thanks!
Rob

The HR lobes will be "softer". Marine application this engine will run constantly above 3500 for most of its life with some wide open runs of 5800 to 6100 rpm as long as the guy has lake. So your correct about the longevity. What the customer wanted was something with some life span, but would hit 700HP at around the 6300 mark. The lobes selected were the "area" needed to accomplish this. Int this case the use of HR lobe and mechanical lash lifter would work.

Whats the advantage of running HR cam with SR rollers? Sorry for the ignorance. I'm coming from flat tappet and what to build a nice 540 street motor with 650-700hp. I don't really want the hassle with adjusting the lifters as SR are known for having.

Thanks.

Whats the advantage of running HR cam with SR rollers? Sorry for the ignorance. I'm coming from flat tappet and what to build a nice 540 street motor with 650-700hp. I don't really want the hassle with adjusting the lifters as SR are known for having.

Thanks.

Cost effective
Less maintenance

For the enthusist that has some good basic knowledge and wants minimum wrenching time these set ups work well. Hyd roller lifters are expensive so you do save some money running the solid roller. Now in this customers case he did choose the Morel Ultra Pros so the money difference did not play a part.

This combo the lobe area needed was well within reason of a hyd roller profile so it worked well.

That is cool! And impressive!

Chris, That looks like Shawns(FOURQ) 496 build. If it is, he is sure happy with your cam:yes: .

While, we have your attention on this thread, I have a couple of quick questions. I just bought a Merlin 9.8 block and am going to build a pump gas 572 on it for my Camaro. Im wanting to run one of your hyd roller grinds. Mike L flowed the heads I plan to use, so I have flow numbers.

What is the best way to contact you in a few weeks when I get ready to order a cam, and what all info will you need?

Thanks, Scott

Chris/all - on the subject of solid roller lifters with hydraulic grinds - I assume the valve comes on and off the seat faster with the SR lifter. Does that have any perceptible effect on the low-end of the power curve (say if you ran that setup on the street)? Crisper off-throttle response than a comparable hydraulic lifter?

Chris, That looks like Shawns(FOURQ) 496 build. If it is, he is sure happy with your cam:yes: .

While, we have your attention on this thread, I have a couple of quick questions. I just bought a Merlin 9.8 block and am going to build a pump gas 572 on it for my Camaro. Im wanting to run one of your hyd roller grinds. Mike L flowed the heads I plan to use, so I have flow numbers.

What is the best way to contact you in a few weeks when I get ready to order a cam, and what all info will you need?

Thanks, Scott

Scott,
It is. His brothers 547CID goes to the dyno in May. Looking forward to those results.

You can reach me from 8:30am to 7PM Mon. Friday at 423 854 0007.

Chris/all - on the subject of solid roller lifters with hydraulic grinds - I assume the valve comes on and off the seat faster with the SR lifter. Does that have any perceptible effect on the low-end of the power curve (say if you ran that setup on the street)? Crisper off-throttle response than a comparable hydraulic lifter?

Yes it will be crisper and a bit deeper in exhaust note then as compared to running hyd roller lifters.