Time for another guess the horsepower game....

[blykins]

Got pushrods on the way, but should have this one buttoned up this week, hopefully to dyno next week.

Rules are the usual.....closest guess to corrected horsepower without going over wins some goodies.

*4.090" finished bore size, 4.250" stroke
*Scat 9000 series 4.250" crankshaft
*Scat 6.700" I-beam connecting rods
*Mahle pistons, 18cc dish, 1mm/1mm/2mm ring pack, 10.3:1 compression ratio
*Trick Flow cylinder heads, no tampering, dual valve springs, 150/400 spring pressure
*Performer RPM intake with some cartridge roll in the port openings, divider cut down
*Melling HV oil pump
*Canton 15-850 pan, deep front sump with oil control
*MSD distributor
*Powerbond balancer
*Harland Sharp shafts with Precision Oil Pumps end stands, center stands, and spacers
*Lykins Motorsports non-adjustable roller rocker arms
*Trend 5/16" .105" pushrods
*One of my custom hydraulic rollers, 231/239 @ .050", 114 LSA, 105 ICL, .630" lift
*Morel standard travel hydraulic roller lifters
*Quick Fuel HR-780 carburetor
*Tuff Stuff aluminum water pump

No front end dress on this one, so we will not be turning the water pump or any accessories on the dyno. 

Happy guessing!

[HarleyJack17]

Curious to see this one! Think I may be a little conservative. My # is corrected HP-Edited for later post inquiring.

537 HP

[Joe-JDC]

639 hp     Joe-JDC

[blykins]

639 hp     Joe-JDC

Joe, I think you fat-fingered a number there. 

[Joe-JDC]

447 cubic inches x 1.43 hp/ci for that compression ratio is not out of reason, and if the heads flow 310 cfm at .630" lift, that is in the ball park for horsepower potential.  The ring pack is optimal, and roller lifters, etc., all should be low resistance.  The only issue is the smallish carb and header choice for the pull.  I am not a fan of cutting the divider down, and a 2" super sucker would be standing by, so I may be a little optimistic, but not by much.  Joe-JDC

[blykins]

447 cubic inches x 1.43 hp/ci for that compression ratio is not out of reason, and if the heads flow 310 cfm at .630" lift, that is in the ball park for horsepower potential.  The ring pack is optimal, and roller lifters, etc., all should be low resistance.  The only issue is the smallish carb and header choice for the pull.  I am not a fan of cutting the divider down, and a 2" super sucker would be standing by, so I may be a little optimistic, but not by much.  Joe-JDC

The heads actually go about 330 at that lift.  However, FE's typically don't go 1.43 hp/ci in street form.  Not on this dyno anyway. 

Smallish cam because the guy needed lots of vacuum.  Pretty mild build all around.   I think you're gonna be off by about 100 hp. 

[1968galaxie]

Hello Brent,

Any particular reason for the 123 degree ECL?
That very very early exhaust opening with that ECL will result in torque loss.
I guess that might be the trade off for high vacuum requirement the customer has?

Anyhow - I love these builds.
Is the HP guess un corrected? Or corrected?

[shady]

508

[blykins]

That very very early exhaust opening with that ECL will result in torque loss.

Eh.....I wouldn't put a bet on that one. 

I don't know how you would even make any kind of correlation there without knowing the advertised durations.   I could put a more aggressive lobe on the exhaust side and delay the exhaust valve opening.   I give you props on being able to calculate the ECL by using the ICL and the LSA, but it's really meaningless.

[TomP]

If they are all over will I win guessing 1HP?

If not I guess 499.

[T U Bar]

522

[My427stang]

548 HP, and I will add an additional guess, 554 for torque

[Gaugster]

533HP

[475fetoploader]

What is 561 horsepower Alex

[wowens]

558