Apache22

461 cu. in, Gen IV 454 4 bolt mains
Fully machined, Bal & Blu
Eagle H beam rods & Forged Crank
Crane Hyd Roller Cam, Rev kit & Rockers
Forged Pistons 8.8 CR
Stainless & Inconel valves
750 DP mech sec, 71 & 77 jets
Stock Rectangular Port Heads,
Dual Plane Manifold
MSD ignition
ATI Balancer
Gill Exhaust
Dyno'd #s with Accessories

RPM LBS TQ HP
3500 498.3 332.8
4000 499.7 388.3
4200 497.4 412.9
4500 486.5 416.8
4700 484.6 433.7
4900 487.0 454.4
5200 473.5 468.6
5400 469.5 477.1
5600 464.0 478.2
5800 451.1 490.0

I didn't post numbers at ever 100 RPM incremant, but this gives you a good representaion

Without Accessories made 496.4 HP & 453.1 lb TQ @ 5,800 RPM

I am very pleased, holds a nice TQ curve with good HP, this is a pretty mild motor and looks like it makes very good power. I plan to turn it in the 5,400 - 5,600 RPM range

I also sent them a new 830 Marine Holley and to my suprise the 750 made better numbers.

not a big motor by any means but in my 2,700 lb 22" Apache it should run in the 80mph range

timucin

nice numbers..
I think this is the high-end of 461 with 8.8 cr with stock heads.
have good rides with your boat...

what is your cam exactly lifts duration?

Apache22

I'll get all the engine & cam specs when deliver my engine, they just faxed my the dyno info when the finished tuning. I think i got a great engine per dollar spent.