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View Full Version : Dyno Results in 461 cu. in.



Philip47
09-27-2002, 03:57 PM
461 cu. in, Gen IV 454 4 bolt mains
Fully machined, Bal & Blu
Eagle H beam rods & Forged Crank
Comp Cams custom Hyd Roller Cam, Rev kit
Crane roller 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 5,200 - 5,300 RPM range

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

Built & Dyno'd By Bruce Baker of Express Engines dyno'd at Keith Eikerts Facility

DS88
09-27-2002, 06:49 PM
Boat should be an animal. What kind of lift and duration figures on the cam?

Thanks,

Dave

Philip47
09-27-2002, 06:58 PM
just got Fax'd the Dyno sheet the specs will arrive with the engine next week, will post then

RickR
09-27-2002, 08:44 PM
Awesome ###s :D
Was the engine dynoed with Gils? If so which risers do you have (Offshore? Mag Choice?)??
I am also curious about the cam.

Philip47
09-27-2002, 09:03 PM
It was dyno'd with the Gill's, they are
Wet Offshore manifolds, don't have the cam spec's yet as all they Fax'd was the dyno sheet at this point, the drive train is all Crane Hyd roller, will post spec's when they arrrive

BigGrizzly
09-28-2002, 01:21 AM
That sounds like a good durable motor, and should live a long time. My experience is the 5200 Rpm is the way to go. Especially with your torque curve. I'm not suprised about the smaller carb being better. My blower motor uses a 825 CFM, and my #51 Clevland likes the ^00 CFM better than the 750 CFM. I bet the torque curve suffered the most. I have found that most people over carbureate their engines.