572 CID - Stock Kaase P51 heads

Here is the specifics on my build.

First the parts list:

A460 block 4.500 bore
Eagle 4340 4.500 stroke crankshaft
Eagle 6.700 H-Beam rods with ARP L-19 rod bolts
Diamond Pistons with a 12 CC dome --- worked out to be 16.2 to 1 compression with the P51 heads with 72cc chamber
Kaase P51 heads, completely stock and unported. I wanted to see how far I could push these right out of the box.
T&D shaft mount rocker arms
Comp Cams solid roller--intake 282 @ .050, .773 lift --- exhaust 296 @ .050, .749 lift --- 112 lobe center. Cam for small nitrous shot.
Manley Nextex springs with 316lbs on the seat, 1036 lbs open, installed height 2.100, coil bind at 1.200.
Titanium retainers
TFS intake
Carb Shop Dominator 1050
Moroso sheet metal valve covers (these are really nice)
Moroso vacuum pump set up
MSD Pro Billet distributor (small cap--large cap would not clear water neck area of intake manifold)
MSD Crank Trigger ignition
Danny Bee belt drive
ATI Harmonic Balancer
Moroso 8 qt drag race pan

Here are some pictures:

















So far, after 1 dyno session that was cut short (only 7 pulls on a brand new, started for the first time motor), we ended up with 895 hp @ 6700 rpm. Timing was at 33 degrees, jetting was 92 on all 4 corners, A/F at 13.1 to 1.

Next Tuesday its going back on the dyno where we will break in the motor more, play with the cam timing, and take the engine up to 7500 rpm. Hopefully I will be able to post up a 920 number!

Here is the video http://www.youtube.com/watch?v=C0sjhgUEOuc


LESSONS: probably should have went with a larger camshaft--all though I might have different data next Tuesday as we will try retarding the camshaft by 2 degrees. A larger camshaft along with fully ported P51s will be next time. The engine could probably use a larger carb also.

What kind of vacuum #'s did it pull on the dyno? What are the pump and mandrel pulley sizes? I'm trying to decide on which pump I want for my build.

richter69 wrote:wondered how long it would take for you to migrate over to the "better" site..............

David Cole wrote:What kind of vacuum #'s did it pull on the dyno? What are the pump and mandrel pulley sizes? I'm trying to decide on which pump I want for my build.

We only had it on 7.5 inches of vacuum and it was worth 18 hp vs the previous pull where the only difference was the pump was not hooked up. I have that regulator piece that comes off of the valve cover that you can change how much vacuum it pulls.

I took a picture of all of the parts, you can look at all of the part #s and hopefully that will help you--but the pulleys I used can pull more vacuum--we just started small on the vacuum. On the pull before we hooked it up, oil pressure was 77 psi at 6500. Then we hooked it up and oil pressure dropped to 70 psi at 6500 rpm. We might creep up to 10 inches of vacuum, but I don't see us running any more then that.



Of note is the drive--even though its for a BBF, I had to return it and get one for a BBC as the ATI Balancer I had was set up for a BBC drive

very nice build Paul ...... cant wait to see the car run

Nice Good job

I'm going to dyno one real soon too, hopefully next Saturday. Not as big as your's tho

Good Job !!

Darn good #'s at respecable rpm's especially when this is mostly a bolt together deal with off the shelf parts. I would guess that the HP/$ is a relatively livable amount too. Don't get me wrong, this isn't a $5k crate engine, but for someone wanting this level of HP the $$'s invested would rival any brand for bang for the buck, and beat the pants off of most.

schmitty wrote:Darn good #'s at respecable rpm's especially when this is mostly a bolt together deal with off the shelf parts. I would guess that the HP/$ is a relatively livable amount too. Don't get me wrong, this isn't a $5k crate engine, but for someone wanting this level of HP the $$'s invested would rival any brand for bang for the buck, and beat the pants off of most.

Agreed. Those #'s are impressive for unported heads, although you seem to have all of the other bases covered to make your combo very optimized for what you have in it.
Nice job, can't wait to see the results after some tweaking.





Doug...

Tweaking is tomorrow! Will report any interesting findings of course.

Down the road when I refresh the motor, go with a bigger cam, and port the heads, it will be interesting to see what that would be worth hp wise.

In any case hopefully this thing will be around 920 hp by this time tomorrow. We will see.

This is what my 514 will grow up to be one day.

Pretty impressive numbers for out of the box heads...

Final numbers 924hp @ 6900 rpm / 781 ft-lbs tq @ 5000 rpm, all motor.

Since I went too small on the cam we retarded it 2 degrees and picked up power. Add synthetic oil, and dropped total timing to 30 degrees.

Interesting that when we tried 28 degrees total timing the difference was only 4 hp peak power and 3 hp on the average.

I will post up video and dyno sheets when I get home.

Special thanks to Vrbancic Bros Racing---they are an outstanding builder. Thanks also to Kaase and his P51 cylinder head design. 924 hp from out of the box, stock p51s.

very impressive sir ...props to all involved

Deal!
Sounds like it wanted 29*. Retarded 2*.......from 2* advanced or from straight up?

2 degrees retarded from straight up.