580 build P-51 build ideas

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580 build P-51 build ideas

Post  cobra501 on September 22nd 2016, 9:20 am

I'm the luckiest guy today. I purchaced a A460 block P-51 deal yesterday and I am just stocked. Now that I have a real motor I'm looking for a good street build pump gas engine combos or just some advice before I buy a bunch of unneeded parts. This is what I have. A460 block 4.5 bore but needs probably another .030 to clean it up. Steel 4.5 crank manufacturer unknown. Mains need turning. Rods and pistons I will replace. P-51 heads with one combust chamber damaged by broke valve but will clean up. Kaasse oilpump. This is probably my last engine build so I want to do it right the first time. I'm looking for max hp on pump gas and reliability if that's possible. Any ideas suggestions welcome please.
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Re: 580 build P-51 build ideas

Post  jbozzelle on September 22nd 2016, 9:41 am

Go dig around in the build section and read up on Blake's 580" P-51 headed combo. Made over 1,000HP on race gas. That could give you some ideas on what you could do with lower compression...

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Re: 580 build P-51 build ideas

Post  dfree383 on September 22nd 2016, 10:37 am

Me and Oakley did that 572 for the EMC there is an artical in Hot Rod magazine outlining it.
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Re: 580 build P-51 build ideas

Post  cobra501 on September 22nd 2016, 10:51 am

Thanks . Might be something I can try to duplicate.
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Re: 580 build P-51 build ideas

Post  68formalGT on September 22nd 2016, 1:43 pm

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Re: 580 build P-51 build ideas

Post  rmcomprandy on September 22nd 2016, 9:56 pm

cobra501 wrote:I'm the luckiest guy today. I purchaced a A460 block P-51 deal yesterday and I am just stocked. Now that I have a real motor I'm looking for a good street build pump gas engine combos or just some advice before I buy a bunch of unneeded parts. This is what I have. A460 block 4.5 bore but needs probably another .030 to clean it up. Steel 4.5 crank manufacturer unknown. Mains need turning. Rods and pistons I will replace. P-51 heads with one combust chamber damaged by broke valve but will clean up. Kaasse oilpump. This is probably my last engine build so I want to do it right the first time. I'm looking for max hp on pump gas and reliability if that's possible. Any ideas suggestions welcome please.

I am going to make the guess that these are not new parts.

After inspection ... what good parts remain will pretty much make most of your build decisions for you.

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Re: 580 build P-51 build ideas

Post  cobra501 on September 23rd 2016, 9:00 am

Nope. Everything used . One of the heads dropped a valve but looking at it this morning I was able to fish it out by hand. Seat will need replacing and a little creative welding to fill the voids. Block look real good. Crank rod journals need turned. Can't identify the many on it. I would like to know if it's forged or billet. This engine was one of two owned by Geano who is a member here. If no one knows Mr. Gean he has passed on . He blessed me with the 572 and another friend with the 530 ci.
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Re: 580 build P-51 build ideas

Post  Dave De on September 26th 2016, 11:25 pm

I have a P-51 head 580 in a ProStreet Mustang that runs 9.15's in average air and is street driven. It is an E85 package with a baby roller cam. Not set to kill like Blakes. The car runs at the track with a full exhaust and has been reliable. What would you like to know?
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Re: 580 build P-51 build ideas

Post  cobra501 on September 27th 2016, 6:32 pm

I just would like to get the biggest bang for my buck. I wanna make the best out of these parts because after this build I think I will be done with building projects and want to just play with them. I do have a question though. What is the advantage of Q85 over pump gas? Q85 is not really avail to us in South Alabama that I know of. Havent looked either. I can get 98 octane fuel locally for about a buck more than regular pump gas.
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Re: 580 build P-51 build ideas

Post  Dave De on September 27th 2016, 7:09 pm

There isnt Q85 fuel that I'm aware of. I am running E85 and in the midwest its available. E85 is 85% ethanol and 15% gasoline. It is equivalent to 105 octane so you can increase the compression ratio to as high as 14 to 1.
You mention pump gas and all I can think of is low compression and stinky unburnt exhaust. Is this a race car or is it going to be street driven?
If its a race car people use pump gas for cost but why not use methanol at $1.40/gallon by the drum especially if E85 is not available.
If its a street driven build and gas is the only option then you will be limited.
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Re: 580 build P-51 build ideas

Post  cobra501 on September 27th 2016, 7:37 pm

E85 my bad. I knew the Q didn't look right. This is a street car. It may see the track however we are plagued with 1/8 mile tracks. I like the 1/4 mile .
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Re: 580 build P-51 build ideas

Post  Dave De on September 27th 2016, 8:44 pm

Okay with 93 octane it will limit the capabilities but being street traction limited this is what I would do.
Keep compression to 10.5 to 11.0 and have a known builder on this site grind a flat tappet solid cam. Victor or track heat manifold with a 1250 Dominator.
This engine can make good power and be reliable for street use.
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Re: 580 build P-51 build ideas

Post  jbozzelle on September 28th 2016, 8:34 am

Are you near Mobile? If so, does Mobile Dragway sell race fuel?  I know the fuel guy at Gulfport Dragway can get E85.

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E-85

Post  IDT-572 on September 28th 2016, 6:09 pm

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Re: 580 build P-51 build ideas

Post  cobra501 on September 28th 2016, 8:42 pm

I'm not sure if they sell fuel . Mobile is not much of a drag strip these days. 60 foot short of a 1/8 mile do to limited stopping distance. Atmore seems to be the place to race but again 1/8 mile track. I don't mind the short tracks but if your gonna run a street car then be prepared to swap gears . Not for me. I did research E85 today on my phone and it looks like a few stations are selling it. I am going to check that out. for now I am gonna research E85 builds as well and check my limitations. Thanks
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Re: 580 build P-51 build ideas

Post  stanger68 on October 3rd 2016, 10:18 pm

i was considering a e-85 build a while back. go to the app store on your phone and download a gas locator app. it takes all the work out of figuring out who has it.

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Re: 580 build P-51 build ideas

Post  old blue on October 7th 2016, 11:40 am

Man id contact phillip oakly or lem evan and eighther of them will be able to help you with everything, parts or advice
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Re: 580 build P-51 build ideas

Post  cobra501 on October 7th 2016, 6:20 pm

I plan on that for sure. I want the biggest bang for my buck. This is gonna be a fun build. I am currently doing some renovations done in my shop to get the 66 F-100 in there. thanks everyone for your help.
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Re: 580 build P-51 build ideas

Post  Straubtech on October 8th 2016, 1:14 pm

Put a set of 2.300" intake valves in her if staying 580CID

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