572 P-51 headed build...

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Post  jbozzelle on March 2nd 2019, 1:19 pm

Well all my years of collecting useless car parts has finally paid off.  I had to reduce the size of my parts collection significantly since I was moving to another smaller shop at the house.  So I was able to swap, barter and sell my way into enough parts to build a nice 572 short block.  My goals are 900 hp on a conservative tune. Similar build to what psfracer built years ago except with a little less compression. His combo hit 920 hp with a nitrous cam.

List of parts is below.  I'm building this short block and swapping the top end off of my 514 onto it without any other changes.  Hoping to have it together to run at the race in Kentucky in June.  Let me know your thoughts.

A460 block, 4.5 bore
Scat 4.5 forged crank and 6.7 rods from Adney Brown
Diamond flat top pistons 4.5 bore
Kaase P-51 heads, unported.  I'll check the spring pressures and valves myself.  These heads only have 12-18 passes on them.
Solid roller spec'd by Blake Cartwright
Morel lifters
Comp rockers
TFS Mafia intake
Holley HP 1050 carb, 8896-1 model number
2.125" front exit headers for my Fox Body Mustang.

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Post  dfree383 on March 3rd 2019, 11:50 am

Get some!
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Post  jbozzelle on March 3rd 2019, 12:07 pm

dfree383 wrote:Get some!

Planning on it! This will be the icing on the cake for the Mustang. After that if I upgrade again it'll be to a better chassis...

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Post  cool40 on March 3rd 2019, 12:20 pm

That should be a very solid piece and last as long as you want to run it. Be ready to tweak on the chassis a little with the new power.
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Post  jbozzelle on March 3rd 2019, 12:38 pm

I haven't even finished sorting the chassis from the maiden voyage at US60 last year. I'm glad I upgraded the four link bars last year when we were setting up the chassis a few weeks before the race.

Just need to send the converter back to PTC and assemble the shortblock when the parts come in. The 514 comes out this week, gets stripped down to the shortblock and gets put up for sale.

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Post  Lem Evans on March 3rd 2019, 2:06 pm

Which Comp rockers do u have?

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Post  jbozzelle on March 4th 2019, 3:06 pm

Lem Evans wrote:Which Comp rockers do u have?

ULTRA PRO MAGNUM™️ XD

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Post  jbozzelle on March 4th 2019, 3:08 pm

DP

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Post  Lem Evans on March 4th 2019, 6:29 pm

jbozzelle wrote:
Lem Evans wrote:Which Comp rockers do u have?

ULTRA PRO MAGNUM™️ XD

The XD is a good fit for the P51 stuff.

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Post  Lem Evans on March 4th 2019, 6:29 pm

jbozzelle wrote:
Lem Evans wrote:Which Comp rockers do u have?

ULTRA PRO MAGNUM™️ XD

The XD is a good fit for the P51 stuff.

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Post  kjett on March 5th 2019, 8:54 am

It all sounds solid except the carb just seems a little too small for that motor. Would think it would breathe better and help make a little more with a larger carb. Nice job on the trade deals though!
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Post  Lem Evans on March 5th 2019, 10:34 am

kjett wrote:It all sounds solid except the carb just seems a little too small for that motor. Would think it would breathe better and help make a little more with a larger carb. Nice job on the trade deals though!

Yep, It'd love a bigger carb.

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Post  jbozzelle on March 5th 2019, 11:52 am

Was thinking of a 1250 but have gotten mixed reviews...

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Post  Lem Evans on March 5th 2019, 3:31 pm

A 1250 is not too big.

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Post  kjett on March 5th 2019, 4:17 pm

Lem Evans wrote:A 1250 is not too big.

^^^This Wink
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Post  Lem Evans on March 5th 2019, 8:41 pm

The serial number is stamped on the lug at #1 cylinder near the deck.

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Post  maverick532 on March 28th 2019, 7:37 pm

I have built pretty much the same engine ,mine has eagle crank and rods,Lem spec'd solid roller , I have a 1250
Quick Fuel carb on mine , Just trying to finish what has turned into a very long project , looking forward to making passes in it this year , anyways just in running engine in car I can already tell engine is happy with carb . Btw my P51 heads are untouched . Interested in how yours works out . Give me a shout on that 514 I might be interested in that for my other 2 projects going on .
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Post  jbozzelle on April 1st 2019, 11:55 am

Crank and rods should be here this week from Adney Brown at Performance Crank. He called Friday and said the crank didn't need any mallory to balance.

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