A-head 547

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Post  sg86coupe on Wed Jul 30, 2014 9:48 pm

I've been buying for over 4 years and i'm getting close.


A-460 block new, machine work by Ted at Engine Systems
Scat Forged 4.300 crank
Scat Forged H-beams rods both from Adney
Trick Flow A-460 heads cnc ported 2.40 intake 1.88 exhaust valve job by Philip Oakley
Custom ground solid roller cam from Lem .470 intake & exhaust
Comp Cams Ultra Pro Mag XD rockers 1.8
No intake yet
1050 hp Holley dominator
no pistons yet thinking 14.5 or 15 compression

Will be going in a hard tail dragster, any guesses on power or et's

thanks Stacy



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Post  bbf-falcon on Wed Jul 30, 2014 11:16 pm

You are leaving power on the table w/carb. i understand if thats what you already have. 1250 would work better imo. Watch that big int. valve w/bore on the 547. Power should be good . Whats the weight?

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Post  dfree383 on Wed Jul 30, 2014 11:29 pm

Go 4.600 bore and make it a 572. You want the big bore with the big valves.
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Post  bbf-falcon on Thu Jul 31, 2014 12:37 am

dfree383 wrote:Go 4.600 bore and make it a 572. You want the big bore with the big valves.

xxxx2. Especially now,since you haven't bought pistons yet. Very Happy 

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Post  maverick on Thu Jul 31, 2014 7:18 am

bbf-falcon wrote:You are leaving power on the table w/carb. i understand if thats what you already have. 1250 would work better imo. Watch that big int. valve w/bore on the 547. Power should be good . Whats the weight?

dfree383 wrote:Go 4.600 bore and make it a 572. You want the big bore with the big valves.

Yessir. Big bore, big carb for big hp.
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Post  68formalGT on Thu Jul 31, 2014 8:41 am

4.5" bore with a 4.3" stroke right? Isn't the bore big enough for those valves or will he still need to notch the top of the block?
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Post  dfree383 on Thu Jul 31, 2014 9:02 am

Bore the block, it's a bunch of power. And the a460 stuff has plenty of rebuilds left at that bore.
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Post  Dark Horse of Apocalypse on Thu Jul 31, 2014 2:47 pm

Wow that outta be a Monster with 572 CID and 15:1 CR.

How large of a bore can an A-460 block have, I thought 4.6 was the limit.
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Post  dfree383 on Thu Jul 31, 2014 6:49 pm

Dark Horse of Apocalypse wrote:Wow that outta be a Monster with 572 CID and 15:1 CR.

How large of a bore can an A-460 block have, I thought 4.6 was the limit.
. Most of the are safe at 4.625 and a lot of times more
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Post  sg86coupe on Thu Jul 31, 2014 8:13 pm

Boring it that much about killed me. Will it work like this? As for carb I already have it and I think it will make more power than I was after to begin with. Any thought on how much power?

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Post  dfree383 on Thu Jul 31, 2014 8:24 pm

You need pistons and rings either was it's not expensive to go the additional .100 over it's done all the time.
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Post  larry552 on Thu Jul 31, 2014 10:02 pm

I bored mine 4.640 I hope it lives in know a guy said he has been 4.670 in a pull truck
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Post  bbf-falcon on Fri Aug 01, 2014 9:12 pm

If you have the ser # of the A460 block, call Ford Racing and they should be able to send you the sonic test for your block. (I think)  Exclamation 

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Post  sg86coupe on Fri Aug 01, 2014 11:02 pm

Really I didn't know you could do that. Another reason why I like this fourm

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Post  sg86coupe on Sat Nov 01, 2014 7:27 pm

So block was bored 4.600 15-1 compression pistons intake is the tall trick flow with only port match.
waiting to get motor back, PAR in Spartanburg SC is putting it together
does any body have an opinion on power # ?

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Post  dirt_worker on Sat Nov 01, 2014 7:53 pm

1050.... or MORE:lol:
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Post  sg86coupe on Tue Jul 21, 2015 5:29 pm

motor is finally together, chassie was 4-linked and is finally done, time to put together. What spark plugs to use for a heads in this combo ?

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Post  sg86coupe on Fri Oct 16, 2015 8:33 am

Well tomorrow is the day I finally get to race, I hope. Tried a few weeks back, to many problems never made a full pass. Our home track Greer Dragway is having their big Turkey Trot end of season race. Anyone close should come, weather looks good so there should be alot of cars.

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Post  kjett on Fri Oct 16, 2015 8:43 am

so what did it make on the dyno?
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Post  sg86coupe on Fri Oct 16, 2015 4:42 pm

Did not dyno it, wished I would have. Most of the problems that I have had would have been found then. Live and learn I guess.

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Post  bigblock t-bird on Tue Oct 20, 2015 5:39 pm

What did it run? That should be a strong engine.

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Post  sg86coupe on Tue Oct 20, 2015 9:29 pm

4.84 at 140 mph Carb is bad fat at ideal. Ordered a kit today from Holley to rebuild it. The guy at Holley said he thought my jets were to small, so I ordered 4 more. Also my water pump and fan took a dump, so lots to do before next weekend.

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Post  nitrous.f on Tue Nov 10, 2015 8:41 pm

was that on spray? more about the combo! Very Happy
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