A-head 547

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

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?

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

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.  

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.

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?

Bore the block, it's a bunch of power. And the a460 stuff has plenty of rebuilds left at that bore.

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.

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

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?

You need pistons and rings either was it's not expensive to go the additional .100 over it's done all the time.

I bored mine 4.640 I hope it lives in know a guy said he has been 4.670 in a pull truck

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)   

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

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 # ?

1050.... or MORE:lol:

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 ?

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.

so what did it make on the dyno?

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.

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

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.

was that on spray? more about the combo!