557 build A-heads

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557 build A-heads

Post  557ranger on January 28th 2014, 12:08 am

My first big motor build
Dova-a block
4.5 Bryant crank used
Oliver rods used
Diamond flat pistons
Ford motorsport A-heads 2.40 intake valves. Max flow somewhere in 420
Heads milled to 62cc's. .60 head gaskets comp should be in mid 14
1150 carb
New style trickflow intake
solid roller cam. .726 int .692 exhaust can get rest of #'s
Going run 2 1/4 headers
what's everyones thoughts on hp/ torque?

Motor is going in bog truck dana 60's front and rear with 4.88 gears and bw 1356 will be running 39.5 boggers also 4-linked rear and front 97 ranger on Toyota frame. Thanks for any help.


Last edited by 557ranger on January 28th 2014, 11:36 am; edited 1 time in total (Reason for editing : right #)
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Re: 557 build A-heads

Post  the Coug on January 28th 2014, 12:17 am

557ranger wrote:My first big motor build
Dova-a block
4.5 Bryant crank used
Oliver rods used
Diamond flat pistons
Ford motorsport A-heads 2.40 intake valves. Max flow somewhere in 420
Heads milled to 62cc's. .60 head gaskets comp should be in mid 14
1150 carb
New style trickflow intake
solid roller cam. .722 int .696 exhaust can get rest of #'s
Going run 2 1/4 headers
what's everyones thoughts on hp/ torque?

Motor is going in bog truck dana 60's front and rear with 4.88 gears and bw 1356 will be running 39.5 boggers also 4-linked rear and front 97 ranger on Toyota frame.    Thanks for any help.





I have a question why would you mill the heads to 62cc and then put .060 head gaskets to get 14 to 1 comp? Why not figure your chamber volume to not mill them that much? and use a .030 head gasket? Seems like a less expensive way...
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Re: 557 build A-heads

Post  557ranger on January 28th 2014, 12:20 am

Heads were already milled bought used
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Re: 557 build A-heads

Post  powerstrokeace on January 28th 2014, 12:33 am

557ranger wrote:My first big motor build
Dova-a block
4.5 Bryant crank used
Oliver rods used
Diamond flat pistons
Ford motorsport A-heads 2.40 intake valves. Max flow somewhere in 420
Heads milled to 62cc's. .60 head gaskets comp should be in mid 14
1150 carb
New style trickflow intake
solid roller cam. .722 int .696 exhaust can get rest of #'s
Going run 2 1/4 headers
what's everyones thoughts on hp/ torque?

Motor is going in bog truck dana 60's front and rear with 4.88 gears and bw 1356 will be running 39.5 boggers also 4-linked rear and front 97 ranger on Toyota frame.    Thanks for any help.

First thing i see is check with phillip or lem or dfree or charlie as i not sure if the 2.400 valve will clear a 4.440 bore block ( i could be wrong)
next with the head being milled that much i'm guessing that's in the area of .150 milled of the heads. You need to know if the intake side was milled to match for the intake to fit . Other wise you will have to mill an intake that will be married to that head for the rest of its life.
I've have been told for a motor under 572 or even under 598 the new style mainfold will gain you nothing.
the cam should be spec'ed out for this bore,stroke head cobonation and not just something on the shelf, alot has to due with lobe separation and centerline and duration not just lift numbers.
I know as i got schooled on this as well, I have a cam spec'ed out for a 555 motor and I too am building 557 like yours and asked if the cam would work. I was was told a big bore short stroke does not breath the same as small bore big stroke combonation and need something different.

Ace
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Re: 557 build A-heads

Post  Darrin Gorham on January 28th 2014, 12:54 am

I would (did) call Lem Evans and have him spec a cam. I think you are leaving a lot on the table with that one.

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Re: 557 build A-heads

Post  557ranger on January 28th 2014, 12:55 am

Intake was milled but came as a package deal with heads. Cam I believe is leaving a lot on the table but am not against getting a custom grind. As far as valve clearance the motor is assembled now but I believe some machine work was done at top of cylinders to clear not 100% on that.
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Re: 557 build A-heads

Post  dirt_worker on January 28th 2014, 10:09 am

Since everybody else has critiqued your build ill go ahead and answer you question...

Id say it should make 900-950hp and 750-800 tq.
My pumpgas 557 made 905hp and 740tq.

As already stated though... make sure the 2.40 valve clears the bore.
Mine has 2.350's and the flow really suffers on the small 4.44 bore.

Here's mine:
http://www.429-460.com/t14610-dyno-results-a-headed-557-on-91-octane-pump-gas
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Re: 557 build A-heads

Post  557ranger on January 28th 2014, 11:41 am

Here's the cam #'s
intake lift. 726
Ext. Lift. 692
Duration @.050. Intake. 276
Exhaust. 280
110 lobe separation

Again I understand cam is not right will be replacing in the future. Thanks for all the input just want a rough idea of what this will make!!
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Re: 557 build A-heads

Post  bbf-falcon on January 28th 2014, 9:14 pm

Listen too these guy's,they have answered very well imo. Very Happy 

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Re: 557 build A-heads

Post  cool40 on January 28th 2014, 10:15 pm

With that cam you'll not see the benefits of the heads.IMO.It should still make good power for what you're doing. What's with the. 060 gaskets?
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Re: 557 build A-heads

Post  Dave C. on January 28th 2014, 10:27 pm

Not sure what kinda hp it'll make but was it assembled when you bought it? If you don't know the builder I'd sure take a look inside it before I fired it up..

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Re: 557 build A-heads

Post  557ranger on January 28th 2014, 10:29 pm

Not really sure why the shop used that thickness. Maybe to keep comp below 15 like I wanted.
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Re: 557 build A-heads

Post  cool40 on January 28th 2014, 10:41 pm

Only issue i run into when i cut .100 off my A460's was valve clearance. Maybe they checked all that out good. If you do change the cam make sure you check it!
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Re: 557 build A-heads

Post  466cj on January 29th 2014, 12:21 am

Really not enough information to answer some question. Was it verified it really has a 2.40" intake valve? What size exh? I'd start by having the heads flowed on the bore size you will be using and go from there. Do you know what it was build for originally?

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Re: 557 build A-heads

Post  dirt_worker on January 29th 2014, 10:13 am

466cj wrote:Really not enough information to answer some question.

What more info do need?
Aheads will make 800+ hp falling off a log. His cam isn't really that out to lunch imo...light on lift but the lobe sep and duration doesn't look terrible to me.
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Re: 557 build A-heads

Post  557ranger on January 29th 2014, 12:50 pm

2.40 intake 1.88 exhaust
flow #'s from. 500 up to. 900
Intake. Exhaust
377. 262
401. 287
415. 302
420. 313
427. 318

Not sure what bore was used..
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Re: 557 build A-heads

Post  IDT-572 on January 29th 2014, 3:43 pm

557ranger wrote:2.40 intake 1.88 exhaust
flow #'s from. 500 up to. 900
Intake.     Exhaust
377.         262
401.         287
415.         302
420.         313
427.         318

Not sure what bore was used..

Must have been on a small bore............ the numbers are short for a 2.400 valve deal.
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Re: 557 build A-heads

Post  69bluehotrod on January 29th 2014, 6:51 pm

557ranger wrote:2.40 intake 1.88 exhaust
flow #'s from. 500 up to. 900
Intake.     Exhaust
377.         262
401.         287
415.         302
420.         313
427.         318

Not sure what bore was used..

Dont want to hurt your feelings but that dont sound right if its got a 2.400 intake valve.
agree with Blake, must be flowing those with a little bore.
My Power port 325's are close to those #'s (5-800)

Cam as you already said is too small , although it will work...
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Re: 557 build A-heads

Post  norm on January 29th 2014, 6:57 pm

These are Motorsport A heads. Aren't they down a bit flow wise compared to a more modern A head? Trickflow, idt etc.
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Re: 557 build A-heads

Post  c.evans on January 29th 2014, 9:58 pm

norm wrote:These are Motorsport A heads. Aren't they down a bit flow wise compared to a more modern A head? Trickflow, idt etc.

Yes they are down a bit, but they should be busting 440 cfm pretty easy if they are ported. 442 cfm is where we were in 2001-2002.

Charlie

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Re: 557 build A-heads

Post  557ranger on January 29th 2014, 10:05 pm

Well all in all I think I will be happy with the outcome got to be better than the 466 I had. Plus I don't have all that much wrapped up in this motor.
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Re: 557 build A-heads

Post  cool40 on January 29th 2014, 10:19 pm

557ranger wrote:Well all in all I think I will be happy with the outcome got to be better than the 466 I had. Plus I don't have all that much wrapped up in this motor.
you'll be more than happy with it! it should work good for your intended use.  Cool 
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Re: 557 build A-heads

Post  Lem Evans on January 29th 2014, 10:38 pm

c.evans wrote:
norm wrote:These are Motorsport A heads. Aren't they down a bit flow wise compared to a more modern A head? Trickflow, idt etc.

Yes they are down a bit, but they should be busting 440 cfm pretty easy if they are ported. 442 cfm is where we were in 2001-2002.

Charlie

445 was were I was in 1989.

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Re: 557 build A-heads

Post  Lem Evans on January 29th 2014, 10:45 pm

IDT-572 wrote:
557ranger wrote:2.40 intake 1.88 exhaust
flow #'s from. 500 up to. 900
Intake.     Exhaust
377.         262
401.         287
415.         302
420.         313
427.         318

Not sure what bore was used..

Must have been on a small bore............ the numbers are short for a 2.400 valve deal.


I'm not sure the bore is the biggest deal. Most of that old school stuff seems to have seen a big valve and had porting thing that would only susport a 2.300" valve.

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Re: 557 build A-heads

Post  dirt_worker on January 29th 2014, 11:33 pm

c.evans wrote:
norm wrote:These are Motorsport A heads. Aren't they down a bit flow wise compared to a more modern A head? Trickflow, idt etc.

Yes they are down a bit, but they should be busting 440 cfm pretty easy if they are ported. 442 cfm is where we were in 2001-2002.

Charlie


Charlie, what size sleeve do you flow all your stuff on?
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