512 with 440-1 heads. Dyno Results are in

[Wookie316]

Well. It did not make as much power as it did with the Indy EZ-1 heads but it is still pretty stout. More cubic inches and more duration and I think these numbers would be even better. Added a crank trigger and an external Milodon oil setup since the last go around.
The fuel numbers are a bit screwy. Not sure if it is because I removed the cloverleaf from the manifold. The 4 hole taper spacer. Maybe something in the carb itself. Or even maybe a combo of it all?
Had I been there the day of the dyno I would of had them check a few more things.
Regardless it should work well in the car. Looking forward to next May. Hope it holds together this time?

 

[1967coronet440]

Impressive, the old heads cracked right? Its been a while.. what was the difference in power?

 

[Tex013]

Great strong numbers . Going to have to rev it .
Still stock block ? May not hang in too long

Tex

 

[Wookie316]

Old combo peaked at 838 HP and 749 Torque.
Head is cracked. Malex epoxied it for me and it does hold. Those heads are sitting on my shelf now. Not sure what to do with them?
I knew power would be down a bit, but didn’t think 40 HP.
Only uses a 2” header on the test this time as that is how it will be in the car.
Should run 10.30-40’s in my car at my weight.
I may even throw the exhaust back on this time.
I am exploring my options. Lots of time to decide.

 

[Wookie316]

Yes stock block with billet mains and lifter bushings.

 

[Wookie316]

Converter I have should be a very nice match which is a positive.

 

[Tex013]

Mid - high 6000s stall ?
Mine is low 6000s behind my 505 , 5800 behind my 440
Filled block to help ?
I am hopingbto pick up my finished new World iron block on monday or first week january

Tex

 

[Tex013]

My 505 cracked #4 main up into water gallery at around 680hp

Tex

 

[dvw]

Explain to me the difference in port work between the 2 sets of heads.
Doug

 

[Wookie316]

Here are the before and after of the 440-1 heads. I am trying to find the EZ head flows.
The way it was explained to me is the flows are similar, but because of the port volume difference, the -1 likes more cubic inches.

 

[Wookie316]

Intake Lift Flow Exhaust Lift Flow

.100 65.7 .100 57.1

.200 140.9 .200 105.5

.300 207.6 .300 140.8

.400 264.3 .400 172.6

.500 322.8 .500 204.0

.600 359.2 .600 229.7

.700 341.0 .700 249.1

.800 347.3 .800 256.9


Here is the EZ heads.

 

[PRHeads]

Some of the missing info on the -1’s after porting:

Lift———in/ex
.100—- 71.7/60.3
.200— 151.2/117.8
.300— 215.4/166.6

These came to my shop as used heads, and they already had some minor bowl blending and polishing in the runners done to them.
The “before” numbers are how I got them, but after disassembly, cleaning, bead blasting.

Also, the -1’s have a 2.19 intake valve, 2.25 for the EZ’s.

The big caveat here is....... the numbers for the two heads come from different benches.

 

[PRHeads]

As a point of reference, cnc345’s w-2.25” intake valve, PRH VJ and blend.
These made 786tq@5200 and 872hp@6600 on a 572 with a port matched 440-2 with a 4150/4500 adapter and a Holley 1150.

Lift———in/ex
.100—- 72.6/57.5
.200— 151.2/113.0
.300— 211.7/161.2
.400— 270.7/200.6
.500— 321.4/233.6
.600— 355.4/256.0
.700— 367.0/271.6
.800— 381.4/283.2

Let’s put the other two heads side by side:

Int:
Lift———ez/-1
.100—- 65.7/71.7
.200— 140.9/151.2
.300— 207.6/215.4
.400— 264.3/273.7
.500— 322.8/317.9
.600— 359.2/332.8
.700— 341.0/354.1
.800— 347.3/362.7

Ex:
Lift——— ez/-1
.100—- 57.1/60.3
.200— 105.5/117.8
.300— 140.8/166.6
.400— 172.6/211.0
.500— 204.0/241.5
.600— 229.7/260.8
.700— 249.1/272.9
.800— 256.9/280.4

 

[dvw]

Same dyno?

 

[cdr]

BSFC is all over the place, ???

 

[PRHeads]

BSFC is all over the place, ???

That’s what I noticed first off.

Really odd looking fuel flow curve.

Not to speak out of turn...... it’s not my thread..... but yes, same dyno.

 

[Wookie316]

Yeah. I wish I had been there the day of the dyno. We could of tried a different carb and removed the spacer. At least we could of eliminated those 2 variables.
The other thing that has changed since the last dyno is the cloverleaf was removed from the manifold. Perhaps that was a bad thing to do?

 

[cdr]

The fuel is telling us something is wrong, I do not no what, just guessing , valve lash to tight, valvetrain gone nuts ??

 

[Wookie316]

Yeah it has been suggested to me that the intake lobes could use 7/16 pushrods.

 

[silver67]

Sorry to but in, but are those early -1 numbers from hand porting ?