Reworking voodoo heads

[Voodooo]

I would love to see the power increase your heads have over stock GT350 heads on a stock 5.2 flat plane crank engine.

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[Scp-steve]

I agree. I need some test mules!!!!

 

[Scp-steve]

Ready for decking and then assembly

 

[Voodooo]

How much you going to shave off?

 

[Scp-steve]

Minimal amount
I don't want to start affecting cam timing or changing geometry too much

So it's just going to be a clean up pass

I'll cc the chambers for u

 

[Scp-steve]

After the clean up pass. Maybe removed .002-.003 from the deck

 

[Scp-steve]

Pic

 

[Voodooo]

Gt350
1.460 intake
1.225 ex
Coyote
1.460 in
1.250 ex

.100- 92
.200- 181
.300- 247
.400- 294
.500- 315
.600- 324.9


.100- 102
.200- 175
.300- 217
.400- 237
.500- 247
.600- 253


These are the flow numbers on these heads. We rechecked them

I have a question about the valve sizes you listed above. The 5.2 and 5.0 do not have the same valve sizes. And you show the 5.0 as having .025 larger exh valves.

 

[Scp-steve]

Those valves are ferrera one piece stainless valves
These heads arrived with them already in it

We flowed the head with stock valves and picked up 5 cfm btw

 

[Voodooo]

Those valves are ferrera one piece stainless valves
These heads arrived with them already in it

We flowed the head with stock valves and picked up 5 cfm btw

So you installed smaller valves then stock?
Stock voodoo valves are...
Intake 38.3mm or 1.532
Exhaust 32.5mm or 1.280

 

[Voodooo]

After looking at the combustion chamber I don't think these are voodoo heads.

 

[Scp-steve]

There voodoos
Factory cnc heads

I'll re measure the valves. I might have swapped those numbers around

 

[Voodooo]

There voodoos
Factory cnc heads

I'll re measure the valves. I might have swapped those numbers around

I understand they are cnc factory. But the chamber is not the same as a voodoo from the pics you posted. Do you have a pic of the exhaust port header flange surface?

Also the coolant passages on your heads are not the same as a 5.2.

 

[Gremlinsteve]

Interesting. I will take pics tomorrow of that
I was advised these where voodoos. Maybe you are correct

 

[Gremlinsteve]

Do you have a picture of a stock voodoo chamber

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