GT350 heads vs 5.0 ported

[Turbovenom]

I've quickly searched, curious on flows between stock 5.0 heads (gen1) and gt350 heads are, what are 5.0 ported heads comparably? Can the 350 heads be ported or are they already maxed out?

Sponsored

 

[illtal]

Depends on who ports the head will determine a ported head flowrate.
Some of these companies use different flow benches as well, it is something to be aware of when comparing the two.

I know that you cannot use a GT350 head on a crossplane coyote without some work being done to the heads themselves.

If you want to start with a better head that will work on a crossplane coyote the predator heads are where I would go OR Gen3 which are 60% of the cost of Predator.

Porting will invariably flow more than any stock head, especially if the valves are enlarged. with that being said the GEN 1 heads have smaller valves than any other head that you can use (read, more money to port and buy new valves).

 

[Turbovenom]

I guess I should say not a cut and dry cfm or anything just kind of a general consensus I know gt350 heads will out flow stock gen1 but is it a huge gain and how do ported gen1 do compared to gt350 and can they be opened up more.... I was considering livernoise and when I spoke to them they said the port frees up alot the valves don't do a ton however I was going to do the plus1mm anyways. I'm not to concerned about mating to the coyote block however I'm in between sleeving mine or going with the voodoo block just weighing everything out. I'll check out that post though.

 

[illtal]

I guess I should say not a cut and dry cfm or anything just kind of a general consensus I know gt350 heads will out flow stock gen1 but is it a huge gain and how do ported gen1 do compared to gt350 and can they be opened up more.... I was considering livernoise and when I spoke to them they said the port frees up alot the valves don't do a ton however I was going to do the plus1mm anyways. I'm not to concerned about mating to the coyote block however I'm in between sleeving mine or going with the voodoo block just weighing everything out. I'll check out that post though.

Look here

https://lmr.com/products/differences-between-mustang-5-0-coyote-engines


Obviously it's a cumulative thing. more compression more lift more RPM.... I know for a fact a ported head will outflow factory but a gen one will need to be looked at, all of the newer gens have higher lift cams.

 

[Turbovenom]

Thanks. I have a solid understanding of this platform and the differences in engines. I know valves cams timming components are different I'm really not concerned with that. I really am trying to figure out whether or not it's worth getting a set of voodoo heads or building mine up.

 

[GregO]

all of the newer gens have higher lift cams.

Only by 1mm (.040 rounded up) not a lot, the magic is the 4 valve heads don’t require high lift to achieve high CFM’s.
4 valve vs 2 valve cam profiles are so different it’s sometimes hard to forget 2 valve cam dynamics when thinking about the Coyote 4 valve.

 

[illtal]

Only by 1mm (.040 rounded up) not a lot, the magic is the 4 valve heads don’t require high lift to achieve high CFM’s.
4 valve vs 2 valve cam profiles are so different it’s sometimes hard to forget 2 valve cam dynamics when thinking about the Coyote 4 valve.

Read the article it's 2 mm lift. 12 vs 14. I'm not sure what the duration is but certainly more lift is more powa.

Thanks. I have a solid understanding of this platform and the differences in engines. I know valves cams timming components are different I'm really not concerned with that. I really am trying to figure out whether or not it's worth getting a set of voodoo heads or building mine up.

Sorry, here's my vote. For the money build the gen 1. Go +1 valves and get cams.

Retooling the voodoo to work for your application would cost a bit. It is not a straight bolt on. Just ask a reputable shop what's all involved. It's diminishing returns for cost involved.

OR

Predator heads, ported.

 

[GregO]

Read the article it's 2 mm lift. 12 vs 14. I'm not sure what the duration is but certainly more lift is more powa.

Yeah, I got stuck on Gen2 being this is a S550 platform forum.
More lift is more power, to what end.
12mm, 13mm, 14mm just isn’t that much of a lift delta IMO.
Now the valve diameter increase is significant relative to CFM increases.

 

[illtal]

Now the valve diameter increase is significant relative to CFM increases.

This

 

[80FoxCoupe]

Thanks. I have a solid understanding of this platform and the differences in engines. I know valves cams timming components are different I'm really not concerned with that. I really am trying to figure out whether or not it's worth getting a set of voodoo heads or building mine up.

For simplicity, build 5.0 heads.

 

[bauern]

Depends on who ports the head will determine a ported head flowrate.
Some of these companies use different flow benches as well, it is something to be aware of when comparing the two.

I know that you cannot use a GT350 head on a crossplane coyote without some work being done to the heads themselves.

If you want to start with a better head that will work on a crossplane coyote the predator heads are where I would go OR Gen3 which are 60% of the cost of Predator.

Porting will invariably flow more than any stock head, especially if the valves are enlarged. with that being said the GEN 1 heads have smaller valves than any other head that you can use (read, more money to port and buy new valves).

FWIW, the GT350 and Predator heads are interchangeable. They will both work on the Coyote block.

 

[illtal]

FWIW, the GT350 and Predator heads are interchangeable. They will both work on the Coyote block.

you can but them on there but you will need modified rockers to work with coyote crossplane cams.

I take back what I previously said. you can use them with some other parts.

 

[bauern]

you can but them on there but you will need modified rockers to work with coyote crossplane cams.

I take back what I previously said. you can use them with some other parts.

I should have put this in my earlier post for clarity, but the parts you need to put the GT350 on are the same parts that you will need for the Predator heads. I personally would not use the modified rockers, I would get the appropriate gen of Voodoo/Predator cross plane cams.

 

[EFI]

12mm, 13mm, 14mm just isn’t that much of a lift delta IMO.

That's a huge lift difference. In the 2 valve world (LS specifically), going from mid-high .500s to low .600s is worth a decent amount of power on a delta of .050.

12mm = 0.472in
13mm = 0.511in
14mm = 0.551

0.472 to 0.551 is a huge jump in of itself, now multiply it by 2 for each valve and that's the lift gain you get from Gen 1 to Gen 3. So a delta of .79*2=0.158 is huge in cam lift.

Now as mentioned, the 4V heads don't need as much flow to make good power, but in raw terms of the difference in cams it's pretty healthy. Although other factors are in play for final hp numbers which is why you only see a modest gain from Gen 1 to 3.

 

[illtal]

I should have put this in my earlier post for clarity, but the parts you need to put the GT350 on are the same parts that you will need for the Predator heads. I personally would not use the modified rockers, I would get the appropriate gen of Voodoo/Predator cross plane cams.

I just bought Predator rockers for my Gen3, so they cannot be the same because the cam holds the valve open on the coyote cams *disregard previous

You cannot use a voodoo rocker on a Crossplane coyote. the part numbers are different.
Voodoo = M-6564-M52
Predator/Gen3 = M-6564-M52A

* you cannot use the voodoo rocker in the crossplane coyote

Sponsored