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diablomatt

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and you are going to want a WAY tighter LSA on NA stuff. unless trying to keep the VCT. then it doesnt matter
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16MustangVet

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and you are going to want a WAY tighter LSA on NA stuff. unless trying to keep the VCT. then it doesnt matter
http://www.jpcracing.com/comp-cams-cr-2015-mustang-gt-n-a-stage-3-cams/

stage 3 na cams are 131 LSA but i think that lift would suck for heads flowing 340 cfm plus...

basically comp stage 3s with more lift

and yes id degree them because i dont want to use limiters.

a competent tuner should be able to keep the vct sweep from advance to retard under control enough to not have to use limiters especially on a 2016 coyote those dont need phase limiters on comp stage 3 na grinds anyways.
 

diablomatt

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im 100% positive the ported heads flow at least 340cfm
yes as that is what mine flow. but the point is you get a point where opening the valve more does not equal more flow because you have exceeded what the port can flow. keep in mind you have 2 valves. so .500 lift is like 1 inch of lift on a 2 valve. so usually mid to high 500's is about where they die.
 

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diablomatt

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.100 102 88
.200 205 160
.300 271 205
.400 305 221
.500 327 232
.600 339 243
.650 342 249

here are mine. see how it only gains 3 cfm opening another .050. that is what im talking about. it is pointless to run 600 lift and all it does is beat the shit out of the valve train.
 

16MustangVet

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They do but absolutely tops at .600 lift which you do not have with normal cams.

Stock: .500 289.4 201.4
No thats 340 at .500

flow at .600 doesnt mean nearly as much as flow at .500

if they can flow more at lower lift the better the heads as mentioned youll reach a max for the port.

ill take a head that flows 340 cfm at .500 over a head that flows 340 cfm at.600 all day
 

16MustangVet

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yes as that is what mine flow. but the point is you get a point where opening the valve more does not equal more flow because you have exceeded what the port can flow. keep in mind you have 2 valves. so .500 lift is like 1 inch of lift on a 2 valve. so usually mid to high 500's is about where they die.
right you are talking about velocity.

spc steve aka gremlin steve is who im getting a set of heads from let me dig up his numbers again. hes got them listed here on this site.
 

16MustangVet

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turbo cams are going to be different than blower cams of course. as well as rpm and intake combination.


mine currently are 248/260 @.050 115+0 LSA .576/.512 lift at the valve on a 115 centerline

is this supposed to be .517/.512 lift? and what cam cores were used for the set you have!?

how in the world did you get to .576?!! im having trouble finding out if a set of NA cams can be made to .550 lift.
 

veeefour

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No thats 340 at .500

flow at .600 doesnt mean nearly as much as flow at .500

if they can flow more at lower lift the better the heads as mentioned youll reach a max for the port.

ill take a head that flows 340 cfm at .500 over a head that flows 340 cfm at.600 all day
JPC stage 3 heads data:

.100 102 88
.200 205 160
.300 271 205
.400 305 221
.500 327 232
.600 339 243
.650 342 249

It's 327 at .500 lift which is best I've seen so far. Small gains above .500 lift
proves that you don't really need more lift with this heads.

Sock head:
.100 99 72.2
.200 180.2 147.8
.300 243.5 180
.400 280.0 189.7
.500 289.4 201.4
.600 298.4 202.1

Superb flow as for cast heads - roughly 30 cfm to gain at .500 lift.
 

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16MustangVet

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JPC stage 3 heads data:

.100 102 88
.200 205 160
.300 271 205
.400 305 221
.500 327 232
.600 339 243
.650 342 249

It's 327 at .500 lift which is best I've seen so far. Small gains above .500 lift
proves that you don't really need more lift with this heads.

Sock head:
.100 99 72.2
.200 180.2 147.8
.300 243.5 180
.400 280.0 189.7
.500 289.4 201.4
.600 298.4 202.1

Superb flow as for cast heads - roughly 30 cfm to gain at .500 lift.

No look at these numbers! These are with STOCK valves too. JPC uses OVERSIZED valves which will not be apples to apples comparison to these heads.

http://www.mustang6g.com/forums/showthread.php?t=73894&page=3

End result on the intake

.100- 101
.200- 189
.300- 254
.400- 298
.450- 315
.500- 328
.550- 340
.600- 350

Steve is a vendor on here too now AKA Scp-Steve

Send him a PM for heads. Im positive he can beat the JPC numbers.
 

veeefour

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Yes, my bad. JPC uses larger valves for their stage 2 and 3.

Stage 1 form JPC:

100 100 87
.200 187 151
.300 252 194
.400 290 210
.500 312 218
.600 318 220
.650 320 222


So Gremlinsteve did with stock valves: .500- 328 intake? Impressive but hmm...hard to believe :cool:
Please note that his initial measurements form STOCK head were .500 - 311 and 208 which is waay over Ford data.
 

diablomatt

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is this supposed to be .517/.512 lift? and what cam cores were used for the set you have!?

how in the world did you get to .576?!! im having trouble finding out if a set of NA cams can be made to .550 lift.

grind #19586 intake and #19598 Exh comp cams custom catalog. and yes .576


Yes, my bad. JPC uses larger valves for their stage 2 and 3.

Stage 1 form JPC:

100 100 87
.200 187 151
.300 252 194
.400 290 210
.500 312 218
.600 318 220
.650 320 222


So Gremlinsteve did with stock valves: .500- 328 intake? Impressive but hmm...hard to believe :cool:
Please note that his initial measurements form STOCK head were .500 - 311 and 208 which is waay over Ford data.

i was looking at this as well. im not saying they dont flows a lot but you are right the stock numbers seem too high for me. also there are ways to sway numbers ones way or another.
 

pinero61

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I run MMR NA grind cams (comp). Unless you're going max effort, I wouldn't touch the cams on FI.

If you're seeing valve float, then it may be worth looking into upgrading to custom grinds, VCT lockouts, and valve springs.
 

16MustangVet

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I run MMR NA grind cams (comp). Unless you're going max effort, I wouldn't touch the cams on FI.

If you're seeing valve float, then it may be worth looking into upgrading to custom grinds, VCT lockouts, and valve springs.
Can you please list the specs of your cams! I dont believe MMR lists them. Are they much different than the NA Comp Cams?

I really need to compile a Cam spec inventory so we all dont have to go on a goose chase for cam specs or get the typical "ohh we offer custom cams" which doesnt do anyone any good without knowing the specs!
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