Evo X head flow numbers!

[Unowned]

D Buschur brought 4b11 and 4g63 head flow information for Intake and Exhaust valves... http://forums.evolutionm.net/showthread.php?t=339784



I bought a new EVO X cylinder head to get started on port work and such for it.

The first step is to get the head on the flow bench and see what it flows before you start, of course.

We got the head off the flow bench today. Here is a BASIC idea of what the head flows. This flowbench (like our Mustang Dyno) reads numbers lower than the typically used Super Flow bench. The bench we use is a GKN bench.

INTAKE PORT, lift was measured at the valve.

.150 141 cfm
.250 202 cfm
.350 242 cfm
.450 256 cfm

EXHAUST PORT, lift was measured at the valve.

.150 142 cfm
.250 197 cfm
.350 212 cfm
.450 219 cfm

These numbers don't mean much without something to compare them to. So here are the numbers from a STOCK EVO8 head.

INTAKE PORT, lift was measured at the valve.

.150 177 cfm
.250 221 cfm
.350 224 cfm
.450 228 cfm

EXHAUST PORT, lift was measured at the valve.

.150 135 cfm
.250 197 cfm
.350 218 cfm
.450 218 cfm

So as I expected from looking at the cylinder head the intake port is killer on the head. The exhaust port is pretty close to the EVO8 stock head which is surprising looking at it, it looks like it would suck, not the case.

There looks to be some huge gains in the cylinder head. We'll have to ruin a few before we get a finalized head but we are working on it.

[Boostd4]

I saw this today as well...I'm excited to see what these tuners start pulling out of this motor. The only thing I'm still concerned about is longevity of the motor after throwing a lot of power at it...but i guess we'll see.

(btw...I think I might pick up that ETS piping kit and the Ultimate Power exhaust heh heh)

[earlyapex aka jack ass]

Would be interesting to get Evo 9 head flow #'s as well for comparison. I heard it's different than the Evo 8.

[whtrice]

I took a look at the Cosworth site since I know they offer big port heads for MIVEC and non MIVEC heads. Either it is a mistake or they are using the same flow numbers for both.

http://www.cosworth.com/uploads/1165517642.pdf



Would be interesting to get Evo 9 head flow #'s as well for comparison. I heard it's different than the Evo 8.

[EFIxMR]

I definately think there is something special about the MIVEC head beside the MIVEC itself. On a big turbo setup there is almost a 40-50 whp difference between a evo 8 and 9 similarly equipped.

[esco]

hmmm.....wonder how much boost can the head take b4 *pop*.....deck height, whats the gasket.... copper now? or what?