Boost control on a well set-up Evo 9

[Withilt]

The current 91 oct Evo 9 stock turbo record holder on our mustang dyno is making 339whp. To put this number in perspective, most Evo 9's with a upgraded FPgreen turbo do not hit this number on 91 octane. (usually around 325-350whp for a FPgreen)

The key to this great power is not only a great mod list and well ported bits but it is also the well thought out boost control system on the car.

This Evo is running this system for boost control:

Forced Performance 18psi upgraded actuator
GM 3-port Boost solenoid
Ecu-controlled boost

Which makes this boost plot possible

scott_91boost.jpg
Notice it is still over 22psi at 7100rpm. This is also not maxed out as on 100oct it held about 1.5psi more.

The following full mod list for this Evo where all planned out for maximum efficiency with the stock turbo. This allows for the slightly elevated boost levels on 91 oct pump gas with no traces of knock and 100% consistency.

Mods:

WORKS throttle body
WORKS 76mm DP
WORKS 3in TB exhaust
Cosworth 272 IX cams
HKS exhaust adjustable cam gear
SAMCO IC hoses
Nisei LICP
Denso 720cc Injectors
GM solenoid
Perrin FMIC
Hyperforce System
RRE rally cat
GST open air filter
Titek tubular 02 housing
Ported stock exhaust manifold
Ported and coated hotside
ARP head studs
FP actuator
Stock evo 9 turbo

[boobooevo]

Have you thought of a dual stage boost setup? A in-line manuel for building boost and the solenoid for hold boost up top. I'm sure with the green, building boost isn't as much of an issue, but there some good advantages to a dual setup.

[Black Evo Beauty]

Not a believer you lost me at 720cc injectors

[boobooevo]

RC1000 would be a big help along with a 255, maybe consider E85?

[evo_jfa]

E85... maybe 1200cc the best shot. One good example how to squeeze more juice from the stock 9 turbo with porting... however I see stock Intake Manifold porting could help in the flow area

[Black Evo Beauty]

The current 91 oct Evo 9 stock turbo record holder on our mustang dyno is making 339whp. To put this number in perspective, most Evo 9's with a upgraded FPgreen turbo do not hit this number on 91 octane. (usually around 325-350whp for a FPgreen)

The key to this great power is not only a great mod list and well ported bits but it is also the well thought out boost control system on the car.

This Evo is running this system for boost control:

Forced Performance 18psi upgraded actuator
GM 3-port Boost solenoid
Ecu-controlled boost

Which makes this boost plot possible

scott_91boost.jpg
Notice it is still over 22psi at 7100rpm. This is also not maxed out as on 100oct it held about 1.5psi more.

The following full mod list for this Evo where all planned out for maximum efficiency with the stock turbo. This allows for the slightly elevated boost levels on 91 oct pump gas with no traces of knock and 100% consistency.

Mods:

WORKS throttle body
WORKS 76mm DP
WORKS 3in TB exhaust
Cosworth 272 IX cams
HKS exhaust adjustable cam gear
SAMCO IC hoses
Nisei LICP
Denso 720cc Injectors
GM solenoid
Perrin FMIC
Hyperforce System
RRE rally cat
GST open air filter
Titek tubular 02 housing
Ported stock exhaust manifold
Ported and coated hotside
ARP head studs
FP actuator
Stock evo 9 turbo

I call BS on this 1