3400 Turbo Dyno

[z24turbo93]

285.6 hp at 6500 rpm
244 lbs torque
6psi
Turbo TO4e 46 trim .48 exhaust .6 intake

Motor is 3400, forged pistons, arp rod bolts, crane 260h cam.
The dyno numbers are a little off because of the messed up throttle cable and restrictive exhaust that i forgot to open up.


Anyone have the specs for the milzy motorsports 3400 boost cam. I was thinking of throwing that in next??? Or would it need a lot of tuning?

[Guest]

I am surprised you made that kind of power on that small turbo with that little bit of boost. Post graph?

[TurboGt]

Do you have the ls6 valve springs installed?

Nice numbers!!!!

[Joseph Upson]

285.6 hp at 6500 rpm
244 lbs torque
6psi
Turbo TO4e 46 trim .48 exhaust .6 intake

Motor is 3400, forged pistons, arp rod bolts, crane 260h cam.
The dyno numbers are a little off because of the messed up throttle cable and restrictive exhaust that i forgot to open up.


Anyone have the specs for the milzy motorsports 3400 boost cam. I was thinking of throwing that in next??? Or would it need a lot of tuning?

If you are considering a cam upgrade go for a regrind to specs more specific for a turbo instead of naturally aspirated. Schneider racing reground my stock roller to turbo specs for $127 you'll need to spend another ~$90 for pushrods to work properly with it.

Those are very good numbers although they seem to be backwards, the turbo kit being offered for that motor made 264 hp and 284 lb/ft at 9 psi on a stock motor so the cam must be the reason. Usually the torque climbs just as much as the hp if not more. Then again it might be the turbo, according to numbers I've looked at your turbine housing is less than half the size it should be but then a T4 .48 is probably larger than a T3 .48 given that the number is a ratio.

What kind of transmission are you using and what are the specifics on your install if you are willing to share that information?

Disregard my cam recommendation, I missed that you indicated boost regarding it.

[z24turbo93]

Motor is:

2000 3400
Bored .030
Wiseco Forged Pistons
Ls6 Valve Springs
Arp Rod Bolts
Stock Heads
Custom Headers
Crane 260h cam
2.8 pushrods
3400 Valvetrain
282 5 speed

Those numbers are a little off compared to the car right now. I changed the throttle cable set up some and the car seems to have a lot more power now. So maybe that was affecting some throttle response and also hurting some of the dyno numbers....torque????

Also the exhaust wasn't set up for optimal power on the dyno. I had 2.5 crush bent going back after my 3 inch downpipe and i forgot to open the exhaust cut out for it.

[Joseph Upson]

Since you have a hydraulic flat tappet a custom grind is not that expensive at all you should take that route and turn the boost up to a more appropriate double digit number. Actually since you have a manual transmission the power numbers may not be that far off. The automatics put a big dent in the horsepower numbers.

[TurboGt]

Is there a reason you arnt pushing more boost?? Still working on the tuning??

[z24turbo93]

Reason i didn't turn boost up higher is because the motor had approximately about 500 miles on it when it got dynoed. The motor will be run at 12 psi here shortly.

[TurboGt]

Very nice, keep us updated when the boost goes up!!!!!!

What ecu are you running? 7730?

[z24turbo93]

I am actually running a grand prix computer with a tgp chip. It is essentially a 7730 computer though.

[Syn]

ryan how are you getting away with running the 2.8 purshrods

[TurboGt]

Have you done any tuning to it or is it a stock tgp chip?

I have a spare 7730 ecu laying around and was thinking of hooking it up and playing around with it so I know how to tune in both GM ecu's and MS ecu's.

[z24turbo93]

Russell, the 2.8 pushrods work just fine. Although i should have custom ones made. Everyone just has a hissy fit about using custom pushrods on these motors. I had mine taken to a engine shop and he said they would work just fine and there would be no need for custom pushrods.

Mine is a stock tgp chip. As of right now the airfuel ratio is below 11, my guess would be even below 10. When i raise the boost up i am not going to add fuel with the rrfpr at all. i am going to raise boost till the chip can't give me enough fuel. I am hoping that when i turn boost up it will lean it out to about 11.0-11.7.

[Superdave]

z24turbo93, check your PM's

[0ipissonhondas0]

hmmmm thinking

ok let me think hear stock comp.ratio is.......9.5:1 and adiquit comp.ratio should be around.....8:1 maybe if your pushing 12psi or more so tell me using your 2.8 pushrods and custom pistons what is your comp. ratio????

see with mine i am using stock rods just getting them ping tested with dish-style , Alum. pistons and girtle ,windage tray