hey, heres my dyno sheet of a t67 turbo on my car @ 20 psi boost. Low hp/torque rating for 20 psi. I have a huge question though, why would my 750cc injectors be maxing out at 6000 RPMS as you see on the sheet. I am using stage 1 computer and SAFC. I beleive i have stock Map and TIP sensor.

 

maybe you need a bigger fuel rail???[:-]

 

here is a link to a fuel system bottleneck fix...this might be your problem? Click here

 

I've been helping a friend tune a T67 setup on his SRT-4 and he has been running into one small problem after the other.

The time before last time at the dyno he ran out of fuel (like you) but at 28psi. Turns out his Walbro 255 fuel pump was going bad and wasn't up to the task. We found this by watching the fuel pressure gauge during the pull, at about 5000 rpm, the fuel pressure started dropping with a little bit of fluxuation.

He replaced the in tank Walbro w/ a new unit and also added an external Walbro 255 (not my recommendation). The "spool boy mod" was done to the intank pump and a -6 line was used all the way to the fuel rail.

This last dyno trip everything was going well (ZERO fuel issues) until we started getting ALOT of random spark blow-out. After changing the plugs, the car wouldn't crank; checked the battery voltage and it was 4.6v. DOH... so now he is going over the electrical system to figure out what is wrong, as even after charging the battery and trying jump start it won't crank (the solenoid on the starter just clicks loudly).

Having said that, your numbers are indeed pretty low for a T-67. We made ~430whp on 22psi and then made ~490whp on 27psi (on a pull where the mysterious spark blow out was not present). This is with a fully built engine, NRGY race ported head and Crane 14's using the older AGP Log type turbo manifold, using a D-Tec piggy back on a Mopar Stage 2 ECU.

 

can you post the dyno sheet?

 

If there is anyone I would ask this kind of advice from it would be MChat.

 

I'll see if I can have the owner forward them to me.