I currently have a stock port 20B (C171) with a GT42R and was wondering what kind of power people had gotten on stock ports.

the closest match i've found is just over 400hp @ 8psi, but clearly that's not the max since it's only 8psi

just wondering what the highest power anyone's gotten out of a stock port with what turbo at what psi?

thanks
ryan

 

427 hp and 478 lb./ft. torque at 1 bar (14.7 psi) using stock twins and Electromotive Tec-II engine management.

 

420 at 8.5psi
480 at 12psi

Stock motor gt42
on a dynojet
sorry i can't find the dyno sheet

 

awesome. . .good to hear

480 @ 12psi is no joke. . . which 42 do you have?

mine is the GT4202R

thanks for the info guys, anyone else please post up
ryan

 

Compressor- Wh Dia 102mm, Trim 53, A/R 0.60
Turbine - Wh Dia 82mm, Trim 84, A/R 1.15

 

only difference in mine is 1.01 A/R as opposed to your 1.15, and the R. yours is not ball bearing correct?

what RPM were you hitting 8psi? 12psi?

thanks again
ryan

 

I don't have the ball bearing

4500rpm

 

Wasn't that engine streetported with "the same ports as Tony's engine"?

 

nope gave that motor to my bro
This motor will be ported next year if the car isn't sold

 

My friend did 575rwhp/480fpt @18psi of boost on a dynojet with a gt42 non ballbearing turbo with a 115 turbine housing on c16 with a haltech ems