Sr20det FAQ

[89hatchman]

Double checking. I can run 10-12 psi boost on stock injectors and tune correct?

I've heard people say that stock boost is 7 and others say its 12....Mine is currently running at 7

[Mikester]

Originally Posted by 89hatchman

Double checking. I can run 10-12 psi boost on stock injectors and tune correct?

I've heard people say that stock boost is 7 and others say its 12....Mine is currently running at 7

Posted my answer to this in your other thread...

Stock boost seems to vary a bit on SR's (S13 red/black top), I think mostly due to variances in the age or type of the WG actuators.

You CAN run as much boost as you want- whether or not you SHOULD is the real question. At 10psi, you'll still be okay. At 12, you'd be amazed at how lean it will be. If your plan is to run 12psi on the factory setup, I recommend rethinking that & getting injectors and Enthalpy or JWT tune at minimum.

Don't get me wrong, I ran my SR at 14-16psi back in the day before I got smart & gave it the tright amount of fuel. Looking back, I feel very lucky I didn't blow the motor. People will tell you that running 12psi is 'safe' and that I am full of shit- but the numbers don't lie... If you're really concerned about it, put it on the dyno with a wideband attached and see.

[jr_ss]

Originally Posted by 93kouking

10 lbs is stock, not 7lbs. and 205 stock rating is not at the wheels..

Without the factory boost control solenoid, 7psi is stock. Therefore, since most people do not run the factory boost control solenoid, he is correct.

Originally Posted by 89hatchman

Double checking. I can run 10-12 psi boost on stock injectors and tune correct?

I've heard people say that stock boost is 7 and others say its 12....Mine is currently running at 7

Read above. The other part of your answer varies. What engine setup? S13 SR w/T25 can get away with slightly more boost than say an S14 SR w/T28. Regardless, I wouldn't push the S13 past 11-12psi without injectors and a tune. S14 no more than 10psi.

Originally Posted by Mikester

Posted my answer to this in your other thread...

Stock boost seems to vary a bit on SR's (S13 red/black top), I think mostly due to variances in the age or type of the WG actuators.

You CAN run as much boost as you want- whether or not you SHOULD is the real question. At 10psi, you'll still be okay. At 12, you'd be amazed at how lean it will be. If your plan is to run 12psi on the factory setup, I recommend rethinking that & getting injectors and Enthalpy or JWT tune at minimum.

Don't get me wrong, I ran my SR at 14-16psi back in the day before I got smart & gave it the tright amount of fuel. Looking back, I feel very lucky I didn't blow the motor. People will tell you that running 12psi is 'safe' and that I am full of shit- but the numbers don't lie... If you're really concerned about it, put it on the dyno with a wideband attached and see.

Mike, with the factory boost solenoid most SR's run 10psi, with boost tapering off in the higher rpms. Without the factory boost solenoid, wastegate pressure is set at 7psi. Since most people delete or do not receive the factory boost solenoid, they run 7.