The internal wastgate on a t-25 is I think 12psi...I wanna run maybe 5-8psi. Does anyone know of a way to lower the boost from the sotck wastegate acuator. i have herd of the (cutting the wastegate arm and thread it with a long bolt ect...ect) but that makes it more laggy....or does it work well?? thanks! -Greg-

 

Actuators should be adjustble...theres no spring on it?....boost controllers will work too.

 

stock actuator on my t25 is set for 6-7psi.

 

6-7psi??? how????

 

its 7-8 on mine.

 

how is the wastegate hooked up on your setup?? so the wastegate does not acheave 12psi with only the actuator operating it?? I only need like 5psi for now and I was wonding if anyone knew how to do it ;-)

 

Mine was set to 12-15 psi. There are two ways to go about switch the levels. One is a "ghetto" way, and one isn't but is more work.
There is a guy on the board who took the arm off his wastegate, and ran a spring hooked onto the engine somewhere to the little part that the arm connects to on the valve. He kept messing with different pound springs till he finially found one that opened at his desired boost level.
The way I did it was I ordered a new wastegate from a company in colorado called TEC (turbo engineering something, I can't think of the name right now) It was just the canister, and you had to cut the old canister off the flange that bolts the wastegate to the turbo, and cut the arm off the old wastegate. Then you drilled two holes on the flange, so that the new wastegate canister could bolt onto the flange. You then have to cut the old arm to the right length and weld it onto the little nub that comes out of the new canister. A little bit of work but well worth it.
It came set at 4 psi, and works beautiful. Opens very fast, haven't overboosted with it yet. I'll try to find their number and get back to you. It only cost 75 bucks shipped overnight to ohio, so not very expensive.

Also, to the guy that posted about using a boost controller, I'm pretty sure a boost controller can only raise boost levels, not lower them.

Hope this helps ya,

Nick

 

The T25 should be set somewhere between 6-8psi. The stock DSMs run 12+psi because there is an electronic boost controller, stock, that raises it. I know this is the case on the Galant VR4, and I'd assume on the other DSMs that use the same engine.

I don't think you'd want to run boost lower than 6-8psi because it won't be as fun and any honda engine can take that without any problems, assuming proper fuel and timing.

 

Nick I'm interested! get back to me with there # and some more info on your setup. Are you running 4psi daily?? Do you have an MSD BTM?? how does 4psi feel?? Thanks!! -Greg-

 

its a garrett t25 ball bearing (60 trim T3 comp wheel), not the DSM type
http://www.public.asu.edu/~ramirez0/Turbo/my_turbo
http://www.public.asu.edu/~ramirez0/Turbo/my_turbo_1