Rep Power: 379

Ive bene haveing problems with my wastegate/vaccume on my Garrett T25 BB, it is the standard internal wastegate. Ive narrowed it down to this. I want to change it out for a bigger one or I guess ones that dosen't open until higer boost and better for a boost controller. And I don't want to spend the $100's it would cost to convert it to an external. Ive searched but could not find one. Any help?

 
Rep Power: 396

I just don't know the much, but perhaps a stiffer spring?

 
Rep Power: 379

thats what I was thinking, the thing is im not really sure if the one that i son there already is adjustable. because ive read where DSM's run like 16psi. and if it is how do you adjust it?

 
Rep Power: 299

Sound to me like you need a bigger turbo, not a bigger wastegate!

 
Rep Power: 379

ummm?? why do I need a bigger turbo? when my problem is that my wastegate is opening to soon, like 5psi no matter what my boost controller is set at and is also causeing adverse affects on my vaccum like not regulating right? causeing my vaccum levels not be i guess to low?? and 10 instead of 20. I'm just going to run 10-12psi. the t25bb does that just fine.

 
Rep Power: 331

if your turbo doesnt make any more than 5psi, despite your boost controller being set higher...you need a new boost controller.

 
Rep Power: 396

Hmm, creepin. =*(

 
Rep Power: 0

So your saying it is set too low? Just get a boost controller and end the saga. Manual or electronic.

What is VAC on a warm idle? What is your vac on a cold idle? What is it on decel? Are you sure your gauge is reading it right? Any idle issues? Sputter or sporadic idle?

 
Rep Power: 379

my vaccum is at like 10 most of the time, sometimes goes down to 0 sometimes it jsut goes back to 20, usually thats after I boost it gard in liek 3rd, it evens out. It sucks bacuse that cause my breaks to well become usuless. SO, i haven't drivin the car in teh last few days. Whenit warms up it does the same thing, its liek a sputatic thing. have vaccum one day but not the next. this has jsut been happenign recently.

the idel is pretty good. every once in a while the idel will sputter a little after revving a little higher because im running rich, and have to get that tunned out. but It always goes right back to a stock 700ish range. in like 1 second. and yes the guage is reading right. andi have no vaccum leaks that i know of. I checked teh main vaccum booster, all the vaccum lines, the guagae line, and no leaks.

 
Rep Power: 0

10 is mighty low. My 7thgen was 15-18 idle and 20-25 on decel. Sounds like a vac issue more than anything. Try replacing the vac lines and/or make sure there are no kinks or restriction in them.

 
Rep Power: 379

yeah tahts what im saying. my vaccume lines and everything are good. i removed the boost controller and now it idels fine where it should be at like 18-20. ive never heard of a boost conrtoller goging bad like that. but now im boostign at 4.5psi which is what teh gate is set at. could i possible use a wastegate off a eclipse or even a older probe that is adjustable? cause i don't feel liek dropping the cash for an electronic boost controller.

well jsut got an adjustable wastegate off a DSM car, and bought a new boost controller. should be here next week. lets see if it helps stabalize my problem any.

 
Rep Power: 424

You don't need a new WG, you need a new MBC. Pick up any decient brand one like a Hallman, turbosmart, TurboXS, etc.... and you should be good to go.
Hopefully the DSM WG arm fits the turbo, some of these WG actuators are fairly car/turbo specific.
If you still end up not getting it to work, then pick up the optional GT28RS 7 psi actuator from ATP turbo and their universal WG bracket. The bracket bolts into the clocking bolts on the compressor housing (use longer bolts) and you can position the actuator wherever you need it. This is what I wound up using, it works quite well.

...and obviously, retune the car after you bump the boost.

 
Rep Power: 379

i have a hallman currently but it is older and used so i bought a new hallman. and the wastegate only cost $10 so no biggy if it don't work. But they did run a t25 on the DSM cars so it should work.

 
Rep Power: 396

I got a brand new TXS one still in the box, if ya want me to ship that out to ya. It's not doing me any good anymore lol

 
Rep Power: 379

thanks for the offer but jsut bought hye new hallmann.

 
Rep Power: 424

How the WG mounts doesn't have anything to do with it being a T25, it has to do with where the bracket mounts on the compressor housing is located and how the turbo is clocked.
You need the mount to line up with the WG flapper or the arm won't fit.