turbo...trim...?

I have a stock T-25 turbo and I recently discovered that it has 50 trim installed. Now my question...the "trim" refers to the compressor wheel right? Stock the t-25s are 45 trim? What are the pros and cons of bigger trim? Thank you for the help.

i dont think that you have any idea what you are talking about trim wise. the "50"trim is a t04a,b,c,e,etc . you have a t25 there is no way to stuff a 50trim wheel in there. a t28 wheel maybe but not a 50trim. do some research on turbos, because a 50trim turbo is at least 4x bigger than what you have.

Trim says nothing about the turbos size, but rather the inducer to exducer ratio ;) You can have a turbo the size of a quarter and a turbo the size of your head both have a "50 trim" wheel.

When does your turbo spool? But you don't have a 50 trim in a t25.

Dyno it and prove it. If u lag alot then its probably a t-28 wheel but i doubt its a 50 trim. Have u seen a 50 trim wheel yet?

I think everyone missed the part where I said the T25 wheel could be a 50 trim wheel, even if its not THE "50 trim" wheel. The trim is not related to the size of the wheel.

pictures would help ALOT in this thread. i also need help understanding this too. Who ever has time, please show us what the difference is. thanks!

Well I'm sorry I'm still new to turbos and such. The guy that owned the car before me didn't help me much either. I'm assuming it's the stock turbo. The only thing I can tell from looking at it is that it is a Garrett turbo. The guy told me it has 50 trim installed but that is all he told me. It starts to spool around 3500 and full boost is around 4500 or so. It seems to spool pretty damn fast compared to other turbo cars I have ridden in. Thank you for any help.

Oh and the lag is very minimal. Even with the stock blow off valve. It maybe drops 3-4 pounds then climbs back to full boost fast. If it would help I could get some pictures. I'm sorry I can't provide more information. I know that the turbo was replaced when the tranny/engine was rebuilt but he didn't know if the guy before him put an aftermarket or stock back in it. If thats confusing I'll simplify it for everyone...there were 2 previous owners before me. First guy did all the modifications so the guy I bought it from doesn't know jack shit.

Okay I got ahold of the previous owner and he told me that it is deffinatly not a t-25. It is a Garrett model turbo though, obviously (it says it on it the damn thing). Other than knowing it is not a t-25 and that the turbo has 50 trim he said he is clueless to anything else.

isn't the t25 a garret turbo just a small one?

The t25 is a garret, but full boost around 4k rpm would be characteristic of a to4e 50 trim. What is the manifold? A full garret turbo will not bolt up to the stock manifold and O2 housing. I'd be a little nervous if the previous owner can't say for sure what turbo is on there. T28 would bolt up. Got any pics?

I don't have pics yet. As for the manifold I'm pretty sure it's stock. The cover for the manifold was taken off and it is rusty as shit so I'm assuming it would be the stock one. I was wondering would an evolution manifold work with a to4e turbo?

If it is a "bolt on" "hybrid" to4e type turbo, then you can use the EVO3 or SBR manifolds. If its a full garret to4e you need a t3 manifold, like the SFP or turblonetics unit for example.

Okay I finally got pictures. I hope these will help.

Here are the links because I could not get them to upload to this server.

http://nathan21224.tripod.com/pics/Turbo1.bmp

http://nathan21224.tripod.com/pics/Turbo2.jpg

Damn that didn't work either. If someone thinks they could help me out by looking at my pictures I could email them to you.

i was able to see them. That would be a Mitsu style housing, as far as turbo size, I couldn't tell you. I can say that it's not a t-25 or t-28.

Thank you Tsitalon9587. That at least narrows it down. Does anyone know someone who would be able to tell me what size turbo it is by looking at it? It's deffinatly a garrett turbo so that should also help to narrow things a little.

I'm pretty sure Aaron just said its a mitsu style housing, which would mean its NOT a garret turbo. Unless he meant turbine housing. Email me the damned pics so I can put this to rest before I snap.

I think I just confused myself, but I was talking about the exhaust housing, as it's bolted to a stock manifold.

Edit: I just noticed it says "garret' right on the comp housing. You also have one of those fancy fangled o2 housings.

The inlet of the turbo is weird too, its one of those bolt on ones, which isn't something common on DSM's. I rarely see it.

The turbo says Garrett on the side so I would assume it is a Garrett turbo...

I think I just confused myself, but I was talking about the exhaust housing, as it's bolted to a stock manifold.

Edit: I just noticed it says "garret' right on the comp housing. You also have one of those fancy fangled o2 housings.

The inlet of the turbo is weird too, its one of those bolt on ones, which isn't something common on DSM's. I rarely see it.


Is that a good thing or is there a reason they are rarely seen on dsms? Oh and 95 GSXracer I pushed the email button and it didnt show me ur email address so I couldn't copy it and send you the pictures through hotmail. My email address is [email protected] you can email me or just post your email address so I can send you the pictures and so you and me can get a good night sleep.

I got your email, but realized later that I dont think you can attach files to the email system on this site. Ah well, I replied so you have my address.

Ah still no luck Kevin suggested that it may be a TO4B and I know for certain now that it is not a t-25. If anyone else thinks they can help me narrow down the field a little more the input would be greatly appreciated let me know what your email is and I'll send the pictures to you.

Hey kevin I found a something that may help you comare a little better to a T04B. I read up and it says it will bolt up to the stock manifold and downpipe...could this it?
Anyway here is the link...scroll down a little on the page and you will see it.
http://www.dsmparts.com/customer/home.php?cat=166

Hard to say. No turbo "meant" for a DSM has that gobshyte bolt on inlet thing. If you can get a clear pic of the actual compressor wheel, you could compare that to pics of various known compressor wheel pics, which are relatively easy to come by on the internet.

Okay I'll get a good clear picture of the compressor wheel tommarow if I can, but on a side note...why would it even have that "gobshyte bolt on inlet thing?" Did someone not feel like doing some custom fitting and slap that on there or what?

I just got done jacking up my car and snooping around the turbo and trying to find numbers/letters anything. The only ones I was able to read where on the back side of the turbo inlet and it was 7811BB0 im not sure if the last one is a 0 or and O. Anyone know what this might stand for? Oh and right before these letters/numbers there was a mitsubishi symbol. So im guessing this is a mitsubishi/garrett turbo? This just gets more confusing every day.