My custom fab t-25 turbo setup

Addicted2Boost · Post by **Addicted2Boost** » Mon Mar 09, 2009 6:08 pm

ok the build has not even started yet but i already ran into an issue. the turbo exhaust manifold is for a t-3 turbo

when installed with a t3 turbo the turbo sits correctly like this

well the new set up I will have to use this flange

but here is the problem when installed the turbo will not sit not sideways but horizontal with either the inlet facing up or the 02 housing facing up to I was thinking since im going low boost high compression and lots of fuel that i would have the inlet of the turbo facing up and have the exhaust side have a "U" bend design from the 02 housing to get the pipe to go under the car does anyone see anything wrong with this design?

esteinmaier · Post by **esteinmaier** » Mon Mar 09, 2009 6:42 pm

I'm confused. The turbo you want to use is a T4 flange? Why not bolt the turbo on with the compressor to the passenger side? That's the way I had my 16g on there.

n20sxt · Post by **n20sxt** » Tue Mar 10, 2009 12:43 am

im confused as well... so your turbo is going to be vertical instead of horizontal? the problem i see w/ that is lubrication due to the oil not draining properly. the oil ports for the turbo have to be as close to "above & below" the CRHA as possible. Mabe im just looking at your drawing wrong idk

Addicted2Boost · Post by **Addicted2Boost** » Tue Mar 10, 2009 7:41 am

does anyone see the problem im having please look at these pics and maybe you will understand

He Hate Me · Post by **He Hate Me** » Tue Mar 10, 2009 9:41 am

The major problem I see is going to be your oil. The oil return goes with gravity, if you have it mounted like that, than the oil feed would go in and probably flood the turbo. I don't see this way working at all.

esteinmaier · Post by **esteinmaier** » Tue Mar 10, 2009 10:44 am

Ah, goofy flange. Not gonna work. Instead of adding that sandwich, you would be better off cutting the flange off the manifold and welding it back on at the 90 degree angle. That would also give you the opportunity to angle the flange how you want it too.

hul kogan · Post by **hul kogan** » Tue Mar 10, 2009 11:35 am

Yea, I agree. ^

Either cut that flange off and re-weld at an angle that positions the turbo correctly OR seek out another manifold if you don't want to deal with modifying the existing one.

Post by **racer12306** » Tue Mar 10, 2009 11:54 am

welding cast iron = PITA

i would get the right manifold

Post by **occasional demons** » Tue Mar 10, 2009 12:27 pm

Then you could have the proper size flange too.

n20sxt · Post by **n20sxt** » Tue Mar 10, 2009 12:48 pm

hmmmm that sucks, if you use the sandwich the turbo will probably not clear the fire wall, so your probably better off modifying the one ya got.

Addicted2Boost · Post by **Addicted2Boost** » Tue Mar 10, 2009 4:48 pm

racer12306 wrote:welding cast iron = PITA

i would get the right manifold

this is a dsm turbo they dont make t25 manifolds

Post by **racer12306** » Tue Mar 10, 2009 5:30 pm

you will probably spend just as much paying someone to weld that and do it right.

just start over. obsolete stuff FTL

n20sxt · Post by **n20sxt** » Wed Mar 11, 2009 12:01 am

idk bout you but around me a junkyard t3 goes for 30-45 bucks(depending if it has lines on it) are you set on using the t25 or are you willing to switch turbos?

esteinmaier · Post by **esteinmaier** » Wed Mar 11, 2009 12:11 am

Even an ebay turbo would be a better start. That's a goofy flange, and when you upgrade later, at least you can upgrade one part at a time. I had a 20g on that manifold and had plenty of room, so you could go quite a bit bigger as long as you are willing to do a warm intake and put the filter right on the turbo.

As always, feel free to contact me if it's application specific questions. Anything that would benefit someone else later, go ahead and post the question though.

Addicted2Boost · Post by **Addicted2Boost** » Wed Mar 11, 2009 12:31 am

n20sxt wrote:idk bout you but around me a junkyard t3 goes for 30-45 bucks(depending if it has lines on it) are you set on using the t25 or are you willing to switch turbos?

one of my buddies gave me this turbo its really mint condition no shaft play at all I want to get a t3 but i dont know what to do with this

n20sxt · Post by **n20sxt** » Wed Mar 11, 2009 12:37 am

Addicted2Boost wrote:one of my buddies gave me this turbo its really mint condition no shaft play at all I want to get a t3 but i dont know what to do with this

Throw it up on ebay or craiglist (honda kids will eat that shit up) and see if you get any offers, specially if you got it for free. Or just keep it and hang on your wall or something

Check out the TA0301 Garrett/ air research turbo. It is pretty well suited for a neon: 7psi internal wastegate, suited for 1.5-2.2 liters making 150-250hp total( same turbo i have, no clearance issues) and you can yank it off a old Mercedes if you have a junkyard around you.

Addicted2Boost · Post by **Addicted2Boost** » Wed Mar 11, 2009 12:45 am

i was thinking of having someone weld the turbo to the manifold they have new ones on ebay for 150

Arro · Post by **Arro** » Wed Mar 11, 2009 4:12 am

Addicted2Boost wrote:
racer12306 wrote:welding cast iron = PITA

i would get the right manifold
this is a dsm turbo they dont make t25 manifolds

I could have told everyone that from the looks of it. Round turbine inlet, right? Yeah the turbo's oriented wrong, and yeah, you'd need a mitsu flange on the manifold.

Mitsu flanges have the rectangle reversed from Garrett... Garrett is wider, Mitsu flange is taller but narrower.

For that manifold, get a T3 off of Ebay like was suggested.

BlackRoseRacing · Post by **BlackRoseRacing** » Fri Mar 20, 2009 5:06 am

Your manifold is fine, the "FREE" turbo is your headache.Get rid of that turbo unit and use the money from selling it to get a T3 turbo unit.Heck, head on over to an older FWD dodge forum and get a T2/T3 turbo unit with no shaft play for cheap and use that.....

Addicted2Boost · Post by **Addicted2Boost** » Fri Mar 20, 2009 7:07 am

can a mod lock this im all set i bought a new big turbo

hul kogan · Post by **hul kogan** » Fri Mar 20, 2009 8:49 am

Locked at OP request.