Help me choose twins for my 7M

[figgie]

i think you need to raise the oil pressure a bit to compensate for both turbos. You might try to shim the oil pump and add another quarter of oil.

no

if the turbos are ball bearings, they require oil restriction on the inlets. A simple y split to the turbos should work fine.

 

[Kristian_Wraae]

Ok, and if they are not ball bearing?

Someone offered me a set of Garrett TB2531 turbos. They are journal bearing turbos. The 2.3L Saab 9000 used one of these to get to 200 hp.

I don't know much about them but I can get two for next to nothing.

The A/R on the exhaust housing says 0,49.

The good thing about them is that the exhaust port is very compact making it easier to fit them on the tight HKS manifold that I have. The down side is that it will not be possible to exchange the turbos for Garrett ball bearing turbos later on without making new downpipes.

Any idea how two of these Garrett TB2531 turbos will work on a 3.0 liter engine?

 

[Kristian_Wraae]

They look like this:

http://cgi.ebay.com/ebaymotors/Rebu...018QQitemZ280240772830QQrdZ1QQsspagenameZWD1V

I can get two for $400

 

[figgie]

No clue.

Older T series based turbo.

 

[Kristian_Wraae]

Someone told me they will be good for around 500 rwhp at 1.2 bar.

I think I'll get them as a start and then later exchange for some newer turbos if I feel the need for that.

 

[a_sesshoumaru]

i think your idea is worthy but with bigger turbos, the twin turbo idea should be ment to get more than 600rwhp, otherwise you could do it with a single set up. Try with turbos with bigger compressors.

 

[Kristian_Wraae]

I just bought two brand new Garrett T25 turbos.

They are rated around 250 hp each. So that should get me into the 400 hp range.

I really don't want more than that since 240 hp already scares the shit out of me.

But the route has been chosen:

7M-GTTE it will be.