My RX Sedan was delivered today to have a better exhaust header made and fit up a smallish Garrett BB turbo .

 

The fabricator is going to see if he can have both pipes run up to the turbos mount flange but if too involved it will have a collector and single up pipe .

 

The decision was made to make this header out of 16 gauge stainless steel and the tube OD will be 1 3/4 inch . I can't exactly remember what sized tube Techworks use on their EA82T header but suspect it was possibly 1 7/8 inch .

 

The turbo I'm using is a one off that started as a GT2554R but its had the usual GT25 turbine changed out for the GT28 NS111 like some of te HKS units and the GT2860Rs uses . The turbine housing itself is from an S15 Silvia (200SX in OZ) and in high temp material .

The Garret turbos have the water fittings either side of their center section unlike the original IHI VF2/4 and the turbo will be placed where the inner banjo bolt can be removed - unlike the lower std one - and the supply water line won't need to run under the turbo where its hard to reach .

 

With luck our header will be a big improvement over the POS std one and the turbo a good upgrade too .

 

The engine it's going on is a freshly rebuilt Oz spec XT4 Spider Turbo unit that has a bit of porting and slightly warmer NA MPFI cams in it , the CR was raised slightly to ~ 8:1 because every little bit helps .

 

Fingers crossed this should help uncork the L's Rzz and let it breathe and rev better .

 

Should be back next week , cheers A .

Edited October 22, 200916 yr by discopotato03

My header is finished and the detail work on plumbing a non std turbo is taking place .

 

My header was made of 1 3/4 bore stainless tube and is equal length , slightly longer loop on the turbo heads side than the TWE one .

Also mine joins to a single tube just before the turbo flange and when unbolted comes out easily .

 

Should be running tomorrow , cheers A .

TTIWOP

Here are some progress pics that disco sent to me

 

 

Edited November 2, 200916 yr by ausubaru92

Looks Good, I'll be interested in what kind of improvement you see. I've been plannin' to do something similar to my 88 GL T. I'm not gonna' go for equel length, but as short as possible to the turbo. Every thing I've read says, equel length scavanging falls away as the boost comes up. Still, I think you should see some noticable gains. Keep up the good work, Steve.