badgti Posted October 15, 2008 Share Posted October 15, 2008 was wondering , is it possible to replace the twins on the rb26 with two s15 turbo's. any mods needed for this .anyone tried this combo yet? Quote Link to comment Share on other sites More sharing options...
usmcgetsome Posted October 16, 2008 Share Posted October 16, 2008 look into the GARRETT GT28RS in twin application. That is the most popular upgrade turbo. Quote Link to comment Share on other sites More sharing options...
badgti Posted October 16, 2008 Author Share Posted October 16, 2008 look into the GARRETT GT28RS in twin application. That is the most popular upgrade turbo. thanks for the tip. whts the potential for these turbo's , can i use it on a stock r32 rb26dett while maintaining reliability to a certain point.? Quote Link to comment Share on other sites More sharing options...
usmcgetsome Posted October 17, 2008 Share Posted October 17, 2008 i wish the rb26 guys would chime in. From what i remember it's a direct bolt on. Verify it by checking it's flange size such as t28 or t3. Anyhow, they pump out good air for the 26 in twin application. If you did it single turbo app. it wouldn't do much for you at all. Very reliable turbo. It is if i'm correct the silvia s15 turbo as you stated. do an ebay search and get more info about it. Normally people tend to go big single turbo and manifold. Allows more room and more power but can be laggy if you don't check your compressor maps. Quote Link to comment Share on other sites More sharing options...
cheftrd Posted October 17, 2008 Share Posted October 17, 2008 The only thing that "bolts on" is the exhaust housing to the exhaust manifold. The RB turbos have a "tucked up" style exhaust housing, meaning the center of the shaft is closer to the turbine flange. The S15 turbos will hang a little lower. The holes that are in the 26 compressor housing where the oil and coolant line junction bolt to are not there. The turbine housing outlet flange is different. The compressor housing outlet is different (three bolts instead of the 26's two, and I believe the compressor inlet flange is clocked a little different. Hope that helps. Oh yea, and the inlet to the S15 exhaust housing is full size, where the RB manifolds are choked down to about 2/3. This kills gas velocity into the turbine and makes them quite laggy. Quote Link to comment Share on other sites More sharing options...
badgti Posted October 19, 2008 Author Share Posted October 19, 2008 so,GARRETT GT28RS in twin application is still the best on the rb26? Quote Link to comment Share on other sites More sharing options...
cheftrd Posted October 19, 2008 Share Posted October 19, 2008 so,GARRETT GT28RS in twin application is still the best on the rb26? Depends on your definition of "best". Guy I know has a GT-R that goes 8's with twin IHI RHX6's... Quote Link to comment Share on other sites More sharing options...
Careless Posted October 20, 2008 Share Posted October 20, 2008 Depends on your definition of "best". Guy I know has a GT-R that goes 8's with twin IHI RHX6's... saw a twin IHI RHX6 kit with RB26 manifolds on ebay about 8 months ago. 7000 bucks though :-/ Quote Link to comment Share on other sites More sharing options...
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