What's the biggest turbo I can put on my rb20 engine in my vl calais got a rb25 turbo in it at the moment I want big power what's something big I can put on it

Gt3540 with a .84 rear housing work well on a rb20 mate of mine made 260rwks with one stock motor to

lol 2 create big power u gonna have lag , my mate had a rb20 , high mount with rb25 hiflo , plenum , cams , cam gears microtech injectors , made 440 hp atw , got the rear housing changed n made 390 hp atw but alot more down low , put some 4.11s gears in it n head n cam work , fuel system n e85

3540 is way to big for a RB20, youll need something along the lines of a 3071r which is still even pushing it

There's heaps of work done to the engine got a ford nine inch diff? Runs low 11s?

a guy i met had an R32 with an RB20 making over 400rwhp on stock internals with a highmount (sorry cant remember what size turbo it was) Although ur at the limits of an RB20 with that power

I'd just stick with the 25 turbo... They're good for great top end and the 20 is a torque monster to ebgin with so should be an amazing power curve with the for 9".

If your after power an RB20 is the long and hard road to travel. Personally I would start with a better power plant eg RB25, RB30. If your talking turbo engines then you need capacity. Your buying all the right gear for the wrong engine. You may have vested interest in your engine, but your kidding your self all the same. You will be pushing reliability and chewing your fingernails down to the bone making figures that can be obtained with half the funds and materials and still give the engine long life. Dont want to rain on your parade but its an RB20 and your after power, do the math.

This could work, but you'd probably need to get a custom manifold made for it, and maybe need to low mount it too. [IMG] [/IMG] Some original photos have not been recovered yet.

GT2530r is a good match for the small capacity RB20 or if a little more lag isn't a problem then a GT2871r.

Hahaha a 3540 is to big its a baby turbo itself but each there own

If boost starting at 4500rpm and full boost by 6500rpm is your thing then by all means....

Quote: Originally Posted by SHIZNT [View Post] If boost starting at 4500rpm and full boost by 6500rpm is your thing then by all means.... It sure is id rather have boost later and feel real power than what a t3 does my rb30 starts boostn at 4000 now with the gt42 but when comes on its a kick in the ass

Hey, that's all cool for dyno figures and running down the quarter mile (like your KE20) but I'd rather a GT3540 with .86 rear for driving on the street with a RB30. Same as I'd rather drive a RB20 with a GT2530r which will provide a nice linear power curve.

Quote: Originally Posted by SHIZNT [View Post] Hey, that's all cool for dyno figures and running down the quarter mile (like your KE20) but I'd rather a GT3540 with .86 rear for driving on the street with a RB30. Same as I'd rather drive a RB20 with a GT2530r which will provide a nice linear power curve. Fair enough mate thats what makes us all different

The perfect Turbo would be a xr6 Turbo IMO (nothing that same 4.11 diff gears wouldn't fix) a nice external gate would sound awesome too, or a t3t4. There's a vid on youtube with a s13 rb20 t3t4 ex gate sounds and goes awesome IMO check it out Some original photos have not been recovered yet.