rb25dett T-28 for red-top question

[tnd240]

hi guys, i found someone selling their rb25dett T-28's. he says it bolt's right on to the red-top T-25 manifold (unlike the s14/5 T-28's)

is this true?? will i have to modify the oil and water lines, or is it a total bolt-on affair??

aside from the flange compatibility, are they actually the same spec T-28's as on the s14/5's?

thanks
J.d

[AKADriver]

There's no such thing as an RB25DETT.

The RB26DETT uses twin T28's. The spec is different than the SR20DET T28's.

SR20DET = 0.64 exhaust A/R, 60 trim compressor
RB26DETT = 0.48 exhaust A/R, 60 trim compressor

This turbo is really the wrong size entirely for an SR... It'd work nicely on a smaller engine (1.6L or less).

The RB25DET used a Nissan-made T3 style turbo that won't bolt up.