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Engine Specific Info and Questions => IDI Engine => Topic started by: the4ork on November 26, 2007, 01:51:31 pm

Title: 45 trim t3/t4?
Post by: the4ork on November 26, 2007, 01:51:31 pm

going to go with a bigger turbo on my diesel... wondering if a 45trim t3/t4 /w .48 and stg1 wheel will be too big...

it will have a giles pump so i have 5k rpm to play with, i'd like to be at least seeing a few psi by 3k rpm, looking to boost 25psi

the 3 turbo's ive had in mind are a t3 .60 on the small side, super 60 and 45trim t3/t4...

oh the choices

Title: 45 trim t3/t4?
Post by: vanagonturbo on November 26, 2007, 08:26:43 pm

you are going to need a ball bearing turbo. Dont waste money on buying a turbo if its not ball bearing. My GT25r sits on my toolbox yelling at me everyday.

Title: 45 trim t3/t4?
Post by: flapjack on November 27, 2007, 03:54:33 am

have you tried a calculator like this?
http://www.not2fast.com/turbo/glossary/turbo_calc.shtml

Title: 45 trim t3/t4?
Post by: the4ork on November 27, 2007, 01:56:41 pm

yeah but its hard to say... whats the volumetric efficency? where do you tell it your compression ratio? what air/fuel do i tell it...

its hard to use

Title: 45 trim t3/t4?
Post by: 935racer on November 27, 2007, 02:57:13 pm

If you don't want to dish out the bling for a BB turbo than go with .48 ar on the turbine, sgt 1 wheel and a t3 compressor, .42 ar and either a 45 or 50 trim.