[dp2275]

hey everyone, just got my bmw on the dyno yesterday. it put down 352hp and 372ft/lbs at 18psi even with wheel spin on the dyno. im using a 62-1

heres my problem...power peaked at 4700 when it shouldve peaked at 6000. the turbine housing is obviously too small as my manifold backpressure was sky high and the turbo manifold was glowing red.

i need to upgrade to a larger housing, but im not sure of ANY specs on my 62-1. the only things i know about it are
-big shaft w/ 360* thrust bearing
-62mm inducer
-65 exducer
-.58 split tang turbine housing

i checked the turbo over and didnt find ANY part numbers except '22143' on the compressor backing plate. how do i know what trim my turbine wheel is without pulling the turbo apart(so i can order a larger housing).

also, if anyone has recomendations for what size turbine housing i should upgrade to, let me know! motor is a 2.7L with 7.9:1 compression, full tubular manifold, and some serious port work. ill be upgrading to a much more aggressive cam soon so i need to sort this out asap!

[Robert]

There should be a serial number on the compressor backplate that starts with "T-2_______" If you can give me the serial number I can ask the support guys to check the unit in the build computer and tell you what wheel it has.

[dp2275]

There should be a serial number on the compressor backplate

interesting, i checked and didnt find anything. im away at college for the week so ill rip the turbo apart this weekend and get back to you. thanks!