zchs21

i am new to ht and am looking for information on what size turbo for a stock b18b about 50XXX miles on it. i was looking into a t3/t4 turbo but am not familiar with all the different sizes and what they actually mean. any info is appreciated. thanks.

InfamousDC2FI

check out the huge ls turbo thread 108 pages and still growing strong: https://honda-tech.com/zerothread?id=1323059

The rundown of turbo trims basically is split into two sections:

1-

- Compressor trim

This is basically the measurment of the compressor wheel itself. The lower the number the less cfm of air it will flow.

- Compressor housing

This is the actual physical peice that goes over the compressor wheel. Like the turbine housing, it is measured in a/r's, which basically just tell you the size of the housing. The larger the number the larger the housing.

2-

- Turbine wheel trim

The turbine wheel trim isnt always mentioned, but most commonly there are 3 stages of turbine wheels (stg 1, stg 2, stg3) . Each has a different number of fins and size.

- Turbine housing

This is the piece that goes over the turbine wheel and is measured in a/r's like the compressor housing. The larger the number the bigger the housing. The smaller the number the quicker the spool and vice versa.

Please correct me if i made a mistake.