Turbocharger Guide

COMPRESSOR SIDE

Features of Note: On the left is a Limt Engineering TA-33 for a "hot air" car (1984/85) and on the right is the stock turbo The TA-33 is a Garrett T3/T04E hybrid using the larger impellers in the stock housings The stock turbo flows ~390 cfm at 15psi while the TA-33 flows !700cfm The TA-33 is basically the same configuration as an intercooled car's TA-49, but the housings are for the hot air style mounting (and a tad less efficient as a result) Note the difference in thickness between the walls of the compressor housing Note the bevel inside the housing of the stock turbo is completely removed to make room for the larger turbine
TURBINE SIDE

Features of Note: Again, on the left is the TA-33 and the right is the stocker The pitch of the blades isn't changed much (to keep stock spool up characteristics) but the size of the exhaust outlet is noticeably larger. The turbine has a much bigger "footprint" on the TA-33 The wastegate hole has been slightly enlarged for better boost control

On the left is a Limt Engineering TA-33 for a "hot air" car (1984/85) and on the right is the stock turbo
The TA-33 is a Garrett T3/T04E hybrid using the larger impellers in the stock housings
The stock turbo flows ~390 cfm at 15psi while the TA-33 flows !700cfm
The TA-33 is basically the same configuration as an intercooled car's TA-49, but the housings are for the hot air style mounting (and a tad less efficient as a result)
Note the difference in thickness between the walls of the compressor housing
Note the bevel inside the housing of the stock turbo is completely removed to make room for the larger turbine

TA33 Turbocharger John Craig - Limit Engineering