WesM951

Just wondering what size of T04E everyone is running here. 50trim? 57trim? Bigger?

I was planning on going with a 60-1, 60lb/min T04E but I think i may go bigger. Given dyno charts i've seen here.. my goals will not be acomplished with a 60-1.

Edit: Just to clarify, a 60-1 turbo flows 899CFM @ 1bar.

pk951

The 60 to 1 HFI is that the one you refering to? I think it comes in a to4b housing?

WesM951

Not the hifi, the hifi is a smaller turbo IIRC. You can get a 60-1 in a T04E or T04B housing.

Mike S

Seems like the popular choices are:

50, 57, and 60. I personally run a 50 trim with #8 hotside.

lart951

I am running the Lindsey super 61 T04e polished with 8 housing.

Porsche-O-Phile

t04e/0.50/stage III

Not yet installed. But soon.

Eyal 951

Haven't installed mine, but its a T04E .57 trim, replica 8 hotside with water cooled center. Also has custom work to the intake side to match it to the 951 engine well.

Porsche-O-Phile

What kind of "custom work"? To the housing or the wheel?

Rock

Im running a k26/6 !

WesM951

Interesting.. what size/stage turbine wheel?

50trim flows 47lb/min and is a 54mm Compressor wheel.
57trim flows 49lb/min and is a 56mm Compressor wheel.
60-1 flows 61lb/min and is a 60mm Compressor wheel.


Of course there are tons of diffrent types of turbos, using diffrent types of turbine wheels. Stage 3,5, and P Trim.

I'm trying to get a feel of what turbo I want to go with, I may try something diffrent as well.

Eyal 951

I dunno, it was a "secret" upon purchase. Work done to the wheel, I don't know about the housing or anything else.

Not that I know what it means, but mine is stage 3 wheel as far as I can recal. (I really am under educted on turbo stuff. Someone teach me what .57 trim actually means!)

WesM951

I am thinking about going with a Dual Ball Bearing T04E 56trim.

56trim flows 65lb/min and is a 61mm Compressor wheel.

(don't ask me why the 56 trim flows more than the 57 trim)

Then again, I may go big...

63trim flows 75lb/min and is a 67mm Compressor Wheel. (basically a T04R shoved into a T04E housing ) For comparison's sake.. it flows 1088cfm at 1 bar

WesM951

I'm still learning. I think the "trim" is just a refrence to what size of compressor wheel it has. Most of the time they are pretty close.

Porschefile

How much power are you aiming for?

Mike Murcia

"Trim" is just a ratio of inducer and exducer diameters on the compressor wheel. For example, a compressor with a 54mm inducer and a 76mm exducer comes out to be about a 50 trim. At the same time, a compressor wheel with an inducer of 45 and an exducer of 63mm is also roughly a 50 trim, but would not perform the same.

The trim equation is:
((Inducer diameter^2)/(Exducer diameter^2))*100

Because trim is just a ratio, a 56 trim can flow more than a 57 trim.