Correct me if im wrong but isnt a gt42 too small to run on top of a stock turbo in a twins setup ?
Gt42 in twins
- Thread starter 05dmaxdriver
- Start date
The compressor would be okay - it's the turbine side that is too small IMO. The S475 (a comparable compressor) with a T6 housing on a big turbine wheel will work better.
Thats what i was thinking , our local diesel shop did this to a truck i was wondering if it was "correct" for lack of a better word or not .
Both but mainly the wheel. With the S475 you just have alot more options on turbine wheel sizes. In T4 you can get an 83mm which is similar to a GT42 turbine (a little smaller IIRC) and good for a single turbo to be responsive; or the 87mm which will give up some streetability as a single but will make more power up top. If you step up to a T6 (what most people use for twins) you can get the 83, 87 or 96mm turbine wheels.
If they gated the GT42 it might do okay but still won't perform as well as a charger with a bigger turbine side.
THE 42 has been used before and as paul said it will work great for street/towing twins . Just make shure you get the loosest A/R possible .
I was under the impression that the 42 was too small to be the big turbo in a twin setup.
Our local shop did this to a kodiak and a week later it broke a pistion !
Our local shop did this to a kodiak and a week later it broke a pistion !
I doubt it was from choosing that turbo , i would have used a bigger turbo for that kodiak mainly because of the extra weight on board , it is going to need a bit more air then our trucks .I was under the impression that the 42 was too small to be the big turbo in a twin setup.
Our local shop did this to a kodiak and a week later it broke a pistion !