Hey guys,
I recently switched from the older style 5 bolt turbine housing to the newer Garrett 4 bolt turbine housing. With the 5 bolt housing, I was able to run a 3" downpipe right off the turbine outlet flange, using allen bolts for extra clearance.
It appears that with the 4 bolt flange, I will not be able to run 3" pipe right off the flange....as the bolt holes would be in the way of the 3" pipe. So, I am thinking of running 2.5" right off the turbo and then flare it out to 3". So, the downipe would be 2.5" for only about 1.5 feet.
Do you think this will hinder power any or is the short section of smaller piping negligible here because it is so short?
My other option is to use 3" piping off the turbo and heat up and indent the pipe where the bolts need room.
Thanks for your help,
I recently switched from the older style 5 bolt turbine housing to the newer Garrett 4 bolt turbine housing. With the 5 bolt housing, I was able to run a 3" downpipe right off the turbine outlet flange, using allen bolts for extra clearance.
It appears that with the 4 bolt flange, I will not be able to run 3" pipe right off the flange....as the bolt holes would be in the way of the 3" pipe. So, I am thinking of running 2.5" right off the turbo and then flare it out to 3". So, the downipe would be 2.5" for only about 1.5 feet.
Do you think this will hinder power any or is the short section of smaller piping negligible here because it is so short?
My other option is to use 3" piping off the turbo and heat up and indent the pipe where the bolts need room.
Thanks for your help,