NastyontheNOS

There are lots of turbos to go with as you can tell but the things I look at are what the use is going to be drag, street, street/strip etc. Also what kinda horsepower you are looking to make if a modest number say 300hp is your range you are going to need a turbo that will flow enough CFM threw the compressor for that amount of HP and if response is key for the street a Mitsubishi unit may be the ticket. They have a superior turbine wheel and housing design and the right cartridge has lots of options to upgrade to from the popular 16G to the bad boy never stops boosting 20G. They work real well but if your looking at 400hp+ overboosting is a big problem with them, nothing a external wastgate can't take care of but overboosting means restriction, and restriction equals loss of HP. Hear is where we get into the old school proven time in time again Garrett T3/ T4's. When you talk about the Garrett units there are lots of options exhaust housings regulate the spool time but more so it regulates the amount of backpressure your engine is going to produce. If you build a turbo that flows 630+CFM you better be able to get that out of the header thew the turbo and out the down pipe quick, and T3's offer a few type's of exhaust wheels and turbine housings to let you flow out the exhuast. I mix and match housing and wheels regularly for differnt hp goals and personally build what I think are the trickyest Hybrid turbos in the southeast, you never know whats going on inside my turbos. The T-25's IHI's and so many other 's will work but the most popular and sensable are the ones listed give me a call if you would like more info and or sizing best for you.

Alex Costa
Precision Machined Engines
1-800-665-0405