I am lookin to build a pullin truck. Lookin' for 450-500 hp 14mm head,6x16 inj, question on what size turbo to run. I like to turn the motor 4000-4500? Any input would be helpfull.

 

Not sure on the turbo. You can get a 4200gsk to get the 4000. 1stgen.org has a lot of pullers on there if you are not on that site yet.

 

You can get to that HP with out the 14mm.. Are you going to run a sign.. or twins?? The first gens don't seem to dyno as well with the bigger exhaust housings.. but on a pulling track.. they seem to do Ok..
Bryan

 

I was going to run a big single like a pro52?