toysruskid

I've been following ls1 tech forums for a few months in hopes of up grading my 99 t/a with a turbo,but with Pennsylvania's new emissions laws which make it almost impossiable to tamper with the OBD11 systems,Im back to an older project that ive had sitting in around the passed few months,its an 88 firebird mini tubbed the fit 28 13.50 mt's narrowed 9 inch rear, full 12 point cage,manual turbo 400 trans with a brake,and engine of choice is a 454 that was to have a roots blower on it.

I,ve been bit by to tubro bug after see you guys make awsome pwer wtih them and was hoping to get some info on what size turbos i might beable to run on this motor,hear is a few quick specs on the motor as of now

world products block,4 bolt spladed billet caps
callies billet h beam rods
callies billet crank
ross blower pistons(yeilding 7.50:1 comp with 120 cc chambers
afr 345 heads
cam, as of yet not selected
iam new to turbos and any help would be greatly appreciated

gogogadgetcar

for a twin setup T-61's or T62-1's would work for 10 to 20 psi. How much power you trying to make?

Keith

I think the parts mentioned could EASILY make 1000 hp at the flywheel.

MYTURBOT/A

That big block is going to move alot of air with them heads, and the low compression and forged internals will take alot of boost so i`d go with somthing that will support the motor if you decide to crank the boost them world blocks will take a lot of punishment. so IMO you should be able to push up to 30PSI to that motor. I`d go with at least a pair of precision T72s. but thats just my opinion.

MYTURBOT/A

with the cam you need a cam with fast open and closing ramps to keep from bleeding off boost with a turbo so a roller cam is definatly in your future if you want to go all out power.

Malicious

iTrader: (1)

Heh definitely, you're going to need one big turbo or 2 fairly big turbos to push air into that beast to make power. Single 106mm turbo would be lovely. 2000+ horsepower anyone? =P

CHRISPY

Twin T76's

Jammer

iTrader: (1)

You all a scaring me. Are twin p-trim 60-1 to4b's gonna be able to push my 370 iron block to 20+ lbs? Oh man.

gogogadgetcar

60-1's should work ok for you jam, they hit the copressor map pretty good from 4000 to 7000 rpm's

Jammer

iTrader: (1)

Thanks gadget... too damn much to learn about too damn many turbo options out there.

toysruskid

I would like to thank everyone for all their help ,and will post pics and updates in the near future for everyone to see my progress