Turbos for an LT-4

[deuce_454]

Ok guys here is another what turbos to run.. I have been rambling about turbos for quite some time and this has inspired a friend of mine to run with the idea, and i offered to help.

The car is a 31 ford roadster btw. The engine is a 95 LT4 with speedpro blower/turbo pistons, crower rods and TFS heads, stock intake and large TB. the engine is running a procharger with a 2 core intercooler as of now, but we have decided to jump into the deep end and mount a pair of turbos.. we have decided upon a set of schwartz cast manifolds (there is a canadian guy on ebay that sells some simmilar ones for 700, but support the supporting vendors right??(that and the schwartz ones look prety good))

here is the question, what size turbos would be right for that car, we intend to run boost in the .7 to 1.1 bar range perhaps more but it is more inportant that the turbos spool up quick and the car launches from standstill at idle than boost hitting at 4000 rpm..

the tranny is a level 4, 700R4 and the rear is a 3.5:1 jaguar IRS and the car sees alot od street miles, and is punished frequently in intersections and raced (1/8 mile drag) every 3-4 weeks..

i have found some turbos that are availabl ereasonably cheaply here, one is a TO4S, T5 COMPRESSOR WHEEL, COMPRESSOR HOUSING A/R .60 and the other one is

COMPRESSOR WHEEL SUPER 70 60.5mm ( same as Garrett T61)
TURBINE HOUSING A/R .84 COMPRESSOR HOUSING A/R RATIO .70

are they to big, should we be looking at a pair of t3 instead??