Hey guys, I'm going to eventually later this year convert my current nitrous LT1 over to a single turbo. I don't know a whole **** ton about turbo's but probably enough to be dangerous. I've been talking to DrTurbo over PM's from ForcedINductions and i'm leaning towards buying a turbo from them.... Wanted to hear everyone's recommendations on what turbo on my setup would be best based on my goals and expectations.

MOTOR
383 ci LT1-half filled block, 4 bolt splayed mains from Pro-Gram engineering
3.75" stroke Lunati crank
6" oliver rods
JE pistons (currently 12:1 but will be buying new dished pistons shooting for 8.5-9:1)
solid roller cam from comp (248/260 .704/.685 114.5lsa) nitrous cam from 2nd streetspeed
Canton pan
AFR 227cc fully ported and polished reverse cooled heads (flowed low 320's@700, mid 240's exhaust)
Jesel shaft rockers (1.7int, 1.6exh)
Nextec pacalloy springs (i'd have to look at pressure on the seat from my build docs but they are monsters)
Victor EFI converted single plane intake
Accufab 4150 4 barrel throttle body
Reher-Morrison vacuum pump
ATI Balancer

ENGINE MGMT/ELECTRONICS
Fast XFI with datalogging and wideband capability
MSD Digital 7
MSD HVC II COIL
Rear mount distributor
MSD crank trigger

FUEL SYSTEM
Nasty tank
Aeromotive black eliminator pump
10AN feed, 6AN return lines
83lb injectors currently (2 stages dry nitrous) but will go 160lb with turbo
fuellabs regulator

TRANSMISSION/DRIVETRAIN
ATI TH400 RMVB with transbrake
4200 stall 9" ATI FUEL/BLOWN CONVERTER
Denny's nitrous driveshaft
Moser 9" 35 spline axles, 3.89 gears, backbrace, detroit locker (goes 1.33's with ease)

SUSPENSION
pretty much everything....

CURRENT PERFORMANCE
9.06@153.8 1.35 60' (best 1/4) 3400lb raceweight
5.76@122.1 1.33 60' (best 1/8)
811 RWHP (300 shot) ran 350 at the track

DESIRED PERFORMANCE
8.20@170 3200 raceweight
1200RWHP+

When I ran a 400 shot we lifted a ringland a bit. The #2 cylinder was down on compression a bit and i think it was having oil control issues anyway. We're going to put a piston in it, fix it and go for the LT1 nitrous record at 8.95 currently. I think we can run 8.80's full tilt. So once we get the record i'll start converting the car over to turbo, freshening the motor and ordering new pistons that are low comp. I'm looking with this new setup to make around 1200-1300 RWHP and i'd like to see low low 8's out of it. The car is a full racecar but is a tad heavy and I will be putting it on a diet when i go turbo. Lexan glass, removing weight out of the doors, fiberglass hatch, joe van o wing, etc..... It's currently 3400 with me in it and i'd like to see it at 3200 or less.

I want to run the turbo up in the nose of the car like what Wormboy had when he was single turbo. I'll move the radiator somewhere and I intend to use the tubular nose support that Steve Burger is selling right now to mount the turbo to. Car will most likely be motorplated as well. My turbo choice at this point was probably going to be the EZ-94X billet from FI.... I know that DrTurbo recommended possibly a 98mm. My car currently has an 8.50 cert. I want to see how fast the car is and then weigh my options from there on 25.2, 25.5 etc. I know it will go faster than 8.50 at 3200 lbs so i'll cross that bridge when I get there....

So what would your recommendations be on turbo? and your reasons? any spooling issues i might have with only 383 ci? What about the turbo being so far out front? Does that change anything with response or spool time? Also i've looked at some cam specs for turbo's and my current cam doesn't seem to be that far off. It's a 114.5 lsa and i've seen alot of turbo cams running 115 or 116 lsa's.. Wondering if I should just keep the cam in it and see how it does.

 

nobody in the forced induction section has any ideas??? come on i know we got some smart fellas..

 

I still stick by the 98mm .

 

Get out of my forum fawker.


LMAO

 

what avengeance said .. theres only so much room for nor cal ls boost heads !

 

A 94mm wouldnt be big enough?

 

T67

 

Yeah the EZ94X is big enough....but I like to leave lots of room.