I have been told I am at the limit of my turbo so I thought I would throw this out and see what you think and what you would do or change, My car is mostly a street car, It rides like a Caddy, Has ice cold ac and gets good mileage but I do like to race it, Here is my build-
1987 grand national
3.8
J&E 30 over with total seal filed rings
Champion Stage 2 aluminum heads
1.65 shaft mount rockers
Comp part # 69-400-8 Cam
Girdle
Balanced
Eagle Crank
Eagle H-Rods
Hemco plenum
Accufab 70mm throttle body
Front mount Intercooler
73lb injectors
Meth Injection
Walbro pump,hot wired
200 4r with all the good parts
PI 5 disk converter,lockup at 126 mph
3.42 gear
LT1 mass air meter with translator
4" cold air intake
66 BB turbo, Cottons
TA performance headers
ATR 3" down pipe
Turbonetics delta gate mark II 6psi
Turbonetics boost controller
16 psi pump fuel
20psi race fuel
The best it has run on 100 octane and alky is 10.40 at 133, At 20-21 pounds of boost, Coming off the line at 5+ pounds off the foot break, One problem is it comes off the line hard but after 60 ft. it spins the Hoosier slicks just enough for the front to drop, my 60 ft in in the 1.50's, I have ready to put on a HRparts rear sway bar, small starter and a set of aluminum pulleys, I know I have missed something but hope this helps
1987 grand national
3.8
J&E 30 over with total seal filed rings
Champion Stage 2 aluminum heads
1.65 shaft mount rockers
Comp part # 69-400-8 Cam
Girdle
Balanced
Eagle Crank
Eagle H-Rods
Hemco plenum
Accufab 70mm throttle body
Front mount Intercooler
73lb injectors
Meth Injection
Walbro pump,hot wired
200 4r with all the good parts
PI 5 disk converter,lockup at 126 mph
3.42 gear
LT1 mass air meter with translator
4" cold air intake
66 BB turbo, Cottons
TA performance headers
ATR 3" down pipe
Turbonetics delta gate mark II 6psi
Turbonetics boost controller
16 psi pump fuel
20psi race fuel
The best it has run on 100 octane and alky is 10.40 at 133, At 20-21 pounds of boost, Coming off the line at 5+ pounds off the foot break, One problem is it comes off the line hard but after 60 ft. it spins the Hoosier slicks just enough for the front to drop, my 60 ft in in the 1.50's, I have ready to put on a HRparts rear sway bar, small starter and a set of aluminum pulleys, I know I have missed something but hope this helps