Just a ball park figure on what my rear wheel hp and tq may be with my current mods?

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1990 Trans Am GTA 305 TPI-SLP Tranny Rebuild Kit w/ Mechanical Diode,Vette Servo, Transgo Shift Kit, Stock Vette Converter. Flowmaster Exhaust, Edlebrock Headers, 3 nch Dynomax Hi-flo Converter, K&N Cone Filter, TB Airfoil. Taylor Spiro 8mm Wires and Bosch Platinums. Pioneer DEH 4300, Audio control 24XS, PPI 500IQX and 200IQX Sedona Amps, 15 inch Kicker XPL Subs, and Kicker 4x6/6x9.

 

I would guess with no real HP or Torque Mods
you have 160 HP and 236 TQ at the rear wheels. You need some power mods. Such as Heads, Cam, and Intake to name a few. And your sound system is not a power Mod.

 

I have an '89 305 TPI and i made 170 hp and 240 tq at the wheels with just a catback,air foil,shift kit,and k&n filters. You have headers though,so that should give you a bit more...

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'89 IROC-Z 305 TPI

 

I would say 170-180 rwhp and 260-270rwtq

As for your 1/4 miles time proboly mid 15's

I put down 161rwhp and 267rwtq before the 3inch cat back.

I have the dyno graphs on my page in the sig

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91 RS Camaro 5-speed black w/t-tops 305 TBI now TPI
MODS: SLP cold air intake w/K&N, air foil,Accel 19 LB injectors, March aluminum under drive pullies, Alburn pro posi, Aluminum drive shaft, Random Technology 3'' cat-back, 8.5mm MSD wires, 160 thermo, jet fan swich, Custom chip with 91 vette computer, SSBC slotted rotors, optima battery in the rear, BMR adjustable lower control arms and panhard rod, Kenny Brown strut tower brace, TB bypass, no egr, no air