I've got an 87 IROC-Z with a new 305 TPI (0 miles on engine 115000 on trans) put in with World Torquer 305 SR heads it's been dynoed at 265 horse and 323 torq.....the 78 Trans Am is a 400 carbed with 128000 miles on it with no mods.....hypothetically who would win from a stopped position.....

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1987 IROC-Z
G92, LB9 305 TPI, 3.23, Bright Red with Carmine Interior, Pioneer DEHP47DH CD deck.2 JBL DS645 4*6 (F).. 2 JBL DS965 6*9 (S).. Soon to get new 305 TPI

 

I am not expert on second gen TA's but those engines were suffocated by smog equipment. I don't think those 400 cubes produced even 200HP, so you should have no problem with it.

 

thanx budd that kinda sux for a 400...hum

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1987 IROC-Z
G92, LB9 305 TPI, 3.23, Bright Red with Carmine Interior, Pioneer DEHP47DH CD deck.2 JBL DS645 4*6 (F).. 2 JBL DS965 6*9 (S).. Soon to get new 305 TPI

 

I do believe that those 400 Pontiac motors in 78' made 200 horsepower stock. However, if on his hood scoop says "TA 6.6" it has 220 hp due to higher compression. Either way, your gonna beat him pretty good.

 

The 403 Oldsmobile (6.6L) V8 made 200 horsepower. Yes, those motors were extremely smogged down. I built my 403 to 320 horsepower with a cam/heads/intake (among other mods too), and I love that motor, plenty of torque....then we have the 400 Pontiac.....

The 400 c.i. made 220 horsepower, thus the "T/A 6.6" hoodscoop decal.

I think you will spank that T/A like a 2 dollar hooker...

-ws6formula-

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1989 Pontiac Formula WS6
69,000 miles.
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305 TBI, 4.10 gears, SLP Zexel/Torsen Limited Slip Differential, 700r4 Corvette Servo, LT4 Hot Cam/Valvesprings, GM Aluminum Driveshaft, 2700 RPM Stall, Edelbrock Performer RPM intake manifold, Turbocity TB. Ran on 6-19-2001 again: UPDATED: 14.1 @ 97.68 mph. Dyno'd Bone Stock @ 172.6 rwhp, 266 ft-lbs. of rw-torque.

 

Like someone else said,That car for that year is pretty much a smog dog,You should win easily.

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82 firebird with 305H.O.,Block bored .30 over,Keith black hyperutectic flat top pistons for 10 to 1 compression,Turned crank,Magnafluxed connecting rods,Melling H.V. oil pump,and double roller timeing chain,Ported and shaved heads w/3angle valve job,Z-28springs,Summit push rods and comp cams magnum roller rockers,Ported Edelbrock performer r.p.m.intake,Carter 625 afbcarb,Accell spark plugs,wires,and H.E.I.super coil,Heavy duty cap and rotor,Clevite performance cam with 450-460 inches of lift,Comp cams lifters,700r-4 tranny rebuilt with trans-go rebuild kit,corvette servo,New torQue converter,Flowtech headers,Flowmaster muffler,3.73limited slip rear end,Energy suspension bushings from front to rear,Energy suspension tranny mount,New center link,ball joints,trans-am steering box,ASP power pully.

 

I don't know if I caused any confusion like I usually do...but I was siding with the TPI over the 78 T/A. With a modified TPI...HECK YEAH, you will beat that 400. I never meant the 78 T/A would beat you. I would not be so dumb. I've had my 403 in a 86 Firebird, with a TH400, and it twisted the driveshaft...then we cut the car in half and took it to the yard, so I don't know if it can outperform a modified TPI. Most likely not. But it was engine-dynoed around 320 horsepower when I was done with it. Now it sits on my porch awaiting a new chariot to power. Oh well.

-ws6formula-

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1989 Pontiac Formula WS6
69,000 miles.
------------------------
305 TBI, 4.10 gears, SLP Zexel/Torsen Limited Slip Differential, 700r4 Corvette Servo, LT4 Hot Cam/Valvesprings, GM Aluminum Driveshaft, 2700 RPM Stall, Edelbrock Performer RPM intake manifold, Turbocity TB. Ran on 6-19-2001 again: UPDATED: 14.1 @ 97.68 mph. Dyno'd Bone Stock @ 172.6 rwhp, 266 ft-lbs. of rw-torque.

[This message has been edited by ws6formula89 (edited July 28, 2001).]

 

Race him then you will know for sure.