75/92 Birdman

iTrader: (4)

Just had to do it, Chris! :lala: :lala:

What do you guys think?

My 79 TA, 400, .04 over, decked block, milled 6X-4heads, 3-angled, TRW slugs, Edelbrock Performer intake, .284/.296 duration cam, .465 lift, Tri-Y headers 4-spd,3.23 posi, no heater or air or inner fenders, or most of my interior.

Chris's badass 89 IROC, redone heads, 3-angled, ZZ4 cam, redone intake, SLP headers and y-pipe, and a bunch of other stuff that Chris can tell you better about.

I know his can will snap your neck back, but my car is in pieces in my garage.

Hey, this is the theoretical board, right.?

IROCZTWENTYGR8

iTrader: (1)

His IROC-Z.

75/92 Birdman

iTrader: (4)

Ouch, no love for the 2nd gens here, huh?

phoenix305

why is the cam in the 400 so small?

75/92 Birdman

iTrader: (4)

Cam isn't that small for a Pontiac. It is the biggest Poncho cam Summit offers.

I got the specs wrong. Here they are:

.282/.292 duration
.465"/.472" lift with 1.5 rockers. Might go bigger on the rockers, don't know if I want to have that work done to the heads right now, though.

This cam is recommended to have a 2500-3000 stall with an auto, but I'm running a 4-spd so I'll be fine.

Eventually I'm gonna build an aluminum headed 462 for it, but for now I'm running what I can afford.

406TA

I'll say the '79 T/A. The TQ of the 400 will send the IROC to defeat!

1981z28

got it all the way. if it runs good hes dead they dont make them like the use to. those 400 big block where no joke my 1981 z28 350 back when it was stock i could not beat them.

Marc 85Z28

iTrader: (3)

Your Z28 had all of 180HP and weighed over 3700lbs! Like all engines of that era, performance was a joke. Stock 400ci TAs, with the 4 speed HO version were high 15 second cars. Lower HP autos were as bad as an LG4 3rd gen.

Judging by my coworkers past experience with his 78 TA, I think it will make a good race.

BTW - Pontiac never made a 400 big block

75/92 Birdman

iTrader: (4)

My car turned a mid 13 with the current motor which is basically stock other than a mild cam.

1981z28

well i guess thats y my buds 1979 trans am has a poniac 400 big block in it no not a olds 403 a pontiac 400 big block.



http://www.iwaynet.net/~gl&lisk/1979ta.html

yes pontiac did make 400 big blocks in 1978 and in 1979

75/92 Birdman

iTrader: (4)

Nope, it isn;t a big block. All Pontiac motors are the same size, no small block or big block. It can technically be classified as a midsize block, but A Pontiac motor is a Pontiac motor.

It drives me nuts too when people call Pontiac motors big blocks, but I figured I on here with my 2nd gen, so I'll leave it be.

1981z28

u can call it what u want but all the places and books and mags i have seen call the 400 a big block.

350 TPI

iTrader: (2)

What he says is true about the 400 not being a big block.When i had a 79 T/A i made the mistake of calling it a big block.Arent the 301 and 400 the same block?

75/92 Birdman

iTrader: (4)

If they call it a big block, they don;t know what they are talking about. It is easier to classify it as a big block because it is bigger than a small block.

Ask any Pontiac guy and he will tell you the same thing I am saying.

And the 301 and 400 aren;t the same block, but dimensionally similar. They share a bunch of the same things, but the deck height is a little different and everything associated with that is different. :lala:

SOLID LIFTER

I'm a "Pontiac guy" and I truly don't care what people call a pontiac motor. Pontiac motors never came in big block or small block or "mid sizes". Whatever you want to call a Pontiac engine is fine by me, be it a small block or big block or a mid size( mid sized to what?) motor.
Pontiac motors arn't small or mid size they are closer to big block chevy size.

ddn69

those 2nd gen trans ams packed a pretty good punch. But *** were they awful on gas. My friends dad has one with a blower. Lets just say its not exactly his daily driver. More like his special occassion garage car.

I vote for the 2nd gen.

Nate

Air_Adam

The 403 cars were pretty sad, but the 400 cars were hot stuff considering its showroom competition at the time. The Mustang had all of about 120hp, the Z28 had anywhere from 175-200hp, the Corvette had 190-220... The 400 TAs had around 200hp, so they were doing pretty good considering...

And its a "Pontiac block" not a big block
The 301 was a little different from all the others, but the 326, 350, 389, 400, 421, 428, and 455 were all based on the same block.

Marc 85Z28

iTrader: (3)

Buick, Oldsmobile, and Pontiac (commonly referred to as BOP) NEVER made small or big blocks. They are what they are. Do not confuse them with the size designation of the Ford, Chevy, and Mopars...

And the sad thing about performance in the late 70s - the fastest thing you could buy was an ugly @ss Dodge truck!!

nick418

Mustang had all of about 120hp


Are u serious?! THats it? WOW perfromance in the 70s were *** awful. WAS the king Cobra 5.0 120 hp? Or just a reg Mustang v6?

but my VOTE is on the IROC. I love those things!

Spectre

ISSUED: 31 March 1967
REVISED: 7-25-81, 3-1-99, 04-10-02, 02-03-03, 9-30-03
BULLETIN #: PONT-B&S Pontiac Bore/Stroke/Rod Length
Specifications for the Pontiac engines.
ROD
BORE STROKE DISPLACEMENT CYLINDERS LENGTH NOTE
3.339 3.130 110 4
3.501 3.625 140 4 5.700
4.002 3.010 151 4 6.050
3.500 3.000 173 6 5.700
4.063 3.750 195 4 6.625
3.620 3.310 207 6 5.700
3.750 3.250 215 6 5.700 1
3.500 2.800 215 8 5.660
3.736 3.480 229 6 5.700
3.875 3.250 230 6 5.700
3.800 3.400 231 6 5.960
3.563 4.000 239 6 7.562
3.877 3.535 250 6 5.700
3.500 3.385 260 8 6.002
3.750 3.000 265 8 6.050
3.375 3.750 268 8 7.565
3.750 3.250 287 8 6.625
4.002 3.010 301 8 6.050
3.736 3.480 305 8 5.700
3.875 3.250 307 8 5.700 1
3.800 3.385 307 8 6.002 2
3.938 3.250 316 8 6.625
3.719 3.750 326 8 6.625
3.898 3.622 346 8 6.100 5 @
3.939 3.563 347 8 6.625
3.800 3.850 350 8 6.387 3
4.057 3.385 350 8 6.002 2
4.057 3.385 350 8 5.885 4
3.877 3.754 350 8 6.625
4.001 3.484 350 8 5.700 1
4.063 3.563 370 8 6.625
4.062 3.750 389 8 6.625
4.125 3.750 400 8 6.625
4.350 3.385 403 8 6.002
4.093 4.000 421 8 6.625
4.125 4.000 428 8 6.625
4.153 4.214 455 8 6.625

Notes
1-Chevrolet engine 2-Oldsmobile engine 3-Buick engine 4-Oldsmobile diesel engine
5-346 LS1 Pont motor as used in 1999 models

Agent13

iTrader: (6)

:hail: '79