I need TTA engine info for the photo shoot

[Captain Mark]

OK all you smart guys. (I was gonna say smart a$$es, but that would be rude)

Anyhow, I am going on this photo shoot thing, and they are gonna make me fill out a huge tech sheet about the car. A lot of engine questions. Now my motor is stock with external bolt-ons. What info can you guys give me about:

TTA factory:
Pistons
cam
crank
rocker arms
comp ratio
stock head flow numbers

I think I know most of this stuff, but I want to verify so I don't screw up my part of the article.

 

[Lee_Burough]

Good luck Mark. I know there are some knowledgable people here. Until they chime in, here are a couple links to get you started:

General TTA specs, from GM Here

I think it would be fun to blind side them by referring them to the web pages where the TTA holds the Salt Flat world speed record for production cars

TTA PERFORMANCE ON SALT

TTA at Bonneville
TTA holds world record for Fastest Production Car

My two cents

P.S. Does Pontiac Historical Services have anything to help?

 

[Captain Mark]

Thanks Lee.

Our factory pistons are hypereutectic, right?

Anyone have factory cam specs, and head flow numbers?

 

[89ICBM]

Originally posted by Captain Mark
OK all you smart guys. (I was gonna say smart a$$es, but that would be rude)

Anyhow, I am going on this photo shoot thing, and they are gonna make me fill out a huge tech sheet about the car. A lot of engine questions. Now my motor is stock with external bolt-ons. What info can you guys give me about:

TTA factory:
Pistons
cam
crank
rocker arms
comp ratio
stock head flow numbers

I think I know most of this stuff, but I want to verify so I don't screw up my part of the article.

Hi Mark,

This is what I have on the cam: 258/262° advertised duration, 192/196° dur @ .050", 107° LSA, and .409/.434" lift w/1.65 rockers.
Pistons are hyperuetectic with a steal skirt and a 30.4 cc dish.
Crank is 2 bolt main bearing cast steal and cross drilled for better oiling.
Rocker arms are actually 1.67 stamped steal but you can use either ratio I show here, not much difference.
Compression ratio is 8 to 1.
You got me on what the stock heads flow but it was better #'s than the GN heads.

 

[Captain Mark]

That's what I needed! Thanks brother.