It's official :-)

[Glenn Hayes]

Originally Posted by brent flynn

He is running a 455, though... I have 4.10s in it now, with 455, and it runs 10.80s/122 at 5800 rpms... I will need 4.33 gears atleast...i have 4.33/4.56/4.88 for it.. 4.88s might be a little steep, for my needs, but, i have them, if i dont hit about 6500-6600 with the 4.56s. On the other hand, a friend of mine, with Buick 350 stocker, only running 4.33's i think...4.56s didnt pick it up, but that could have something to do with the intake manifold, on those engines...not as good as a factory Pontiac, In my opinion...I definitely wont rule out less gear, though...

I ran a L/SA Buick Skylark 350 back in the late '70's with a 4.10 gear.

[brent flynn]

I may be underestimating my engine, and have thought about trying the 4.10s before i change them to 4.56... I just dont think they will get the car 60fts quick enough... Guys in my class are goin 1.39-1.42, depending on weather... Of course, the engine has to make it to the 1000ft mark, before nosing over...hehe

A 4.10 is going to be pretty light for a 3500 pound car with a Dport 400. Maybe a 4.33 with a short radial might be ok. If you run your Bias tires start with the 56's.

[brent flynn]

Yeah, i pretty much gonna start with bias plys, so i figured the 56s would be the best way to go... Doubt that i will have radials in April... luckily i have ratios to choose from... i figure this engine will need to see around 6500 at traps, to get any kind of ET out of it...

[Dave Ribeiro]

Brent,

I have to agree with Todd , you don't want to leave anything on the table.

[69Cobra]

First off, Congrats on making it official! I also made it official last year when I got my number its a pretty cool thing to make a dream come true. I'm hoping to be out sometime this year as well.

I'm just curious (as I know nothing about Pontiac's) with you guys talking gear ratio's and all with a 3.75 stroke engine and hoping for a 6500 trap RPM's that just sounds kind of low to me. I'm guessing there is a big restriction on the induction side to not let it RPM any more than that?

[brent flynn]

Originally Posted by 69Cobra

First off, Congrats on making it official! I also made it official last year when I got my number its a pretty cool thing to make a dream come true. I'm hoping to be out sometime this year as well.

I'm just curious (as I know nothing about Pontiac's) with you guys talking gear ratio's and all with a 3.75 stroke engine and hoping for a 6500 trap RPM's that just sounds kind of low to me. I'm guessing there is a big restriction on the induction side to not let it RPM any more than that?

Thanks Kris! The big restriction is on my wallet...hehe... I'd say that the engine will only do what the cam/springs/valvetrain will allow. Im starting off pretty conservative, and i doubt my stuff will want to go any higher... My deal will probably like 6000-6200 shifts(maybe) and string it out a little higher, through the traps. Pontiacs arent usally real high winders, like a 350 chev would be...parts are somewhat heavier, too. Pontiac heads seem to fall off earlier than a sbc, but you can fool it , with enough duration , valvespring pressure, and plenty of gear and converter. But, it doesnt always work...hehe

[brent flynn]

Originally Posted by Dave Ribeiro

Brent,

I have to agree with Todd , you don't want to leave anything on the table.

Im sure I'll be leaving plenty on the table, for awhile...hehe
Main concern, is gettin this thing to 60ft best i can, without being completely out of breath at 1000ft...alot different than now... i 60ft pretty good, and still pulling at 1320ft...under 6k, no less...

[Mark Yacavone]

I would say definitely 4.56's if you run it in F...as long as your lifters and springs are up for it.

Do you have a low gear set in the trans now?

[brent flynn]

Originally Posted by Mark Yacavone

I would say definitely 4.56's if you run it in F...as long as your lifters and springs are up for it.

Do you have a low gear set in the trans now?

Mark, i will be running a 2.75 low Hipster 400( i know , i know , hehe) to get me goin , for awhile, my current transmission is standard low gear... and i have 2 Ati 8'' converters, one of which will be restalled, as they are flashing about 4200, behind 455 engine. That is with 4.10 gears. I have to put the car on a little diet to get it down to 'E' weight...with me , the car is about 80lbs over(3540-3550 on starting line), im about 60 of it. Got to get it down to 3470.
Ive considered running F, all i have to do is add about 80lbs in a weight box.
Im not running shubecks or smith machine lifters, at this time. Im running the Lunati lifter, and Comp Springs, about 140 on the seat. I will see what i have, and down the road, when i change cams, i may have a set of Shermans done up...little leary of the ceramic bottom lifters...It woudnt hurt my feelings if they outlawed them...