Re: It's official :-)
 

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

Re: It's official :-)
 

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

Re: It's official :-)
 

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.

Re: It's official :-)
 

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...

Re: It's official :-)
 

Brent,

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

Re: It's official :-)
 

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?

Re: It's official :-)
 

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

Re: It's official :-)
 

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...:rolleyes:

Re: It's official :-)
 

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?

Re: It's official :-)
 

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:rolleyes:. 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...