It's official :-)

Glenn Hayes · 01-04-2014, 07:53 PM

Quote:

Originally Posted by brent flynn

Glenn, im goin right to a 4.56.. that little 3.750 stroke would be idling at the traps, with 4.10s...hehe THanks! I cant wait to get it running!

Brent,
There's a guy from Minnesota that ran/runs a Tempest in E or F /SA.... I spoke with him a few years back while I was working at the NHRA St. Louis Drags, he told me that he was running a 3.73 and it was the quickest the car had ever ran and MPH. They had started with 4.56, then 4.33, then 4.11 then 3.90 ...... a close friend of mine knows him well.
Food for thought! I'm rooting for ya!

brent flynn · 01-04-2014, 09:26 PM

Quote:

Originally Posted by Glenn Hayes

Brent,
There's a guy from Minnesota that ran/runs a Tempest in E or F /SA.... I spoke with him a few years back while I was working at the NHRA St. Louis Drags, he told me that he was running a 3.73 and it was the quickest the car had ever ran and MPH. They had started with 4.56, then 4.33, then 4.11 then 3.90 ...... a close friend of mine knows him well.
Food for thought! I'm rooting for ya!

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...

Glenn Hayes · 01-04-2014, 09:31 PM

Quote:

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 · 01-04-2014, 09:57 PM

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

01-04-2014, 10:04 PM

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 · 01-04-2014, 10:37 PM

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...

69Cobra · 01-04-2014, 11:16 PM

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?

Dave Ribeiro · 01-04-2014, 10:59 PM

Brent,

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

brent flynn · 01-05-2014, 12:33 AM

Quote:

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...

01-04-2014, 09:57 PM	#4
brent flynn Senior Member Join Date: Apr 2011 Location: Middletown, IN Posts: 593 Likes: 0 Liked 0 Times in 0 Posts	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 __________________ 1968 Bird/TRW 455/Home ported 13's, '70 Qjet,Holley Street Dominator manifold, Comp Solid FT, 10.817/122.30/1.440 Workin' on E/SA combo 3119 E/SA

01-04-2014, 10:04 PM	#5
Todd Hoven Guest Posts: n/a	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.

01-04-2014, 10:37 PM	#6
brent flynn Senior Member Join Date: Apr 2011 Location: Middletown, IN Posts: 593 Likes: 0 Liked 0 Times in 0 Posts	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... __________________ 1968 Bird/TRW 455/Home ported 13's, '70 Qjet,Holley Street Dominator manifold, Comp Solid FT, 10.817/122.30/1.440 Workin' on E/SA combo 3119 E/SA

01-04-2014, 11:16 PM	#7
69Cobra Senior Member Join Date: Aug 2007 Location: California, Ky Posts: 669 Likes: 62 Liked 2 Times in 2 Posts	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? __________________ Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032

01-04-2014, 10:59 PM	#8
Dave Ribeiro VIP Member Join Date: Sep 2002 Location: Williamsburg, Va.---USA Posts: 1,827 Likes: 1,612 Liked 56 Times in 27 Posts	Re: It's official :-) Brent, I have to agree with Todd , you don't want to leave anything on the table. __________________ Dave Ribeiro 1033 STK