I have a 85 pontiac trans am 305 ran a 14.82 at 100 mph is that good for a 305 car thats my best time yet so far

specs:
T-5 5 speed car
stock 416 heads
headers shortys
holley street performer intake
holley 650 carb
Lunati voodoo cam
3 inch exhaust

My cuzin pointed out that my 60 foot was terrible i spun threw 1st and 2nd gear feathering it and ran threw the 60 foot at 3.324 seconds i believe.

 

I thought that was a lightening bolt that went by!!!

My 305 tpi ran 15.1 w/ headers and some weight reduction. and a 2.2 60' time. Learn how to launch your car and maybe get a set of radials, you'll get that time way down.

 

Your mph is an indication of how much power your car makes. Your ET is based on how well you launch the car.

100mph is very decent, especially for a 305. Do you know how much your car weighs?

http://www.wallaceracing.com/et-hp-mph.php

You can find out how much power you're making if you know your weight. At least you can approximate. But I'd trust that approximation more than a dyno.

 

14.8 at 100mph is what the old muscle cars used to do, they'd spin 'em off the line & make it up at the big end. There was another guy that did something like 13.4 at 99mph, he had a 1.6 second 60foot.

 

Not too shabby. Now work on that launch....

 

That trap speed is excellent. With an auto, good TC, and sticky tires, it would be in the low 13's. With lots of practice with the T-5 and some good tires, I think you could go high 13's.

 

Golden bullet,
What is the rearend gear ratio, your cam part number, lift and duration at .050" figures, and factory compression ratio?
Thanks

 

stock gear idk what exactly they are its a factory 305 with bolt ons and a cam 416 heads umm cam lift duration 443./465. lift and 270/280 duration

i think i got either 3.08 gears or 3.24 idk just blew the rear end out of it lol so now looking for a rearend thinking about getting some 3.73 gears

 

Even if the 60 foot time was 2.324 (as opposed to 3.324) that's still pretty..... um...... well, let's jsut say there's significant room for improvement.

Get some traction and a good posi in it first ( if your existing posi is a worn out "one wheel peel" situation). Steeper gears just mean more wheelspin if you don't have the traction to plant that torque. They rarely help much if you are going to run street radials. On stickier tires that can take the extra torque they can make a significant difference, though.

100 MPH trap speed is 13-second territory, depending on how well you can launch it. Even on street radials with a functional posi and a mediocre 2.0 60 foot time that's mid-high 13s. Get a good 1.70-1.80 launch on DRs or slicks and it's a mid-low 13 car.

Well done on the engine combo, BTW- sounds like it's belting it out pretty good for a mildly warmed-over 305.

 

Yeah she runs Really really good i blew the rear end out of it last week just rolling in to it in 2nd gear didnt have posi either so that just means i got a reason to put another rear end in it

 

 

Also i havent ran the car since i put msd ignition on it and a holley 600cfm 650 was to much it think and she is running amazing atm Lets just say its a healthy horse with 2 broken back legs lol