3rd gear mph
Thread Starter
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Hmmm another way to explain this, if I keep it in D (3rd), will the car pull past 140? I've usually kept the car in OD (4th) and taken the car to 130 before I had the converter done.
TECH Addict
Joined: Nov 2001
Posts: 2,003
Likes: 0
From: Live Oak, FL - in the woods where the creatures lurk.
As long as I'm WOT, mine will stay in 3rd. If you back off the gas just enough, it will shift into OD. You will make your top end speed in 3rd anyway, not OD.
Trending Topics
Thread Starter
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
I know but for those top speed runs, if I left the shifter in 3rd, just wanted to know how far up the MPH scale it will go before wanting to shift. 145 with 3.73s, that sounds pretty good especially since the fastest I have gone with my old T/A was 140. That's about as fast as I'd go, 1/4 mile or top speed.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Addict
iTrader: (6)
Joined: Dec 2001
Posts: 2,028
Likes: 0
From: sojourning....looking for my city whose builder and maker is God.
Originally Posted by GM Muscle
Asuming the converter is very efficient, you can theoreticly do 168-170mph in 3rd.
I haven't tried it again since I took care of that. lol 
But, not sure I want to go any faster than 145 though.
TECH Apprentice
Joined: Oct 2003
Posts: 308
Likes: 0
From: Rochester, NY
Originally Posted by Lady Redhawk
With my 3.73 gears and SS4000 TC it shifted into OD at 145 mph. 
I'm confused. I have always used this calculator to determine where I would redline with certain gears/tires. According to this my 245 50 16 tires and 3.23 gears makes my car shift to OD (hit 6000 redline in third) at 142 mph which I know for a fact is accurate
When I factor in 3.73 gears it tells me that I would redline 3rd at 123 mph with all else being the same. I see you got a good heads/cam package so I assume your redlining higher then 6000 rpm's to turn 145 in third?
Roarin_8 with 2.73 gears, stock tires, stock internals and a 6000 rpm redline you would shift to OD at 168 MPH according to the calculator
Last edited by darrensls1formula; Jun 6, 2005 at 09:46 AM.
Thread Starter
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Yeah 2.73s are the highway gear. I'm not changing to 3.73s until I do my cam swap, which in turn I'll rev it a bit higher due to changing out the springs and retainers.
I posted this because I've read that it's bad on the 3-4 clutches going WOT into OD on a stock Tranny.
I'm not changing to 3.73s until I do my cam swap, which in turn I'll rev it a bit higher due to changing out the springs and retainers.I posted this because I've read that it's bad on the 3-4 clutches going WOT into OD on a stock Tranny.
Originally Posted by darrensls1formula
http://www.f-body.org/gears/
I'm confused. I have always used this calculator to determine where I would redline with certain gears/tires. According to this my 245 50 16 tires and 3.23 gears makes my car shift to OD (hit 6000 redline in third) at 142 mph which I know for a fact is accurate
When I factor in 3.73 gears it tells me that I would redline 3rd at 123 mph with all else being the same. I see you got a good heads/cam package so I assume your redlining higher then 6000 rpm's to turn 145 in third?
Roarin_8 with 2.73 gears, stock tires, stock internals and a 6000 rpm redline you would shift to OD at 168 MPH according to the calculator
I'm confused. I have always used this calculator to determine where I would redline with certain gears/tires. According to this my 245 50 16 tires and 3.23 gears makes my car shift to OD (hit 6000 redline in third) at 142 mph which I know for a fact is accurate
When I factor in 3.73 gears it tells me that I would redline 3rd at 123 mph with all else being the same. I see you got a good heads/cam package so I assume your redlining higher then 6000 rpm's to turn 145 in third?
Roarin_8 with 2.73 gears, stock tires, stock internals and a 6000 rpm redline you would shift to OD at 168 MPH according to the calculator
Roarin: Don't consider swaping gears a "must do" with your cam, I would save the money for a 12 bolt down the road. I just installed a 237/242 MS3 with the 2.73s and it's not bad at all, not nearly as bad as people say. No surging no bucking and it's just slightly sluggish out of the hole but, it is still a monster from a roll and running through the gears. It does about 110-115 in 2nd though, first tops out at about 60 mph.
