I've read many of the posts on here regarding this topic but keep coming up with tuning info or gear selection info in relation to top speed. All I want to know is what would an A4 ls1 car with 323s run on the top end? I'm never going to do it but would like to know.

 

ive been up to 155 - 160 and had a little more. got a little to 'floaty' for my taste so i brought it back down.

ill try it again when i lower

 

Oh ok. So you are A4 with 323s?

 

Stock it's governed at 162 mph
Theoretically, if with stock gearing (3.23) and a 6200 shift point, if you ran to the top of 4th (overdrive) you could hit 200mph. Factor in aerodynamics and power, etc.. you would never hit that at near stock power levels.

You can hit 145 at the top of 3rd, but I wouldn't know

Here's your math, figure it out.
https://ls1tech.com/forums/attachmen...d-rpm-gear.pdf

 

ive ran 150 plus with a4 and 373 and ran out of gear but i had 150 berried for a long time still had plenty of motor left and it was a lt1

 

my 3.23 A4 LS1 at the top of 3rd gear at 6500rpms goes 154mph just to give ya an idea

 

179 in my ws6 vs my uncles c6 vette he was at 180 before he started pulling me my car mods at the time ls6 cam, heads, undedrive pulley hypertech ,160 temp,everything else was stock. I love top end thats why i don't have a converter.3.23 gear at time now 3.42 never been back up top.

 

Not sure if you are referring to 1/4 mile or roll racing but here are a couple 1/4 mile racers with FLT 4l60E transmissions. Links to the threads below. Vince


342rear
https://ls1tech.com/forums/automatic...151-byron.html


Ratio unknown???
https://ls1tech.com/forums/automatic...ar-flt60e.html

 

Wow interesting. I actually meant just overall top speed before speed limiter kicks in or car runs out of steam. Will stock ls1 cars hit their speed limiter if equipped with the stock 4l60e and 323s out back?

 

I cant say this with certainty since i have never driven a stock LSX car fast enough to find out lol but i would say since the limiter is there yes otherwise GM would not have needed to put it there.

 

Yes....eventually.

 

I dont know for sure, but I know that my 3rd gear runs out at 140 ish mph

 

Hmm, I wonder how fast a 2.73 car will run with no governor. I've taken it up to 130 in third and it was straight chillin', not even close to redline.

 

Here's a google doc calculator for you to play with.

The only things that should be changed are the things in yellow. Though It's currently set up for my A4 with 3.23 gears.

http://spreadsheets.google.com/ccc?k...DthL-x0vqCfiRQ

 

Well a corvette (C5) with A4 will top out around 170 in overdive with a 3.15 gear and 26.7" tire diameter. The vette runs out of steam.


In the right configuration, you might get up to around 215 - 225 mph, but you'll need a lot more power than the stock motor can provide.

 

A buddy of mine hit 200mph in a H/C 98' Vette...with a A4 and stock rear gear..3.15 I believe.

 

if you put in a stall, it'll be a bit lower, but if you could hit 6000rpm with your 3.23 rear you should be going about 203mph (without any slippage).