I Just got a killer deal on 4.10 ls1 rear and just wondering how it will do? Pro's and con's.

 

Pros is that it'll probably be faster.
Cons is that it'll probably be slower in the 1/4 than it would be with 3.73s and get worse mileage.

 

Pros - quicker acceleration

Cons - poor gas milage, weaker and more prone to breakage than other ratios, you'll spin worse off the line and at low speeds.

My TBSS has 4.10s stock. Even w/ the large 20" wheels and tires that come stock IMO the RPM are too high @ highway speeds. It is fun accelerating though.

 

Do you think I will be able to get some traction with 26'' x 10.5'' x 16'' LT
MT drag radials? How about on nitrous? And will it be bad if I Finish the quarter mile in OD?

 

You should get decent traction. MT drags are good, I've heard. You won't be spraying on your launch so that should change. And yes, it'd be very bad to finish the 1/4 mile in OD. Which is why for a track car 4.10s are a bad idea.

 

Sell that rear for the same amount it would cost to get 3.73s in your current rear.

 

Why wont I be spraying out of the hole? And could I get a bigger cam and wind it out in 3rd?

 

Cause you aren't supposed to spray in the lower RPMs. And no. If you could more people would talk about 4.10s being optimum instead of 3.73s. More power only means that you'll get there quicker, and therefore shift earlier.. not later.

 

I can damn near spary out of thw hole now with the 273's with the 3000 stall I can spray about 10" out. I wish I had 373's but life delt me 410's So i guess I'll just have a fun street car.

 

It's not that you can't spray out of the hole, it's that you shouldn't.

 

The only thing that you've said that makes any sense is to NOT shift to OD in the 1/4.
People don't spray out of the hole because of traction or low rpms. With traction and a loose converter there's no reason not to spray the launch.
He could change the cam AND related valve train components to increase the engine operating rpms and here's the biggie just change to a taller tire for the track sessions. My car has 275-60x15 Hoosier drag radials and 4.10s on it and goes the numbers in the sig going thru the traps at about 6400 rpm.

 

Thats what I have been hearing, I will turn around 6300 in third N/A and 6400 on nitrous.

 

Yes, I know. He never said raise the shift point. He said add a cam. And I know low RPMs is why you aren't supposed to launch with nitrous, perhaps if you read my post you'd see that I said this already. Everything has made sense.

 

Anyway I got the 4.10's and I'm running them! What would be a good cam for my setup? Car in sig but replace 273's with 4.10's and mickey thompson et streets

 

I agree with everything except the problem of shifting into overdrive in the 1/4. If you have a tranny built for it, it's not a problem. But od is real tall, and there's a pretty lage gap between 3rd and 4th. If you don't have the power to pull it, you may not see any gains. I'm set up with 4.10's and a A4 and cross the line in od every time. But I don't gain much in od n/a, but on the bottle it's a different story.

3500 stall! problem solved.



All in all I'd prefer a gear a little taller like a 3.73 or 3.90. But with my car I'm stuck with the 4.10's until I swap a different axel in. If your geting the gears at a deal or free, go for it.