Ok i will have a STS kit with 6psi along with a built tranny and 3k stall.
Should i go with the 4.10s i have sittin on my back seat, or stick with the 3.42s that i already have?? I have a Eaton LSD that im goin to put in to replace the Grenade-80.

Oppinions please!!!!

 

i would go with the 4.10's because you are going to need as much low end as you can get with the turbo!

 

even with the 3000 stall?

 

I've wanted to ask this same question. Im running 4.56's and a 3k stall and I'm worried that it's too much gear too. ttt

 

I'm no expert, but I think you will be better off with the 3.42 gear vs the 4.10. Turbos supposedly love gear. Something to with loading the engine/turbo. You will not build boost without putting a load on the engine. Hopefully someone with more knowledge will come here and elaborate.

 

I have heard that they like higher ratios b/c it helps create a load that increases the exaust that turns the turbo faster. Deeper ratios put less load on the motor (why your around town milage goes up with the 4:11's) so there is less exaust gas to build boost.

 

I have 3.42s a 4l80e and a 2800 stall. This is with street tires.
http://www.incontt.net/videos/Quicksilverado12-47.wmv
This is with slicks and a 2-step.
http://www.incontt.net/videos/QuicksilveradoMMP.wmv
And from a roll. 8 psi on a stock 5.3
http://www.incontt.net/videos/quicksilverado-roll.wmv
4.10s will not allow the turbo to build boost until you are well past 1st gear.

 

So thats why you told me to keep the 3.42s...
Im goin to take your word on that.. i guess im goin to sell the 4.10s then..
that away i can keep my nice low rpm interstate speeds.

 

anyone else got an opinion?

 

3.42...4.10 will kill spool up and make your converter tighter.

Quicksilverado...looking at those vidz, I can tell your camera man is a trained professional!! We gotta make some more SOON!!