2008 Silverado won't spin a tire

[383_Stroker]

2008 Silverado

The truck came with a 4.8L - We swapped in a 5.3L because the 4.8 as a miserable little motor.. lol

The 5.3 is substantially better. The truck, however, will absolutely, positively not spin a tire via power braking.. I'm not sure why this is an issue, it's not something we'd regularly do, but just the fact that it won't do it, makes it a huge problem.. LOL

I Want to see if i missing anything on torque management or trans settings that would keep the truck still limited.

The harness for the 4.8 didn't have the DoD/Active Fuel Management wires in it, so we just ran those this weekend and i turned that on with the stock settings. I'm up for suggestions on getting more out of that too.

Feel Free to throw out suggestions on any part of the tune, its pieced together from lots of reading on here so there's a good chance I screwed something up..

5.3 Swap
Corvette Servo
3.23 rear end

Attached:
The Current tune file
a short log of attempted powerbraking
a longer drive log

I'm starting to worry that it simply doesn't have the power to spin a tire.. :P

[383_Stroker]

well.. the 2nd log won't load.. lol..scratch that

[Japeatr]

bump for a cobalt friend

[383_Stroker]

Thanks

just avged 19.5mpg on the last tank of gas with DoD turned on.. thats exciting..

anyway... *bump*

[HawkZ28]

If I can roast 31x10.5's from a dig with an I5, you should be able to with a 5.3 .

Have you dialed in your MAF?

Adjust your PE. You have some delay in it, and your PE enable could be adjusted to get into it more easily which may help too.

[madvette08]

Set the stall TM endable/disable in the trans 8000 rpm and see if it lets you. If that dosent work add a 100 shot lol... What size tires you got on the truck.

[383_Stroker]

Thanks for the tips guys.. It's still doing basically the same thing.. Foot on brake and gas it revs up to about 2000 rpm and just sits there.. I did manage make it slowly spin the tires a time or two, but it wouldn't do it every time.

Tires are 275/55r20s

[Japeatr]

clean silverado

[383_Stroker]

Thanks!

Anybody else feeling helpful? =)

[umrjmac]

start with the back tires in a puddle?

[383_Stroker]

Alright, further testing this afternoon.

I think it is officially a lack of power problem.

I caught it in a position it didn't immediately lock the rear end and it became a 1 tire fire machine!.. Then as soon as it locked the rear end it stopped spinning and wouldn't do it again..

All the more reason to invest in the Vortech Twin Screw Kit

[Japeatr]

^^^this

[Mep_q8]

275/55/20s and a 3.23 gear ratio... you'd need a roots supercharger to spin those tires!

[383_Stroker]

Currently Saving for this.. =)..

http://www.lysholm.us/gm_truck_systems.php

[Blown]

I have two trucks with them, kills any other kit out there. Instant tire roasting capability.

[apex2112]

why spend that kinda money on a supecharger? put a 6.0l in it and itll cost less then do work, theres no replacement for displacement

[Japeatr]

he just did a motor swap and the blower will still make decent power on the 5.3

[383_Stroker]

why spend that kinda money on a supecharger? put a 6.0l in it and itll cost less then do work, theres no replacement for displacement except boost

Fixed

[Gregory]

What did you do? Did you get the supercharger? If so, what kind?
My 5.3 is a dog even after a camshaft.

[Japeatr]

Fixed

abolutely