One of my friends just bought an extended cab Z-71 with the aluminum 310 hp 5.3. What kind of times have you guys seen stock out of these trucks. It doesn't feel nearly as strong as my LBZ duramax stock. Maybe we will have to race to find out. It only has 29k miles on it and it pinged just a hair when getting on it. Do you think Seafoaming it would help any?

 

i dont think that seafoaming it could ever hurt, but that sounds more like an exhaust leak. it seems unlikely since the truck is so new but anything is possible.

 

Stock? ~16 seconds. It is stil only a little 5.3...

 

Mom's got the same engine in her 05 and it does ping when using cheap gas.

 

When I had mine, the best time it ever ran was a 15.7 @ 88MPH, But this was at 4,000ft and about 85 degs. I had a tune, cai, and Aerochamber. But this was done in 4Lo

Truck
2005 ECSB Z71 L33 3.42's on 33x12.50x17's.

 

A buddy of mine ran 15.8 in his RCSB with exhaust.

 

I don't have any track times but I did put mine on a dynojet and had 268 hp and 313tq with just a catback, intake and crappy superchips tune.

 

with lts, tune and intake with 3.42s i ran a 15.4 at 90 in 85+ degree weather and could have ran alot better.

 

I dont have a 5.3 L33 310hp but I have a 04 5.3 iron block 295hp ECSB and ran 15.500 @ 86 spinning on a 2.59 60' bone stock, stock tune, and the paper filter.

 

I ran 14.6 at 94. that was my 222/224/112 with a cai, and catback. On 373s and a Zippy tune, stock tires. 75-80 degrees