This site was recommended by one of the Avalanche site boys. Anyhoo...,

'06 5.3 AV with Vortech V2 @ 8psi (Vortech sez) with a Predator high octane custom tune, K&N cold air, JBA silver ceramic shorties, B&B cat back performance exhaust, 6" suspension lift, 4.1 gears, dual rear ashtrays.

BUT...,

35"x 13.5 " mickey thompson all terrains on 20" rims that are part of but I wouldn't think all of the problem.

I get it dyno'd and figure it gotta be 350 HP at the wheels - NOT!
270HP/274 TQ at the wheels. Not liking those numbers. Can those big tires be sucking upTHAT much power? Diablo sez the tune is a bit rich but safe with good power.

I'm actually quite happy with the pick up and passing power but would like to see the numbers up a bit. Suggestions? I don't think chrome door handles will address the issue completely.

 

numbers don't mean much and yes, the big tires are costing you a bunch of power on a roller dyno, somebody proved that a while back.

Dynomometers are tools for measuring or comparing modifications made, the race track is the true measure of power.

 

moral of the story go dyno it with the stockers on it if you have em or can borrow some.

guess I should be feeling cool if my dyno numbers were on 285/55 20's on 3600 lb forged 20x8.5's

 

FYI:
http://www.ls1truck.com/forums/dynod...r-hp-dyno.html

 

Thanx guys,
DJ - you made my day. I was worried I had to troubleshoot the setup. Now I can be comfy knowing I've got 370 HP lurking around the crank for future reference.

 

2kewl, good to see you made your way here.


Danv