OK, here's some informal accelleration comparison info for my Avalanche, thanks to a couple of weekend street runs against my son and his pickup. The vehicles:
My 2003 Avalanche 1500, essentially stock with 5.3 V8 and 3.73 posi gears
. Has about 1800 miles so it's really not well broken in yet. My son's truck, a 1988 GMC Sierra 1500, straight cab 2wd pickup, 8' bed with a hard cover on it. The truck has a 5.7 V8 with GM's throttle body fuel injection, K&N air filter, 4-speed automatic, 3.08 posi gears (a real disadvantage for him - late '80s approach to improving gas mileage), and a Ravin cat-back system with dual outlets. The truck has just over 60k miles total, has been in the family since new so it's in very good condition.
The setup: early Sunday morning, not much traffic out, a couple of runs from stoplights - one from a roll at about 20mph, the other from a standing start. My son has just himself in his truck, I have myself and my wife plus my daughter and her friend.
First run, 20mph rolloff. We're approaching the light as it turns green. I nail it first and get barely a half-car jump on my son. He's into it hard also, but never gains on me. I back off as I pass 70mph in a 50 zone. A virtual dead heat, however, I've definitely got a lot more weight to move along.
Second run. Next light, a full stop. The light turns green, my son gets a jump on me. He's about 1 car length in front of me, however, we're both into it all the way and I start slowly gaining on him. We quit as I pass 60mph and an approaching turn. If we'd have gone to a quarter mile I would have probably caught him, again, a virtual dead heat but shows the power of the 5.3 given my weight disadvantage.
My son was not too happy afterwards. I think it kind of blew his image of how powerful his truck was
. Especially since it sounds so much better than the Avalanche! He wants a new rear end now. It will be interesting to see what the Av does when it gets some mechanical mods!
My 2003 Avalanche 1500, essentially stock with 5.3 V8 and 3.73 posi gears
. Has about 1800 miles so it's really not well broken in yet. My son's truck, a 1988 GMC Sierra 1500, straight cab 2wd pickup, 8' bed with a hard cover on it. The truck has a 5.7 V8 with GM's throttle body fuel injection, K&N air filter, 4-speed automatic, 3.08 posi gears (a real disadvantage for him - late '80s approach to improving gas mileage), and a Ravin cat-back system with dual outlets. The truck has just over 60k miles total, has been in the family since new so it's in very good condition.The setup: early Sunday morning, not much traffic out, a couple of runs from stoplights - one from a roll at about 20mph, the other from a standing start. My son has just himself in his truck, I have myself and my wife plus my daughter and her friend.
First run, 20mph rolloff. We're approaching the light as it turns green. I nail it first and get barely a half-car jump on my son. He's into it hard also, but never gains on me. I back off as I pass 70mph in a 50 zone. A virtual dead heat, however, I've definitely got a lot more weight to move along.
Second run. Next light, a full stop. The light turns green, my son gets a jump on me. He's about 1 car length in front of me, however, we're both into it all the way and I start slowly gaining on him. We quit as I pass 60mph and an approaching turn. If we'd have gone to a quarter mile I would have probably caught him, again, a virtual dead heat but shows the power of the 5.3 given my weight disadvantage.
My son was not too happy afterwards. I think it kind of blew his image of how powerful his truck was
. Especially since it sounds so much better than the Avalanche! He wants a new rear end now. It will be interesting to see what the Av does when it gets some mechanical mods!
