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2004 chevy trailblazer_ls
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I have a 2004 Trailblazer ls. My best 0-60 time is 8.3. I
trying to get it under 8. I've heard that if I start 3 instead of D that I will accelerate faster. What do u guys think?
 

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Premium Member
2005 chevy trailblazer_lt_ext
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3,572 Posts
I don't know about the 3rd instead of D but I do know if you get a PCM tune it will help your times.
Before my tune my times were 9.56 or so and now I can pull and 8 second run.
This is with an EXT and 32'' tires.
 

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2005 gmc envoy_sle
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I have a 2004 Trailblazer ls. My best 0-60 time is 8.3. I
trying to get it under 8. I've heard that if I start 3 instead of D that I will accelerate faster. What do u guys think?
that will work as long as you dont over rev it before kickin it up to drive.....also just try launching at around 1500-2000 rmp instead of from a dead rest.
 

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2002 chevy
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2,582 Posts
A higher stall torque converter will definately help your 60 timing.
 

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2004 chevy trailblazer_ls
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211 Posts
8.2 seconds?

Do you have Mods? if so what kind, I hit 6.1 seconds w/ my 4.2 the other day. But ya, you can always get an SS. I nosed a Civic SI w/ a turbo, manual, and a fart can. He weighs about 1500 lbs. less. He had to have been pissed. I have most all the mods, tune, cai, exhaust, throttle body spacer, Bilstein/rancho shocks, 1/4 tank of gas, HD rear springs help my launch. I usually brake torque or neutral drop @ 2500 and she gets going.
 

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2007 chevy
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79 Posts
Do you have Mods? if so what kind, I hit 6.1 seconds w/ my 4.2 the other day. But ya, you can always get an SS. I nosed a Civic SI w/ a turbo, manual, and a fart can. He weighs about 1500 lbs. less. He had to have been pissed. I have most all the mods, tune, cai, exhaust, throttle body spacer, Bilstein/rancho shocks, 1/4 tank of gas, HD rear springs help my launch. I usually brake torque or neutral drop @ 2500 and she gets going.

Wow, neutral drops @ 2500rpms... hope you have a tranny shop nearby.:hopeless
 

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2004 chevy trailblazer_ls
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211 Posts
Yes I do, only had to replace it once, @ 106k. The rebuilt one came with a 100k warranty, well worth it. Realistically, I have maybe neutral dropped a couple of times. I realize this is horrid for a transmission. Keep the RPM's low, drop it in gear, and smash the gas. It's not good for it, but once in awhile it's necessary. Side note, I encourage NO ONE to do this. If you do, be smart about it. don't hit the gas more till you fell the clunk. If you are not familiar with a manual trans vehicle, then I would urge against this.
 

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2005 gmc envoy_sle
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Wow, neutral drops @ 2500rpms... hope you have a tranny shop nearby.:hopeless
lol or a place that does driveline work in general,,,its terrible for the tranny and rearend......your better off just leaving it in gear,keep your foot on the break and give it enough gas to get the rpms up to 2000ish and launch that way,,,,,same result has the dreaded neutral drop but with less damage.:thumbsup:
 

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2006 chevy trailblazer_ss_lt
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68 Posts
with a I-6 run in 3.. I had a I-6 and ran pretty good 0-60. i didnt have time but it felt better in 3 than D.... than again a SS will do it
 

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2002 chevy trailblazer_lt
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708 Posts
I have a PCMforless tune and a drop in K&N high flow air filter with royal purple in the rearend. Dex 6 in the tranny and an exhaust leak lol but i brake torqued it to about 2200 rpms and mashed it with stop watch in hand! I managed a 6.93 on the stop watch slightly downhill. Normal times are about 7.2-7.5 without brake torquing it and that's on flat ground too! Oh mine also has 219,000 miles on it. :crazy:
 

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2006 chevy trailblazer_ss_lt
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Do you have Mods? if so what kind, I hit 6.1 seconds w/ my 4.2 the other day. But ya, you can always get an SS. I nosed a Civic SI w/ a turbo, manual, and a fart can. He weighs about 1500 lbs. less. He had to have been pissed. I have most all the mods, tune, cai, exhaust, throttle body spacer, Bilstein/rancho shocks, 1/4 tank of gas, HD rear springs help my launch. I usually brake torque or neutral drop @ 2500 and she gets going.
i have a hard time believing 6.1. thats not far off stock ss trailblazers
 

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2007 chevy trailblazer_ls
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5 Posts
better 0-60, weather permitting

I've noticed that barometric pressure makes the difference on acceleration times, and just power in general. Check your local weather. On days when the barometer is up, the difference is like night and day here in Idaho, which seems to offer extemes in atmopheric pressure levels. Some days, my I6 feels completely gutless, and on other days, wheeeeeee!!!! I completely wasted a BMW sedan in Boise a few weeks ago. That was probably a high-pressure day on the barometer. I know this also affects all of the other cars on the road on the same day, but I've noticed the TB seems to be affected by barometric pressure much more than anything else I've ever owned. This is why it would be nice if someone made a turbo for the Atlas I6 engine.
 

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2006 chevy trailblazer_ls_ext
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10 Posts
I've noticed that barometric pressure makes the difference on acceleration times, and just power in general. Check your local weather. On days when the barometer is up, the difference is like night and day here in Idaho, which seems to offer extemes in atmopheric pressure levels. Some days, my I6 feels completely gutless, and on other days, wheeeeeee!!!! I completely wasted a BMW sedan in Boise a few weeks ago. That was probably a high-pressure day on the barometer. I know this also affects all of the other cars on the road on the same day, but I've noticed the TB seems to be affected by barometric pressure much more than anything else I've ever owned. This is why it would be nice if someone made a turbo for the Atlas I6 engine.
thats interesting, because last night i ran two 0-60 runs with my 06 4.2 EXT. both were between 9 and 9.5 seconds. the intersting thing is that a couple nights before, i got 8.7. i live in south louisiana right about even with sea level. for the 8.7 run(s), it was cooler around 50 degrees or so and the air was pretty dry for south LA. for the slower run i just did it was around 75 degrees and VERY HUMID (Louisiana weather changes daily). so even at sea level, air temperature and more importantly humidity make a big difference on our straight sixes:m2:
 
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