Acceleration

[BAM1991]

has anyone ever tried the 0-60 acceleration of the tb

[sallen]

nope, never even floored the acc pedal yet

shay

[ENVOY2LOW43]

i did it on my envoy three times while i was exiting the toll booth at I-294... :D .... a friend was looking at the speedo and holding a stopwatch (what a crude way)...unfortunately i lost the paper where we recorded it.. :o ....

[MoJoe]

With the 3.42's I would not even consider timing it :cry: :D

[Dave]

Around 8 seconds for 0-60 for a 2003 EXT V-8 4X4. I bought my CTS V for the spirited accel times. 0-60 somewhere under 5.

Trailblazer does great for its weight (4700 lbs).

[MoJoe]

Around 8 seconds for 0-60 for a 2003 EXT V-8 4X4. I bought my CTS V for the spirited accel times. 0-60 somewhere under 5.

Trailblazer does great for its weight (4700 lbs).


V8 OWNER :cry: :cry: I wish I had a V8. I loved my 5.7's and 5.3's :undecided

[BAM1991]

Thnx for da replies. Anyone knowz the 0-60 acceleration for a 4.2 2wheel drive trailblazer lt

[Jman423]

V8 OWNER :cry: :cry: I wish I had a V8. I loved my 5.7's and 5.3's :undecided
I thought I heard that there isn't much performance difference between the 4.2 and the 5.3 in the TB..... Is that true?

[Manbir Sandhu]

But isnt I6 smoother then the v8? I did test drive both v8 and I6, and i felt that the I6 was much smoother then the v8, cuz there wasnt a huge different in the price so i took the I6. The only thing i cant understand is why they made it 4 speed auto :confused: Should be atlease 5 speed auto :rolleyes: Does the new envoy come with 5 speed? Cuz most suvs now days are comming out with 5 speed auto

Edit:
Umm i think i made my post off topic, so u could ingore it if u wish :o

[02EnvoySLE Guy]

I thought I heard that there isn't much performance difference between the 4.2 and the 5.3 in the TB..... Is that true?

That's like comparing apples to oranges though. If you look at the difference between a 4.2 in an SWB vs. a 5.3 in an EXT/XL, you will see minimal difference. However comparing 4.2 in an EXT/XL and a 5.3 in that same truck, big difference. Same can be said for comparing a regular 4.2 SWB Envoy and an SWB Envoy Denali with the 5.3 non-DOD. There is DEFINITELY a difference there from a behind-the-wheel standpoint. :m2:

[MoJoe]

I thought I heard that there isn't much performance difference between the 4.2 and the 5.3 in the TB..... Is that true?

My 5.3 in the 3 Silvy's, and the one Tahoe I had which where all 4wd had a much lower TQ curve. Better take offs, and nicer mid range. But I like the smoothness of the I6. Wish I coulds have both :cry:

[Dave]

I test drove a I6 and V8 2003 EXT 4X4 side by side. After I drove the V-8 there was no going back. We are only talking about 15 hp but over 50 ft/lbs of torque. I think the EXT weighs around 200-300 pounds more since it is actually over a foot of additional car.

I6 would naturally be smoother due to physics, but V-8s are pretty smooth themselves. With Displacement on Demand now available they are also just as efficient as a 6 cylinder.

But when you are trying to get over 2 tons rolling or towing something, the V-8's torque can not be matched by the I6.

I would guess the Envoy Denali would reach 0-60 in around 7.5 seconds.

[MoJoe]

The only dis-like I had about my 5.3's was the darn piston slap. When you start it up after sitting it would knock like crazy for a little bit, then go away. GM swears that is normal. All but one of mine had the problem. The 4.8's and 6.0's do it also.

[Jman423]

Oh, alright, I really wasn't thinking about towing, so your right, I see!! :cool:

I had driven a TB SWB V-8 while I was looking to buy a TB, and I really wasn't impressed with the power at all.

I used to drive (work trucks) a Chevy (Cheyenne) 1500 and a Tahoe, and when you stepped on those pedals, HOLY SH*T!!

So thats why I asked that question. Thanks for clearing that up... :)

[SATBLS]

I love the naturally smooth quality of the inline 6. I drove cars with V-6 and V-8 engines for years. One of the things that I LOVE about the I6 in my BMW is its silky smoothness, flat torque curve, and eagerness to rev. When I learned that the TB had a straight 6 also I was DELIGHTED! When I test drove it and experienced it for myself I was truly amazed at how refined the engine felt for a) a dometic vehicle, and b) for a truck!! Not to say that I don't love raw V-8 power, but since I don't really tow much or drag race these days, I prefer subtle and ample to roaring and ferocious for daily driving. :)

[Envoy Fan]

The only dis-like I had about my 5.3's was the darn piston slap. When you start it up after sitting it would knock like crazy for a little bit, then go away. GM swears that is normal. All but one of mine had the problem. The 4.8's and 6.0's do it also.

The '02 and early '03 4.2L I-6's also have the piston slap. Some are worse than others.

[Envoy Fan]

I had driven a TB SWB V-8 while I was looking to buy a TB, and I really wasn't impressed with the power at all.




:eek: A prototype?

[02EnvoySLE Guy]

:eek: A prototype?

Yeah I caught that too.... :eek:

[Dave]

I was starting to wonder if GM came out with a SWB TB back then.

[TBlazeruss44]

How in the heck did GM allow a V-8 short wheelbase TrailBlazer to escape the plant without me giving her a good run first!!! :confused: :eek:

[Jman423]

:eek: A prototype?
Oops, your right, I meant to put EXT, and for some reason I wrote exactly opposite what I was thinking!! Sorry!! :cry:

My point was that IMO my SWB seems to out perform the V-8 that I drove. Maybe it was just the specific truck I drove.

[Envoy Fan]

My point was that IMO my SWB seems to out perform the V-8 that I drove. Maybe it was just the specific truck I drove.

May have been the difference in rear axles. The 5.3L V8 is real tight when new. :m2:

[Dave]

The EXT V-8 has too carry around a couple 100 lbs more than a SWB I6 and GM V-8s do seem tight at first. Put a V-8 in a SWB and it will outperform the I6 providing both vehicles have the same options.

I love the I6. It is one of the main selling points of the Trailblazer and its siblings. It is A LOT better than the Vortec series. But in an EXT, it couldn't match the low end power of the V-8.

[Jman423]

.......Put a V-8 in a SWB and it will outperform the I6 providing both vehicles have the same options......... But in an EXT, it couldn't match the low end power of the V-8.
See, based on common sense, thats exactly what I thought. Then I read some opinions and drove that EXT (which was used @ 25k BTW) and I wasn't impressed with the pickup. When I test drove what is now my truck, I was expecting it to be worse than V-8, but I felt more pickup. Of coarse the V-8 would be better for towing an all..... :)

[sallen]

the I6 is prolly alot smoother also with less noise, also kinda off topic does anyone have the v8 with the displacement on demand thingy i saw where it can change at crusing speed down to a 6 cylinder, i was just courious if you could tell a diff or not

shay

[MoJoe]

the I6 is prolly alot smoother also with less noise, also kinda off topic does anyone have the v8 with the displacement on demand thingy i saw where it can change at crusing speed down to a 6 cylinder, i was just courious if you could tell a diff or not

shay

My moms Caddy with Northstar and buddies Hemi you can't tell. They do the switching to less cylinders when cruising. It is pretty neat. I still like all of mine all the time, something about that I have no idea why :undecided

[Envoy Fan]

the I6 is prolly alot smoother also with less noise, also kinda off topic does anyone have the v8 with the displacement on demand thingy i saw where it can change at crusing speed down to a 6 cylinder, i was just courious if you could tell a diff or not

shay

The DOD will switch from 8 to 4 cylinders if the computer tells it to. At this time only the TB EXT's and Envoy XL's have the DOD. All will be DOD in the 360/370 line in '06.

[New to TB]

Anyone have the list of what speed each gear will take you to?

Either first gear is very long, or it's switching into second gear without me knowing, cause it seems as if I get to 45-50MPH before I feel a gear change.

I haven't found any open roads to really test it out.

[MoJoe]

Anyone have the list of what speed each gear will take you to?

Either first gear is very long, or it's switching into second gear without me knowing, cause it seems as if I get to 45-50MPH before I feel a gear change.

I haven't found any open roads to really test it out.

If you mean from wide open throttle (WOT) it will not shift into second until that. But just taking off normally it shifts to 2nd smoothly at a low RPM and MPH.

[Dave]

Anyone have the list of what speed each gear will take you to?

Either first gear is very long, or it's switching into second gear without me knowing, cause it seems as if I get to 45-50MPH before I feel a gear change.

I haven't found any open roads to really test it out.

It depends on rear end gearing a lot. 45-50mph sounds about right if you have 3.42 (most do). GM's automatic trannies are not that smooth so you would definitely notice.