Last post on Mar 04, 2008 at 11:34 AM
You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 1500, GMC Sierra 1500, Truck
#679 of 708 Why is the '07 Silverado Max so slow on the Dyno?
Jul 10, 2007 (4:21 pm)
I'm looking into buying a 2007 Silverado Max 6.0 liter, but I read an article on Edmunds describing a dyno test where the Silverado performed poorly. Mentioned something about being calibrated by the manufacturer and "closed loop" EFI timing.
Basically, the Silverado won't kick into it's mean HP until you floor the gas for 4 seconds.
Worse, a Silverado gets worse gas mileage and will get smoked off the line by a new Tundra or Titan. Terrible! The Silverado Max is a full second slower than the Tundra from 0-60 mph.
Does anyone know if there is a chip or some sort of way to max out the HP without this 4 second rule?
I'm a rookie at this posting thing, so please take it easy on me. Thanks.
#681 of 708 Re: Why is the '07 Silverado Max so slow on the Dyno? [chevyman26]
Jul 11, 2007 (6:37 am)
C-Man...........You have to ignore anything posted at edmunds about a non import !!!!!!!!!!
Sometimes too much biased opnion.
What your prob. reading is the "digs" about GMs "torque
management" programming. The uneducated call it different
things. GM uses this on the 6.0 and 8.1 to improve driveline
life (or so I read).
Check this link for full TM info:
Yes the toyoyo 5.7 is faster in the 1/4 mile than
the reg. 6.0 in their testing. The 6.0 max was not compared against the 5.7 !!!!!!!!
Check out the gas vs. diesel tests over at http://www.pickuptruck.com
The 6.0 gasser outran and out pulled the diesels in most tests !
The 07 GMT-900 6.0 6 speed auto is one awesome motor/ trans. setup compared to my 04 6.0.............
#682 of 708 Re: Why is the '07 Silverado Max so slow on the Dyno? [hotel1]
Jul 11, 2007 (11:13 am)
Thanks! So it looks like Chevy is still going with its Torque management program on the '07 VMax? They use it to save wear on the tranny and to improve emissions, correct?
Too bad it sacrifices so much acceleration. I need most of my power while accelerating with a load.
Basically, I go dirt biking in the sand dunes in SoCal. I park my truck and trailer in the sand and I need the power to tow in/out of the sand without getting stuck. Is it possible that the TM will hurt me in this situation b/c I wont be flooring it for 4 seconds? I really need the power right away before my tires sink into the sand. Please dont tell me that a Tundra would do a better job for me in this situation....It would be so disappointing. I really prefer the looks and feel of the Chevy after driving both trucks.
Also, do you know if there is a PCMforless or a programmer for the new Chevy trucks? Is there a way to remove the TM without making the shifting stiffer? Essentially, can you remove TM without affecting the feel of the tranny or anything else?
#683 of 708 Re: Why is the '07 Silverado Max so slow on the Dyno? [chevyman26]
Jul 12, 2007 (6:20 am)
Not to worry!.........The TM is at its most restrictive in the 6.0 & 8.1s. 4.8 & 5.3s aren't as hampered !
But neither will hurt your pulling power............
My 6.0 had NO problem yanking my big camper or pulling my
big Wellcraft SanTropez' 36 footer up a boat ramp and out
of the water! Observed many 4.7 Fords struggle with a 26 footer!
#684 of 708 Re: Why is the '07 Silverado Max so slow on the Dyno? [hotel1]
Jul 12, 2007 (8:52 am)
It sounds like I should be able to get a tuner that is specific to my needs, right? All i'd want to do it reduce the TM, up the rev limiter, and get rid of the top speed limiter. Is this possible without changing the feel of the shifting? I'd want it to shift smoothly though. Do you know how this works?
Also, I dont think you can get a VMax with a 6.0/6-speed tranny combo in 2007. Looks like only the Sierra Denali offers the 6.2/6-speed right now. Any idea if Chevy will offer the 6-speed tranny in the 1500 VMax in 2008? Sounds like they are missing the boat right now with the Tundra offering a 6-speed with their 5.7l...Must be coming soon, no?
Thanks for educating. Been helpful.
#685 of 708 Re: Why is the '07 Silverado Max so slow on the Dyno? [chevyman26]
Jul 29, 2007 (7:21 pm)
Head on over to www.denalitrucks.com most of the guys on there are running a Wester's tune in there trucks. The guy that does it is always posting on that site. He says you can easily get another 50 HP out of the 6.0 engines. He can turn off the torque control and really wake up these trucks alot.
#686 of 708 2007 (new) Chevy sales observation
Jul 18, 2007 (12:50 am)
#687 of 708 2007 (new) Chevy sales observation
Jul 14, 2007 (8:05 pm)
I just finished a 4,700 mi. driving trip through the west and midwest - nev., utah, wyo., mont., iowa, s. dakota, nebr., colo. - beginning and ending in calif. I make a few observations of the numbers of new silverados I saw during the trip.
There are already lots of new 2007 chevys in what I call - "work truck land". You can see them hauling hay, pulling horse trailers, etc. Quite a few looked like they they are working hard and being put away wet - in other words, getting thoroughly used. The split looked fairly even between silverados and the bigger 2500 hd models. I saw literally 100s of both models.
Interestingly, there are many fewer gmc sierras. I saw almost no almost no tundras in "work truck land". Literally, almost none, and the few I did see were mostly in the bigger cities - Denver, Salt Lake, Las Vegas, etc. (I see far more percentage of tundras in los angeles than anywhere else I've been). Almost none are on the farms and ranches. Of the few I saw, they were almost all spotlessly clean and only one was obviously working on a ranch - it had a atv in the back. The atv has replaced the horse on many farms and ranches.
I have no observation for fords & dodges, since I am unable to tell the 2007s from the earlier ones. However, there are tons of fords and dodges in "work truck land". I'd say of all the pickups I saw (all years), fords were possibly the biggest percentage and chevy a close second.
This is just an informal poll taken over 2 weeks and lots of driving, so it is not definitive, However, based on that I think toyota has its work cut out. True, a sale is a sale even in the big city, but if toyota wants to be successful in selling big pickups it must crack the nut in "work truck land", where every other vehicle on the road is a pickup truck. So far, it is poorly represented where trucks are workin' for a livin'.
#688 of 708 sales are strong here
Jul 14, 2007 (8:27 pm)
funny, about a week before i bought my NBS '07, a co-worker of mine and i had been discussing the looks of the new rado's......we both agreed it would not be a truck i'd want based on the classic look of the 99-02's...........but after one lap around the block in the '07 and i couldn't wait to sign the dotted line.......played the dealer/purchaser buyers game, hardly slept the night before the deal finally was made, but alas i own it and love the heck out of it..........it's the best Chevy i've owned yet.
the trucks are like 1 out of 10 Rado's you see on any given street here in the Central valley, and they're definately hitting all age groups.....i was at the dealer on Tuesday to get the right side mouldings replaced as they were off from front to back (the only flaw i've found), and there was what looked like a high school kid buying the work truck version, and he was so excited that you'd have to be there to appreciate his excitement.
one of our installers bought the 5.7 Tundra.......hardly anyone has even given it a glance......it's a Toyota right?
the new Rado however got it's crowd....hehe
what can i say, it's a Chevy eh?
i believe Chevy got it right for once, and has a winner.