A Q's about my 08 LTZ
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A Q's about my 08 LTZ - 5/8/2008 12:10:08 PM
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Smooth08LTZ
Posts: 13
Joined: 5/8/2008
Status: offline
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It's been 18 years sense my last "BIG BOY" truck. Think Dakota, Colorado, S10..... Well I love it so far but have a few Q's. It has the VortexMAX 6.0 and I was wondering why the hell it will not smoke the tires from a stand still (with tracktion control off)? Not that I want to all the time , it's just sometimes ya want the big dog to eat. What size motor is the 6.0 in inches....350ci? I forgot my middle school math and it hurts to try. Also, just wondering if anyone has had any problems with there 08 crew w/6.0?
2008 Silverado 1500 Crew Cab Short Box LTZ 4X4 Summit White
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RE: A Q's about my 08 LTZ - 5/8/2008 1:18:01 PM
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bad2006z71
Posts: 83
Joined: 2/8/2008
Status: offline
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according to my little converter thing 6.0ltr is 366 cubic inches. as for not being able to roast the tires, i know the old body style 99-07 chevy's have a tourqe management system which basically depowers the truck in order to prevent spinning tires or doing burnouts. basically chevy cant stop producing the weak 4l60e transmission (basically an updated version of the old weak 700r4) so they put that in to prevent excessive wear on the drivetrain.
the only way to get rid of it is to use the predator tuner or get a custom tune. i know my truck has a really bad delay when you hit it WOT before it will pick up and go.
i dont know if the new body style trucks are the same or not. i thought that the Vortec max package gave you a super duty transmission. not sure though.
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2006 Chevrolet Silverado Ext. Cab Z71, Silver, K&N 63 series intake, 40 series single in dual out Flowmaster, Nelson 87 octane tune, Line-x spray in bed liner. one day maybe 3.73 or 4.10 gears.
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RE: A Q's about my 08 LTZ - 5/8/2008 5:44:52 PM
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tahoe07
Posts: 1139
Joined: 9/22/2006
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The problem is the programming. This is an excerpt from an Edmund's report explaining why the dyno numbers seemed off on the 6.0 they tested
Might be the same for the 5.3
As it turns out, the explanation boils down to an engine calibration strategy. GM calibrated the 367-hp 6.0-liter V8 to remain in stoichiometric "closed-loop" fuel delivery mode for 4 seconds after the throttle is floored. This fueling strategy helps keep emissions in check (and saves fuel) at the expense of reduced power — about 40 hp less at the peak. Once the driver lifts his right foot from the wide-open throttle position, the 4-second clock resets.
This explains why the Silverado's power is low everywhere on the graph right up to the jump in power right before redline. Corresponding to the expiration of the 4-second window, the jump in power is indicative of the engine switching to open-loop "power enrichment" mode. It is only when operating in this mode that the engine delivers its full rated power.
Release the hounds
On the road, the Silverado's full advertised power will be on tap during extended full-throttle conditions such as towing, or any other situation in which the throttle is floored for more than 4 seconds.
Be aware, however, that the Silverado's horsepower herd will be thinned out during all but the most prolonged wide-open throttle squirts around town. And with an empty bed and no trailer, 4 seconds is a fairly long time to have the throttle matted.
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