CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

2003 silverado z71 soon to be build thread..

The 02 simulators plug in place of your rear 02's, and feed a "perfect" signal to the computer at all times. Then you can run w/o cats, etc.

Torque management is why when you floor it from a stop your truck bogs and the computer reduces the amount of power the engine can produce- I think through timing retard mostly, possibly from fuel too. I'm not sure what programmers allow you to adjust it. I would suggest NOT turning it all the way off, the Diablo (not sure about others) allows you to adjust it from stock to totally off, and in-between. When I bought my truck the dealer told me point blank, if you turn it off you WILL destroy the rear end. From my previous 10B experience, I believe them. I've also read that turning it completely off can cause harsh shifting and possible tranny damage. Also, my truck (2wd) would be borderline undrivable in poor road conditions with it off, IMO.

On dry pavement, if I bury the go pedal from a stop, my motor sounds strong, but as soon as the tires begin to spin it bogs until I get moving. If I floor it at speed, it just goes. If I get the tires wet (pulling out of the carwash, for example) or get really sideways I can spin them until I let off, easy.

That, and the crappy shift/ downshift points on the 4L60e really limit the amount of available power under certain conditions. The programmer fixes those issues, and gives you about 20HP on low octane and 30+ on premium.

I'm not sure what programmers offer what, but from my research the Diablo seems to provide the most features, including the ability to custom program the fuel and spark tables +/- 20% or so. Many of the aftermarket companies I looked at use it and can do custom programming using the unit if you add a blower, cam, dyno tune, etc.

The second best reason for a programmer is the 1-3MPG improvement most people claim to see after they install one.

As far as headers go, the Y-pipe is restrictive, so I'd want that changed too. I think Dynatech is the company I saw that had full length's available for our trucks, w/ cats, but they are pricey. I think they claim 40+ HP though. There may be others out there too.

Exhaust wise, I've been really happy with Flowmaster on my older trucks, I ran an American Thunder dual outlet cat back on my 93 and it sounded great. They aren't stainless, though, if that matters to you.
 
what year did they start putting torque management on the newer trucks
 
bowtiepower00 said:
The 02 simulators plug in place of your rear 02's, and feed a "perfect" signal to the computer at all times. Then you can run w/o cats, etc. got a website abt this, id like to check it out!

Torque management is why when you floor it from a stop your truck bogs and the computer reduces the amount of power the engine can produce- I think through timing retard mostly, possibly from fuel too. I'm not sure what programmers allow you to adjust it. I would suggest NOT turning it all the way off, the Diablo (not sure about others) allows you to adjust it from stock to totally off, and in-between. When I bought my truck the dealer told me point blank, if you turn it off you WILL destroy the rear end. From my previous 10B experience, I believe them. I've also read that turning it completely off can cause harsh shifting and possible tranny damage. Also, my truck (2wd) would be borderline undrivable in poor road conditions with it off, IMO. got a website for diablo programmer?? i wouldnt turn it off,just want more power off the line. and better towing.


That, and the crappy shift/ downshift points on the 4L60e really limit the amount of available power under certain conditions. The programmer fixes those issues, and gives you about 20HP on low octane and 30+ on premium. yep my truck got crappy shifts sometimes. once in a blue moon, beautiful, most of the time like alot of same truck, crappy shift.


The second best reason for a programmer is the 1-3MPG improvement most people claim to see after they install one. the 1 to 3 mpg is better than nothing, my truck just turned 92 k miles last night.
 
I think all of the gen III trucks have torque management.

Caspers is the company that makes the 02 sims, but I read a post on TDR last night that the feds won a lawsuit against them and the company is being forced to pay fines, etc, for marketing and selling the units. http://www.usdoj.gov/opa/pr/2007/July/07_enrd_490.html Thanks, greenies... :rolleyes: Due to that, not sure if they'll still be available.

The long tubes I referred to earlier come with a high-flow y-pipe with integral cats. My factory Y-pipe chokes down for ground clearance under the trans, so I know that's a bottleneck, but I don't want to spend the money on the full lengths. I guess I'll wait until my cats get clogged.

http://www.diablosport.com/index.php?module=htmlpages&func=display&pid=3 I've found them through mail-order for as low as $330, though most of the time they run $399ish.

Not sure what kind of mileage you're getting, I get 15-ish city in D if I'm heavy on the throttle, just under 20 hwy. I usually average 17-18 overall, but my truck never sees less than 1/2 throttle, and I don't let anyone beat me away from a stop. :D This is stock, 5.3/4L60e/3.23's. I did pick up one MPG by switching to Mobil 1- which still looks like new after 7K.
 
well i got Definity Dakota A/T tires. 265 75 16. they are pretty good tires. better than my last ones. there wont be anymore build thread for this truck since i like the 07 better, they ride better, and coil springs are better than torsion bars. plus my truck has 100 k miles, and isnt running 100 percent, but runs strong. same time oct next year ill be tryin to get a 07 chevy truck. this time ill try to get a crew cab, first gotta pay more for this 03 and get a 07 at lower payment i got approved at 501 a month. i want it lower so am waitin til next year and see if they have any left overs left. so im keepin this 03 stock.
 
Top Bottom