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Need a little more juice

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Need a little more juice
OK, here's the senario. I've got a 2001 Chevy Silverado Extended cab 4 door. It's got the 5.3 liter 323 cu V8 motor, 2WD. It pulls my boat fine, but it keeps kicking into passing gear on an incline. Your first question is, "Are you cutting the over drive off?" The answer is yes. I never pull a load with over drive on.

Now, with that said, the only thing I feel like I can do is squeeze a little more horsepower out of the motor through out the power band. My first thought was a Jet or superchip's power programer or module. But, with a 250+ dollar price tag, that's a little steep. Not to mention i'd have to bump up to 89 octane or better to get optimal performance. I know I built a 2WD I owned a few years ago, and I didn't really notice much difference until I added the after market air intake and modified exaust. Of course, when I upgraded to a stage two, those mod's were neccesary anyhow to include a 180 degree thermistat.

Anyhoo, the moral of the story is i'm trying to squeeze about 20 more ponies at the rear wheels with out doing anything that requires me to break my bank account, or have to upgrade multiple parts and run high octane gas. Any thoughts?



Bryan Draper

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http://www.catchemcreekoutfitters.com


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Re: [Tarpon4me] Need a little more juice In reply to
What about gears? i think that you truck has either 3.23's or 3.73, probably the 3.23. what about bumping it to a 4.10. Your mileage will suffer around town, but it will tow worlds better




DO NOT CLICK
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Re: [fish4fish] Need a little more juice In reply to
I thought about that, but fweeeeeeeeeeeee, the old 'rado doesn't need any worse mileage. LOL I can hardly afford to drive it now as it is. Tongue With that said, I never checked the gear ratio. I know a couple of the trucks I owned in the past had a 3.53 gear, and i'm thinking that might be exactly what is in this one the way it tugs.

It's looking more and more like i'm going to have to spend more money than I wanted. I figure i'll start with a cold air intake (since I need the power at higher speeds anyhow) and maybe a cat back exaust to see if that does it. It probably won't give me but about 10 HP at the rear wheels (if that), but it might be just enough to keep the overdrive from kicking in. I wish I could afford a performance ignition system, but with seperate coil packs for each cylinder, i'm looking at close to 1000 dollars for the kit. Unimpressed



Bryan Draper

Your Saltwater and South Carolina Moderator




http://www.catchemcreekoutfitters.com


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Re: [Tarpon4me] Need a little more juice In reply to
Start with the little stuff first.. Cold air induction and a new exhaust will do wonders for your powerband.. But it really sounds like you need better gearing.. Your top gear may be slightly too tall and that is causing the kickdown on the inclines..

I have an F350 Dually (diesel) that I added a cold air intake, Bigger exhaust, and a superchips programmer to.. On tow mode I get 2 more MPG than stock with a tone more power and just a few mph off the very top end.. Not like I drive 90+ mph very often in it anyway..

It's getting a hard bed cover next week, and probably a second turbo this fall.. I can't help it, I'm a gear head..


Steve
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Re: [Feydakin] Need a little more juice In reply to
LOL, I know what you mean Steve. I use to be a "gear head" as well, but I try to leave well enough alone if I can help it now a days. I've had big 4X4's and fast 2WD's, and I did all the work myself. But now, i'm into quiet and efficient. I had thought about gearing before, but that would be a last resort. I think the intake and exaust might just give me enough HP at a lower RPM to keep the truck from shifting in and out. Once I save a bit of money up, we'll find out. Thanks for your inputs Feydakin........... Cool



Bryan Draper

Your Saltwater and South Carolina Moderator




http://www.catchemcreekoutfitters.com


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Re: [Tarpon4me] Need a little more juice In reply to
What about a throttle body spacer? With the above combo also of coarse.
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Re: [Tarpon4me] Need a little more juice In reply to
my 96 dodge dakota dose the exact same thing when pulling my small row boat traler and my small quad traler.

it will also do it towing nothing at all if the hill I am going up is stepe enough...

I dont know if it is a pony thing or it is in the over drive mech it self, I am no auto machanic so havent a clue.


If the Lord's willing, You'll be Blessed.
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Re: [Tarpon4me] Need a little more juice In reply to
This is really OLD!!!!!!!!!!! But, I figured I would update and let everyone know what I ended up doing.


First of all, at the time of this email, I already had a K&N filter installed. I left the stock air intake, and for good reason. The run of mill cold air intake with an exposed cone filter under the hood, is doing nothing but sucking up hot air from the engine compartment. The stock air box is better in regards to flowing cooler air, and with a K&N or other performance air filter, it's just plain better all the way around. The exception would have been the Volant (not sure about spelling) air intake system w/ ram air tube. It's a sealed unit, protecting it from the engine compartments super hot air temps. At the same time, a ram air tube is availible for them, which grabs air from outside the truck in a real deal ram air system.

The first real mod I did was the addition of a Powerbond 25% underdrive pulley from Scoggin Dickey. It was a pill to install, but thanks to the guys at www.performancetrucks.net, I was able to get it done. You could probably surf around the site and see my rants when things didn't quite go my way. Wink It was a tough job if you hadn't done one before. Now that i've done the job, i'm pretty decent at it. Bottom line, it made a difference, but nothing huge. By itself, I didn't expect anything drastic anyhow.

Next, I went with a Diablo Predator performance tuner. The reason I selected this specific tuner is because of all the diagnostic software out there, it has the most user capabilities, and it has the ability to provide a custom tune through a vendor. It worked out great. I ended up with a custom tune from RPMonline.com, but i'll get into that later on. To start, I ran the caned 93 octane tune with what I had.

On to the bear. I decided to go with Pacesetter long tube headers, and a Pacesetter off road Y pipe. The off road Y deletes the cats, and creates incredible exhaust flow. I can get away with this in my state, only because they do not inspect vehicles. While I was changing out the headers, I went with NGK TR55 plugs and swapped out the stockers with MSD spiral core wires. The MSD wires have a flexible end piece that I required to clear the headers once they were installed. Otherwise, the wires would have been laying on the headers, which would have been bad. Once the exhaust was installed, I had a Dynomax super turbo muffler installed, and left the single pipe out the back corner. A common misconception is that true dual with this type of set up produces more power. Talk to a few people at a place that Dyno's cars, and I think you'll find that to be a wife's tale. The usual scenario for true dual requires an X pipe to be installed, and usually a different size pipe, and lots of testing. For my application, it was recommended by more than one shop to leave the stock rear exhaust assembly, and i'm glad I did. The Dynomax muffler eliminated all the Drone in the cab of the truck, which was aweful before hand. The truck has a nice deep rumble, and it won't give you a head ache, even at full throttle.

With the application of the off road Y, and considering the level of modifications I had completed, I required a custom tune to balance out the truck. The off road Y pipe eliminated the down stream O2 sensors, which required the tune to dictate that to the computer. In addition, the extra air getting in and out creates a lean situation with the motor, which was adjusted with the custom tune.

Two things that shouldn't ever be done, and i've found to be factual are:

never use an aftermarket mass air flow sensor. They trick your computer and throw everything out of wack. And even though there are a couple Performance Programmer companies that claim their product works with "performance" mass air flow sensors, it's bull.

Second, if you have a need to change the fuel settings on your vehicle because of mods, DO NOT do this by changing the injector slope on the programmer. Will this work? Yes. But that also tricks the computer and could cause issues. The proper way to adjust for lean and rich conditions is by going to a vendor and having a custom tune created.

The end result was that the truck is definately producing more power, and has a very crisp throttle response. I think the outcome is satisfactory. Bad news is, I might have to get rid of my truck and get something better on gas. But, we'll see how it goes. Cool



Bryan Draper

Your Saltwater and South Carolina Moderator




http://www.catchemcreekoutfitters.com