Engine Mods

[eazy_e_7]

i have a stock everything 2003 chevy silverado 2500hd. it has the 6.0L gas engine. i wanted to tune up the engine a little bit and was wondering if putting an intake, throttle body spacer, mass air flow sensor, and superchip would be worth my time for more horsepower.

[Jimmy J]

i have a stock everything 2003 chevy silverado 2500hd. it has the 6.0L gas engine.  i wanted to tune up the engine a little bit and was wondering if putting an intake, throttle body spacer, mass air flow sensor, and superchip would be worth my time for more horsepower.

 

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Ditch all the ideas above, except for maybe the intake. Spend the money on a custom tune! That's where you'll get the most bang for your buck!

[StoneyPgh]

i have a stock everything 2003 chevy silverado 2500hd. it has the 6.0L gas engine.  i wanted to tune up the engine a little bit and was wondering if putting an intake, throttle body spacer, mass air flow sensor, and superchip would be worth my time for more horsepower.

 

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Just go with a huffer!

[DSengineer]

i have a stock everything 2003 chevy silverado 2500hd. it has the 6.0L gas engine.  i wanted to tune up the engine a little bit and was wondering if putting an intake, throttle body spacer, mass air flow sensor, and superchip would be worth my time for more horsepower.

 

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Ditch all the ideas above, except for maybe the intake. Spend the money on a custom tune! That's where you'll get the most bang for your buck!

 

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I would even skip the intake. I think they are a waste of money and the underhood noise most of them produce can be downright annoying.

 

But yes, the first mod should definatley be a custom PCM tune. It will provide the biggest bang for the buck by far. I have been very happy with my Wait4Me on my 6.0 and it only cost $150. Besides that you may want to look at a fee flowing muffler.

[dewfpo]

PCM tune, best bang for the buck, bag the rest.

 

DEWFPO

[Bud]

i have a stock everything 2003 chevy silverado 2500hd. it has the 6.0L gas engine.  i wanted to tune up the engine a little bit and was wondering if putting an intake, throttle body spacer, mass air flow sensor, and superchip would be worth my time for more horsepower.

 

<{POST_SNAPBACK}>

 

 

 

 

Ditch all the ideas above, except for maybe the intake. Spend the money on a custom tune! That's where you'll get the most bang for your buck!

 

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Get you a Wester's tune and

an Outlaw Proformance intake an

hold on!!

 

JMO

[curly]

I agree with the tune.... biggest bang for the buck. A smooth intake tube of some sort before teh tune would probably pull a few ponies.

[c502cid]

Tune and a better flowing muffler. I think the factory pipe diameter is fine, just the muffler is on the restrictive side.

[Billdog350]

FIRST MOD SHOULD ALWAYS BE A CUSTOM TUNE!

 

Fuel economy improvement, increased power, better shifting, etc. Tuners over on FSC.com are reporting 50hp/50tq improvement at the crank just thru timing adjustments on a 6.0l!

 

I've done the intake, exhaust, etc on past vehicles and I just did a custom PCM tune on my 2003 2500HD 6.0 and I've NEVER felt as big of an improvement as when I did the tune....except for heads and cam on my 1997 LS1 C5....but that was 10x the cost of a good tune.

[steveR]

Stereo.

 

5440-5800lbs

what is 20-30 hp going to do?

 

 

Bitter Steve

[ATMINF]

I would also say that a PCM tune is the way to go. I just bought my truck when I got back from Iraq in OCT, and its a pretty basic 2500HD with the 4L80 Trans and 6.0L engine. It really woke the truck up. MOD wise I only put on a Flowmaster muffle and then the standard bedliner, step bars. The Muffler was really only because I like how it sounds, some say you will get some HP, but like the other post said our trucks are heavy, and you really need to add like 50+hp to notice anything.

The great thing with the PCM is that you get "all" of the power the motor really makes without the TQ management killing the timing(if you get a performance tune that removes the TQ Mgmt). So the truck does not fall on its face at the get go and then the motor can rev up to 5800-5900RPM. I got a Charlie Wheatly tune and it ran $250 bucks plus another $150 since I keep my original PCM(just in case). So I would say for a very very lighly modified truck like mine the PCM with a performance tune was a great bang for the buck tune.

On my old 95 Camaro I spent alot of money to go fast so now I am happy to say I can not break the bank and just be happy with a good performing truck, knowing that it is still a truck not a sports car. Good luck.

[Billdog350]

Remember, the PEAK gain might be 50 crank hp...but where you'll FEEL the gains are down low when you take off from a light....the torque management and dismal GM timing won't be holding you back. Before, full throttle from a stop with an empty bed and the truck couldn't break the tires loose. Now, jab 50% throttle and you need to let off because the back end goes sideways (no joke). If you logged your vehicle with a datalogger like EFI Live or PCMSCAN, you'd see for yourself. GM pulls your timing down to about 4 deg when you punch it from a stop.....which is HORRIBLE. I'm at 15 deg now with no knock and it REALLY moves.