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Old August 1st, 2009, 02:24 AM   #1
Konaishxc
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4.8 V8 power help & torsion bar crank?

I jus recently bought a 2003 Silverado 1500 4x4 and im sad to say that it has the 4.8 v8. I have a little bit of money to put into it right now but im debating on what will give me the most power. Im looking from everything from headers to performance chips. Anyone know my best option?

Also i know that my truck has the torsion bar crank and I was jus wondering if anyone knew the widest tire i could fit without rubbing?

Thanks!!
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Old August 1st, 2009, 08:29 AM   #2
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I would do headers and full exhaust with a cold air intake and a tune. That really woke my buddies up. I am pretty sure as far as tires go you can fit 285's.
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Old August 1st, 2009, 08:57 AM   #3
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285's would be max and depending on the wheel and you may have to trim the air dam a bit.

A good air intake, cat back exhaust and a tune would give it some more oomph.
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Old August 1st, 2009, 11:39 AM   #4
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thanks guys and yeah i currently have 285/75/R16 but some people said that i could possibly fit a 33/12.5.

and i think ill start out with the headers. jus gota wait till next check
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Old August 20th, 2009, 09:31 PM   #5
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umm id keep manifolds if i was you... just my 2 cents... id definitally go with a catback system or open it up to dual exhaust. id also look for an aftermarket air intake....my brother sure woke up hi 01 gmc when we played around with it.
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Old August 20th, 2009, 09:35 PM   #6
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Supercharger. But on a budget a good high flow cat , cai , headers and a full exhaust will all give you added power. Check out pcmforless.com they can firm up the shifts and do the same thing as a hypertech for less money.

I'm sure you know this but make sure to get an alignment after the torsion bar crank.
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Old August 22nd, 2009, 12:41 AM   #7
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If it's been a while since your last tune up I would highly suggest it. I recently did plugs, wires, cap, rotor, and it surely woke up my truck. pretty soon I'm doing headers (cracked manifold before 02 sensor FTL) and this http://www.summitracing.com/parts/MSD-8226/ . My logic is a more powerful spark will burn more efficent.
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Old August 29th, 2009, 02:21 PM   #8
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thanks guys. yeah i have a knock off magnaflow cat back exhaust. i would love supercharger but i dont think thats quite in a college students price range. i think ill start with a chip and headers
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Old September 6th, 2009, 02:36 PM   #9
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if your really looking for more power on a budget swap in a 6.0 from a 3/4 ton truck, easy swap and fairly cheap too
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Old September 7th, 2009, 11:59 PM   #10
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Quote:
Originally Posted by jmw55018 View Post
umm id keep manifolds if i was you... just my 2 cents... id definitally go with a catback system or open it up to dual exhaust. id also look for an aftermarket air intake....my brother sure woke up hi 01 gmc when we played around with it.




Anyways, yes, headers/exhaust and an intake will help.

But dont be cheap on the headers. I assume you're on a tight budget since you mentioned being a student, but cheap headers will cost you more in the long run.

Get longtubes, and get them ceramic coated. They will last as long as you need them to, and the longtubes will give you a bit better performance gains than shorties.

Believe me, DO NOT GO CHEAP. I've bought two different sets now, and pretty close to needing a third set because Edelbrock's stupid Ti-tech coating didnt last any better than paint. I regret not buying ceramic from the start. If you have trouble getting the money, just scrounge and save until you can afford it. You'll be more dissapointed a year or two later when you're replacing the cheap-o's, then when you have to wait to do buy the goodies.
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Old September 9th, 2009, 06:45 AM   #11
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Agreed. Do not go cheap on headers.
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