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Looking to add some pep to my step

Questions about performance parts

Looking to add some pep to my step

Postby stevoacto [OP] » Jun 02 2011, 5:29am

I have a 2003 4.8L V8 and want to get a little more response when I push the pedal. I currently have a K&N Intake, converted to true dual exhaust with flowmaster mufflers, cut out the catalytic converters and had a performance tune done. While all of this has helped I am still looking for more. My next move is to replace the heads, headers and cam but I am looking to see if anyone has done this and if so what kind of parts did you use and what kind of difference have you seen? Both the guy that tuned my truck and my mechanic suggested this as my next step but told me to do a little research.
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Looking to add some pep to my step

Postby gmctruckguy » Jun 02 2011, 6:40am

Buy a 5.3l.
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Re: Looking to add some pep to my step

Postby stevoacto [OP] » Jun 02 2011, 7:49am

Not exactly what I was looking for gmctruckguy, but thanks!
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Re: Looking to add some pep to my step

Postby Onlyina_Chevy » Jun 02 2011, 10:33am

Well, if you are going to replace the cam, the heads, and get headers, then you are basically changing everything BUT the block. Granted, I'm no mechanic, but it seems you are going to invest a whole lot of money in a vehicle that has more 5.3s per build than 4.8s. I know two people that have ever had a 4.8 in a full size Chevy, and you are one of them. GMCtruckguy is on to a very good point. ...just sayin'
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Re: Looking to add some pep to my step

Postby stevoacto [OP] » Jun 02 2011, 9:32pm

Point is, my truck is paid for and it is less expensive to upgrade the one I have than to buy a new one. I originally thought about replacing the engine with a larger one.
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Looking to add some pep to my step

Postby Jrluz14 » Jun 03 2011, 4:08pm

Why go to a 5.3 and not a 6.0?? That'd be a pointless swap. But anyway to answer your question, get a set of LONG TUBE headers. That's one of the best mods you can do to wake it up. If you get a tune again after the headers are installed you'll get even more out of the mod. Then I'd go for a cam, a custom grind. Just call any cam company and they'll hook you up with what your looking to get out of the motor. Then start looking into a torque converter and gears. That'll all make your truck seem like a completely different truck.
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Re: Looking to add some pep to my step

Postby rdss » Jun 03 2011, 5:49pm

I would run a centrifugal style supercharger (ATI Procharger w/ intercooler or vortech intercooled) and headers with a custom tune and cams built for the S/C'er or a single or twin turbo setup with tuning. The remote turbo's where popular back in 05 when I still had my SS Silverado and a budy of mine was pushing well over 600 HP with his SS, but it was built.
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Re: Looking to add some pep to my step

Postby stevoacto [OP] » Jun 07 2011, 3:01am

Thank both of you for the recent replies. After much thought and consideration decided that the most practical step would be to upgrade from the 4.8 to a 6.0. From there I will have a bigger platform for future modifications and a newer engine with less miles.
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Re: Looking to add some pep to my step

Postby aksierra11 » Jun 07 2011, 4:00am

gmctruckguy wrote:Buy a 5.3l.

+1 4.8 is for those that still haul a load or tow a trailer here and there but want to try and keep decent fuel economy.

stevoacto wrote:Not exactly what I was looking for gmctruckguy, but thanks!





stevoacto wrote:Thank both of you for the recent replies. After much thought and consideration decided that the most practical step would be to upgrade from the 4.8 to a 6.0. From there I will have a bigger platform for future modifications and a newer engine with less miles.

Lol changed your mind about a new motor huh?
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Looking to add some pep to my step

Postby Jrluz14 » Jun 07 2011, 3:38pm

stevoacto wrote:Thank both of you for the recent replies. After much thought and consideration decided that the most practical step would be to upgrade from the 4.8 to a 6.0. From there I will have a bigger platform for future modifications and a newer engine with less miles.


BINGO! 6.0 is THE platform engine for more power. Glad you did some research on your own. Check out performancetrucks.net, there's a TON of threads about this swap.
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