Stock 4.8 needing help with my build
03-03-2015, 09:46 PM
#1
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Stock 4.8 needing help with my build I have a 2002 Sierra ext with 4.8 I was wanting to turbo my truck with a cxracing turbo kit has t4 turbo waste gate inter cooler manifolds with flange all piping for $2500 I was wanting know what else I will have to do to the truck to run it and not blow it up after a couple passes the system will be running at around 10-12lb of boost I think and was also looking into the Holley efi high rise 92 mm and throttle body maybe help it breath better but I could really use some experienced help thanks in advance
03-04-2015, 05:22 AM
#2
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I like the KB racing kits for trucks.
Regardless of which one you get, you'll need injectors and a pump, and a way to tune since turbo kits don't typically come with this stuff.
Skip the intake. 10 lbs on a stock 4.8 isnt exactly something that requires the huge flow of the hi ram.
Regardless of which one you get, you'll need injectors and a pump, and a way to tune since turbo kits don't typically come with this stuff.
Skip the intake. 10 lbs on a stock 4.8 isnt exactly something that requires the huge flow of the hi ram.
03-04-2015, 09:07 AM
#4
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Valve springs are always a good idea with boost, but at 10 lbs they aren't 100% necessary with a stock cam. If you want to upgrade them without tearing it all apart, PAC1218 springs are cheap with relatively low seat pressure so you won't need to upgrade push rods. You can also run a mild cam with these springs no problem.
As for injectors, the tried and true 80 lbs Siemens Deka injectors are a major favorite around here. They run $320-340 new.
As for injectors, the tried and true 80 lbs Siemens Deka injectors are a major favorite around here. They run $320-340 new.
03-04-2015, 02:03 PM
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Was also lookin at the on 3 kit it's cheaper and a lot of ppl said it was damn good for the price it would save me 600 and I looked at the kb kit and its a lil out my price range
03-04-2015, 02:11 PM
#7
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The 432HP is a pump and canister all in one. You could save 90 bucks by getting just the pump.
I would honestly go with something that flows more. 255 LPH is enough for 10 PSI, but eventually you'll crave more power.
A 340 LPH pump can be had for the same price, and a 400 LPH pump can be had from walbro for a few bucks more.
I would honestly go with something that flows more. 255 LPH is enough for 10 PSI, but eventually you'll crave more power.
A 340 LPH pump can be had for the same price, and a 400 LPH pump can be had from walbro for a few bucks more.