my 5.3 build
Thread Starter
Teching In
Joined: Dec 2014
Posts: 22
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From: missouri
my 5.3 build I'm building my first ls based motor, just curious how you guys thinks these parts will do together.
Stock 5.3 block , stock crank, stock rods arp bolts, 4.8 pistons. Heads 862 with stainless valves, stock size exhaust , 2.02 intake, ported, roller rockers, trick flow springs. Cam is 232/234 , .595/.598 on 112. Have a stock truck intake and injectors , this is where I could use assistance. I'm unsure if I need a bigger throttle body or injectors. How do you think this combo will perform? Any advise will be appreciated.
Stock 5.3 block , stock crank, stock rods arp bolts, 4.8 pistons. Heads 862 with stainless valves, stock size exhaust , 2.02 intake, ported, roller rockers, trick flow springs. Cam is 232/234 , .595/.598 on 112. Have a stock truck intake and injectors , this is where I could use assistance. I'm unsure if I need a bigger throttle body or injectors. How do you think this combo will perform? Any advise will be appreciated.
TECH Veteran
Joined: Sep 2014
Posts: 4,893
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From: Mississippi
Well the problem with the truck intake you'll be limited to a smaller throttle body..... it's a great intake for torque but if you want to make a improvement on the intake without breaking the bank get you a Trailblazer SS intake it'll make more power and torque both and accept a 92mm throttle body. How do you plan on using the truck? Weekend toy? Daily driver?
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Verdad Gallardo Thread Starter
Teching In
Joined: Dec 2014
Posts: 22
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From: missouri
It's a off the shelf, I've noticed ls cams are spec'd strange, they give you the rpm range like on this cam is 2400-7000 but then you need like a 3500 stall to get it to work. Trans is a 350 turbo
My point was a cam that peaks at say 6500rpm in a 6.0l probably won't peak till 69-7000 in a 4.8l then to use the power curve right you need to rev 400rpm or so past peak.
Header and intake manifold choices can influence peak rpm as well.
Header and intake manifold choices can influence peak rpm as well.
Thread Starter
Teching In
Joined: Dec 2014
Posts: 22
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From: missouri
I knew what you meant 96capricemgr. I'm just a noob to this style motor. I'm used to the way cams are spec'd for sbc and similar style pushrod motors. But I was looking for looking for a cam with a pretty healthy chop and make good power. I'm mean if I'm putting a Chevy motor in a ford I want it to run. Where building 1 3/4 fenderwell headers for this truck, and I'm sure if need be I can change intake.
Thread Starter
Teching In
Joined: Dec 2014
Posts: 22
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From: missouri
Things have changed, a buddy of mine is giving me an ls1 block. So gonna get new pistons and possibly rods. Everything else should stay the same except for the intake. Is this a little better combo for the 5.7 over the 5.3
