L33 for Marine Build - Torque Mods
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L33 for Marine Build - Torque Mods Building a Jet boat. Pretty set on a 5.3 L33 due to weight and cost. Boat will cruise at 3200 rpm. Boat will have exhaust manifolds to 3" to atmosphere (only about 24" of exhaust after manifolds). My goal is to hit 380-400 ft lbs at 3000-3200 rpm. What is the best way to do this? Is this realistic? BUDGET BUILD!
Does anybody have an actual power curve of the L33? Everything I search seems different and it's tough to trust anything. I've done a TON of searching on here regarding this motor, however, my application is a little different.
All feedback is greatly appreciated.
Does anybody have an actual power curve of the L33? Everything I search seems different and it's tough to trust anything. I've done a TON of searching on here regarding this motor, however, my application is a little different.
All feedback is greatly appreciated.
The L33 is pretty close to the GM 5.3 crate motor. You're probably not going to get there with a NA 5.3. Check out the links below for the 5.3 torque curve and a real dyno test of the the higher compression LQ9 6.0.
http://www.chevroletperformance.com/...5628&engCat=ls
http://www.hotrod.com/techarticles/e...#ixzz21ehbAsre
http://www.chevroletperformance.com/...5628&engCat=ls
http://www.hotrod.com/techarticles/e...#ixzz21ehbAsre
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I checked it out on the Comp Cams website. No dynosheets specific to the L33 though. Anybody have realistic dyno sheets with their mods?
The GM dynosheet for a stock L33 says peak torque of 335 lb ft. Is this at the crank, or rear wheel?
The GM dynosheet for a stock L33 says peak torque of 335 lb ft. Is this at the crank, or rear wheel?
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Depends on how good you are with a screwdriver. Most people that can't get good power or fuel economy out of a carb don't know much about them.
That being said, generally, you can do better fine tuning on injection which helps out tremendously with fuel economy. Power wise, if you know what your doing, it's negligible.
That being said, generally, you can do better fine tuning on injection which helps out tremendously with fuel economy. Power wise, if you know what your doing, it's negligible.
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Verdad Gallardo I think the cam grind on most truck motors is optimized for low end, same with the intake. You might get some more torque at 3000 rpm with more lift, but getting 400ft lbs is probably not realistic in a 5.3.
btw, the carb intakes flow much more top end than the efi. With a cam you'll make more hp with a carb.
btw, the carb intakes flow much more top end than the efi. With a cam you'll make more hp with a carb.
performer dual plane with a carb and a Zo6 cam or prefferably this one
http://www.engpwrsys.com/index.php?a...od&productId=4
should get you close to what you are looking for. what fuel will you be using
http://www.engpwrsys.com/index.php?a...od&productId=4
should get you close to what you are looking for. what fuel will you be using
