416 Boosted LS3 durablity/longevity ?
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416 Boosted LS3 durablity/longevity ?
I want to hear from the engine builders who build and tear these things down. Plan is to boost one with about 16-18psi, and I'm not concerned with the parts in the block, its more with the block itself.
Are the cyclinders moving around? core shift? warping?
Are you getting odd wear on the cylinder walls?
Lets hear it
Are the cyclinders moving around? core shift? warping?
Are you getting odd wear on the cylinder walls?
Lets hear it
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With the amount of boost you are looking for it will be fine using LS3 block but make sure :-
- Crankshaft 4" or lower
- Piston rings gap for FI application
- Correct quench area
- Proper head gaskets (Alot of FI guys are using the LS9)
- Aftermarket Heads for thicker deck or LSA/LS9 Heads
- Crankshaft 4" or lower
- Piston rings gap for FI application
- Correct quench area
- Proper head gaskets (Alot of FI guys are using the LS9)
- Aftermarket Heads for thicker deck or LSA/LS9 Heads
Last edited by Cold Zero; 03-02-2015 at 11:51 AM.
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With the amount of boost you are looking for it will be fine using LS3 block but make sure :-
- Crankshaft 4" or lower
- Piston rings gap for FI application
- Correct quench area
- Proper head gaskets (Alot of FI guys are using the LS9)
- Aftermarket Heads for thicker deck or LSA/LS9 Heads
- Crankshaft 4" or lower
- Piston rings gap for FI application
- Correct quench area
- Proper head gaskets (Alot of FI guys are using the LS9)
- Aftermarket Heads for thicker deck or LSA/LS9 Heads
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Aftermarket castings are thicker (3/4" vs 3/8" I believe, and some as cast may go to 0.800"). And It is not about the thickness, but the material used in those casting which way better than OEM. LSA OEM heads have been proved to have better materials than other OEM castings.
Anyhow, nothing wrong with LS3 stock heads, but the OP is talking about "Durability/Longevity". To save the block you have do other things right.
Anyhow, nothing wrong with LS3 stock heads, but the OP is talking about "Durability/Longevity". To save the block you have do other things right.
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The tune has to be correct and they will last if done right on the machining and assembly part
Stock stroke cranks have more overlap then stroked ones and hold up to 1000hp,if you want to do things right get a center counterweight crank that is what most cheap out on and bites them in the *** later down the road.
The block itself Is allso a limiting factor at 1000hp mark with stock sleeves
Stock stroke cranks have more overlap then stroked ones and hold up to 1000hp,if you want to do things right get a center counterweight crank that is what most cheap out on and bites them in the *** later down the road.
The block itself Is allso a limiting factor at 1000hp mark with stock sleeves
#11
From what I read, the better LS heads, LSA/LS9/LSX , have 5/8" thick sealing surface.
Whether this is true, who knows.
Whether this is true, who knows.
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All good info here, but lets leave the head discussions out of it. Still looking for those who have torn them down after a few years of boosted abuse to see how they fair.
Ari - are you talking 1000 fwhp or rwhp?
Ari - are you talking 1000 fwhp or rwhp?
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Ari..... good info bro about the stock sleeves. Most guys don't think about the sleeves. On the other hand while you brought that up a darton sleeved 5.3 aluminum can take up to 1500 hp is what I been told.
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There is no x number just an estimation some have 1000rwhp and last a while but after sleeving they can take more abuse but oem main caps are weak at that
A blower setup is harsher on the crank and you need to make more cyllender pressure with it to match a turbo setup for the losses so with that in mind
Cast iron blocks 5.3 and 6.0s are the best choice for boosted and nitrous stuff because of their rigidity in the cyllenders
A blower setup is harsher on the crank and you need to make more cyllender pressure with it to match a turbo setup for the losses so with that in mind
Cast iron blocks 5.3 and 6.0s are the best choice for boosted and nitrous stuff because of their rigidity in the cyllenders
Last edited by Ari G; 03-04-2015 at 03:27 AM.