408 stroker longevity
03-02-2016 | 12:23 PM
#1
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Joined: Nov 2015
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408 stroker longevity
Hey PT family, wanted to know if taking a gen 3 6.0 and turning it into a 408 would be a good choice. Any cons to this? And I keep hearing that stroker motors aren't reliable.
03-02-2016 | 02:33 PM
#5
I mean the person should have clarified... but i don't think they are full of ****. There's a reason I stayed stock stroke.
4" is a lot of stoke in an LS. Too much IMO. Yes they can make more power. There is truth in the whole 'no replacement for displacement' mantra. However, they tend to prematurely wear cyl walls and piston rings resulting in increased oil consumption. The Gen III blocks are more prone to this because the cyl walls dont come down quite as far as the Gen IV blocks do. The piston quite literally gets pulled out of the cyl at the bottom of its stroke, and as the crank swings past BDC to start its long journey around while forcing the piston upward, the piston rocks in the cyl bore and will often egg shape the cylinders.
If this engine is not going to get a lot of miles or street use then by all means go for it. I personally plan to have my motor in the truck for a long time with many street miles.
4" is a lot of stoke in an LS. Too much IMO. Yes they can make more power. There is truth in the whole 'no replacement for displacement' mantra. However, they tend to prematurely wear cyl walls and piston rings resulting in increased oil consumption. The Gen III blocks are more prone to this because the cyl walls dont come down quite as far as the Gen IV blocks do. The piston quite literally gets pulled out of the cyl at the bottom of its stroke, and as the crank swings past BDC to start its long journey around while forcing the piston upward, the piston rocks in the cyl bore and will often egg shape the cylinders.
If this engine is not going to get a lot of miles or street use then by all means go for it. I personally plan to have my motor in the truck for a long time with many street miles.
03-02-2016 | 03:15 PM
#6
Thread Starter
TECH Enthusiast
Joined: Nov 2015
Posts: 536
Likes: 7
I mean the person should have clarified... but i don't think they are full of ****. There's a reason I stayed stock stroke.
4" is a lot of stoke in an LS. Too much IMO. Yes they can make more power. There is truth in the whole 'no replacement for displacement' mantra. However, they tend to prematurely wear cyl walls and piston rings resulting in increased oil consumption. The Gen III blocks are more prone to this because the cyl walls dont come down quite as far as the Gen IV blocks do. The piston quite literally gets pulled out of the cyl at the bottom of its stroke, and as the crank swings past BDC to start its long journey around while forcing the piston upward, the piston rocks in the cyl bore and will often egg shape the cylinders.
If this engine is not going to get a lot of miles or street use then by all means go for it. I personally plan to have my motor in the truck for a long time with many street miles.
4" is a lot of stoke in an LS. Too much IMO. Yes they can make more power. There is truth in the whole 'no replacement for displacement' mantra. However, they tend to prematurely wear cyl walls and piston rings resulting in increased oil consumption. The Gen III blocks are more prone to this because the cyl walls dont come down quite as far as the Gen IV blocks do. The piston quite literally gets pulled out of the cyl at the bottom of its stroke, and as the crank swings past BDC to start its long journey around while forcing the piston upward, the piston rocks in the cyl bore and will often egg shape the cylinders.
If this engine is not going to get a lot of miles or street use then by all means go for it. I personally plan to have my motor in the truck for a long time with many street miles.
03-02-2016 | 03:28 PM
#7
The 408 uses a 4.030 bore while the 6.2 uses a 4.065 bore. If you stroke a Gen 4 6.2 you are left with a 416CI.
What supercharger are you running? The extra cubes may not even be worth it.
What supercharger are you running? The extra cubes may not even be worth it.
