Stroked 5.3
Stroked 5.3 Anyone here have an opinion on stroking these newer 5.3's and boosting them? I'm talking about stock bore size and a 4" crank so basically 350ci. Ive got some pretty radical plans for this LH6 motor (1/2" studs, Athena gaskets etc.) just curious to hear from anyone who has stroked one out and boosted the hell out of it.
Last edited by oscs; Apr 7, 2017 at 01:11 PM.
The guys that got the "sbe" 5.3 in the 4's ended up making a 363 out of their 5.3 with a 3.8 bore and 4" stroke.
http://www.yellowbullet.com/forum/sh...+stock&page=35
http://www.yellowbullet.com/forum/sh...+stock&page=35
Great thread minus the bickering in the beginning. He mentioned some oiling modifications that the engine builder made to achieve a better "film" over the thrust bearing. He also made mention of a "common" oiling modification they did to the mains? I'd love to hear more about that but it doesn't seem like he's fully aware of what was done to it.
The oiling mods to the thrust are just slits in the bearings if it's the same as the ones everyone else always talks about.
I had a little motor I'm doing the same with. Gen4 alum block, dry sump 4in crank, 6.098 rods, and a 3.8 bore custom piston and big pin.
I'm worried about 1/2in studs on the alum block. So haven't decided on that yet
I had a little motor I'm doing the same with. Gen4 alum block, dry sump 4in crank, 6.098 rods, and a 3.8 bore custom piston and big pin.
I'm worried about 1/2in studs on the alum block. So haven't decided on that yet
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Originally Posted by blackonblacksls
The oiling mods to the thrust are just slits in the bearings if it's the same as the ones everyone else always talks about.
I had a little motor I'm doing the same with. Gen4 alum block, dry sump 4in crank, 6.098 rods, and a 3.8 bore custom piston and big pin.
I'm worried about 1/2in studs on the alum block. So haven't decided on that yet
I had a little motor I'm doing the same with. Gen4 alum block, dry sump 4in crank, 6.098 rods, and a 3.8 bore custom piston and big pin.
I'm worried about 1/2in studs on the alum block. So haven't decided on that yet
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Originally Posted by blackonblacksls
The oiling mods to the thrust are just slits in the bearings if it's the same as the ones everyone else always talks about.
I had a little motor I'm doing the same with. Gen4 alum block, dry sump 4in crank, 6.098 rods, and a 3.8 bore custom piston and big pin.
I'm worried about 1/2in studs on the alum block. So haven't decided on that yet
I had a little motor I'm doing the same with. Gen4 alum block, dry sump 4in crank, 6.098 rods, and a 3.8 bore custom piston and big pin.
I'm worried about 1/2in studs on the alum block. So haven't decided on that yet
I've seen where guys drilled through the thrust flange of the bearing into the main saddle to intersect the oil passage to the mains. The intent is to directly supply oil to the thrust, but all the oil going to the #3 bearing comes out the sides and into the thrust face anyways. Not sure how much it really helps.
Originally Posted by KCS
I've seen where guys drilled through the thrust flange of the bearing into the main saddle to intersect the oil passage to the mains. The intent is to directly supply oil to the thrust, but all the oil going to the #3 bearing comes out the sides and into the thrust face anyways. Not sure how much it really helps.
What is the real benefit of stroking it anyway? (
)
Most performance turbo engines destroke. Just an observation, not trying to start $hit. After seeing how well capazzi is doing revving the factory stroke SBE 5.3 to 8300... I'd think that woudl be more beneficial. Would be cool to see either way.
) Most performance turbo engines destroke. Just an observation, not trying to start $hit. After seeing how well capazzi is doing revving the factory stroke SBE 5.3 to 8300... I'd think that woudl be more beneficial. Would be cool to see either way.
Last edited by Forcefed86; Apr 10, 2017 at 07:08 PM.
Originally Posted by Forcefed86
What is the real benefit of stroking it anyway? ()
Most performance turbo engines destroke. Just an observation, not trying to start $hit. After seeing how well capazzi is doing revving the factory stroke SBE 5.3 to 8300... I'd think that woudl be more beneficial. Would be cool to see either way.
) Most performance turbo engines destroke. Just an observation, not trying to start $hit. After seeing how well capazzi is doing revving the factory stroke SBE 5.3 to 8300... I'd think that woudl be more beneficial. Would be cool to see either way.
I'd think with relatively small cubes you'd get the most efficiency and power using light weight small parts at higher RPM. Lose converter and pump tons of power to it well over 5k.
Last edited by Forcefed86; Apr 10, 2017 at 08:28 PM.
Well yeah, but I think the intent is to supply that pressure directly to the thrust face rather than just relying on what comes out the sides of the bearing. I don't really know if it works or not; its just something I've seen others try out.
Originally Posted by KCS
Well yeah, but I think the intent is to supply that pressure directly to the thrust face rather than just relying on what comes out the sides of the bearing. I don't really know if it works or not; its just something I've seen others try out.
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What is the real benefit of stroking it anyway? ()
Most performance turbo engines destroke. Just an observation, not trying to start $hit. After seeing how well capazzi is doing revving the factory stroke SBE 5.3 to 8300... I'd think that woudl be more beneficial. Would be cool to see either way.
) Most performance turbo engines destroke. Just an observation, not trying to start $hit. After seeing how well capazzi is doing revving the factory stroke SBE 5.3 to 8300... I'd think that woudl be more beneficial. Would be cool to see either way.
Where is the weak link on the LS when it comes to high high revs? The oiling system mostly? I am speaking to built bottom ends, not SBE.
The valvetrain can be resolved using rather conventional methods...