Largest stroke for Standard Deck LSX?
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Largest stroke for Standard Deck LSX? Getting ready to start planning on a build with a standard deck LSX block. I picked the block up second hand and will be running a 4.200 bore (not necessarily because I want to, that is what it will take to get scoring out of one of the walls.)
I'm getting ready to order rotating assembly parts and I was curious as to what the longest stroke you could run in that block is? I don't really want to mess with clearancing the bottom end, so I guess I just need to know what the largest stroke crank is that will fit without modification. I've seen a couple of people saying you can go up to a 4.250 stroke, but I'm still unsure. Also, what size rods are being run with this setup?
Thanks in advance guys!
Ethan
I'm getting ready to order rotating assembly parts and I was curious as to what the longest stroke you could run in that block is? I don't really want to mess with clearancing the bottom end, so I guess I just need to know what the largest stroke crank is that will fit without modification. I've seen a couple of people saying you can go up to a 4.250 stroke, but I'm still unsure. Also, what size rods are being run with this setup?
Thanks in advance guys!
Ethan
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I've read that you can go as high 4.250, but even at 4.000 (6.125 rods) we were adding washers and mangling the windage tray in an F-body pan. The rod bolts on the H-beams were kind of beefy, and kept banging off center on the tray. I'm glad we didn't try to go longer, although with enough parts and effort it probably could have been made to work.
If you're going with some sort of FI later, a lot of people will you not to go over 4.000 as well. Longer strokes are fine for NA, if you can make them fit.
If you're going with some sort of FI later, a lot of people will you not to go over 4.000 as well. Longer strokes are fine for NA, if you can make them fit.
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From: Indianapolis, Indiana
Thanks for the info, this will be a NA build for the life of the engine. I was considering running an fbody pan. How big of a pain was it to get the pan to work?
thanks!
thanks!
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A nice write-up here:
https://ls1tech.com/forums/generatio...4-stroker.html
I think Mast makes a special windage tray for strokers, and GMPP makes several:
https://ls1tech.com/forums/generatio...ge-tray-2.html
I do not know the limits of any particular pan, but things seem to start pushing the margins of a standard F-body pan around 4.125, for sure.
https://ls1tech.com/forums/generatio...dage-tray.html
https://ls1tech.com/forums/generatio...4-stroker.html
I think Mast makes a special windage tray for strokers, and GMPP makes several:
https://ls1tech.com/forums/generatio...ge-tray-2.html
I do not know the limits of any particular pan, but things seem to start pushing the margins of a standard F-body pan around 4.125, for sure.
https://ls1tech.com/forums/generatio...dage-tray.html
Last edited by Capricio; Oct 17, 2012 at 04:02 PM.
Getting ready to start planning on a build with a standard deck LSX block. I picked the block up second hand and will be running a 4.200 bore (not necessarily because I want to, that is what it will take to get scoring out of one of the walls.)
I'm getting ready to order rotating assembly parts and I was curious as to what the longest stroke you could run in that block is? I don't really want to mess with clearancing the bottom end, so I guess I just need to know what the largest stroke crank is that will fit without modification. I've seen a couple of people saying you can go up to a 4.250 stroke, but I'm still unsure. Also, what size rods are being run with this setup?
Thanks in advance guys!
Ethan
I'm getting ready to order rotating assembly parts and I was curious as to what the longest stroke you could run in that block is? I don't really want to mess with clearancing the bottom end, so I guess I just need to know what the largest stroke crank is that will fit without modification. I've seen a couple of people saying you can go up to a 4.250 stroke, but I'm still unsure. Also, what size rods are being run with this setup?
Thanks in advance guys!
Ethan
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From: Indianapolis, Indiana
Are you sure you mean 4.200 bore and not a 4.020 bore? I don't think there will much left of the cylinder walls if you bored it to a 4.2 inch bore. If thats the case, you won't be able to run any power adders. As for the stroker cranks, be mindful to the fact that the longer the stroke, the more wear there will be on the cylinder walls and piston skirts. The connecting rod angles become more exaggerated with a bigger crank throw.
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Thread Starter
11 Second Club
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Joined: Jan 2009
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From: Indianapolis, Indiana
Yeah, I've contacted JE and Wiseco both and they said they do not carry a "shelf grind" that large. I've decided I'm going to go with a 4.125 stroke and a 6.125 rod.
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