Help with LS2 Stroker Build
#1
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Help with LS2 Stroker Build
Looking to build a motor that will put down 500 RWHP through a T56 and built 8.8.
Got a LS2 short block for a decent price because it had a failed rod bearing.
I've purchased some LSA heads for a decent price already.
I was going to buy a complete rotating assembly but found a couple pieces locally. Just trying to save a few bucks. Would like some opinions on the parts available to me.
Compstar LS2 Stroker Crank and H beam Rods - Lightly used
$1000 US
Wiseco K464X05 Piston Kit - New
Chevy LS -3cc Dome 4.005" Bore
$850 US
I know I should find pistons that will give me a compression bump while having valve reliefs so I can run a bigger cam with the LSA heads. Would this get me going in the right direction?
Thanks for any help.
Got a LS2 short block for a decent price because it had a failed rod bearing.
I've purchased some LSA heads for a decent price already.
I was going to buy a complete rotating assembly but found a couple pieces locally. Just trying to save a few bucks. Would like some opinions on the parts available to me.
Compstar LS2 Stroker Crank and H beam Rods - Lightly used
$1000 US
Wiseco K464X05 Piston Kit - New
Chevy LS -3cc Dome 4.005" Bore
$850 US
I know I should find pistons that will give me a compression bump while having valve reliefs so I can run a bigger cam with the LSA heads. Would this get me going in the right direction?
Thanks for any help.
#3
Old School Heavy
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Looking to build a motor that will put down 500 RWHP through a T56 and built 8.8.
Got a LS2 short block for a decent price because it had a failed rod bearing.
I've purchased some LSA heads for a decent price already.
I was going to buy a complete rotating assembly but found a couple pieces locally. Just trying to save a few bucks. Would like some opinions on the parts available to me.
Compstar LS2 Stroker Crank and H beam Rods - Lightly used
$1000 US
Wiseco K464X05 Piston Kit - New
Chevy LS -3cc Dome 4.005" Bore
$850 US
I know I should find pistons that will give me a compression bump while having valve reliefs so I can run a bigger cam with the LSA heads. Would this get me going in the right direction?
Thanks for any help.
Got a LS2 short block for a decent price because it had a failed rod bearing.
I've purchased some LSA heads for a decent price already.
I was going to buy a complete rotating assembly but found a couple pieces locally. Just trying to save a few bucks. Would like some opinions on the parts available to me.
Compstar LS2 Stroker Crank and H beam Rods - Lightly used
$1000 US
Wiseco K464X05 Piston Kit - New
Chevy LS -3cc Dome 4.005" Bore
$850 US
I know I should find pistons that will give me a compression bump while having valve reliefs so I can run a bigger cam with the LSA heads. Would this get me going in the right direction?
Thanks for any help.
Combine that with the right LS stroker camshaft for your application, some good 1 7/8" headers and you should reach your goal no problem.
#4
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For compression I was aiming for 10.7:1 which is what stock is for the LS3 or a bit higher. I don't plan on using forced induction.
There wouldn't be any issue running those pistons with the rod and crank mentioned? I've never spec'd pistons to cranks/rods before.
Thanks
Jake
There wouldn't be any issue running those pistons with the rod and crank mentioned? I've never spec'd pistons to cranks/rods before.
Thanks
Jake
#5
On The Tree
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For compression I was aiming for 10.7:1 which is what stock is for the LS3 or a bit higher. I don't plan on using forced induction.
There wouldn't be any issue running those pistons with the rod and crank mentioned? I've never spec'd pistons to cranks/rods before.
Thanks
Jake
There wouldn't be any issue running those pistons with the rod and crank mentioned? I've never spec'd pistons to cranks/rods before.
Thanks
Jake
Deck height of LS block = 9.240"
Stroke 4"/2 = 2"
con rod length 6.125"
piston height 1.115"
Total = 9.240" so zero deck height
Now you can use any of the compression calculators available. input your valve release size combustion chamber size and head gasket thickness and you're set.
#6
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With a properly spec'ed cam and optimal quench (.035" to .040").....12:1 in a daily driver = no sweat.
KW
Last edited by KW Baraka; 12-27-2016 at 02:51 PM.
#7
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According to my numbers, those pistons will give you just over 11:1 compression with a stock .051" head gasket assuming they have a .000" deck height.
A .041" thick Fel Pro 1161 series head gasket would bump that up to just over 11.3:1 which is what I would do............
A .041" thick Fel Pro 1161 series head gasket would bump that up to just over 11.3:1 which is what I would do............
KW
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#8
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According to my numbers, those pistons will give you just over 11:1 compression with a stock .051" head gasket assuming they have a .000" deck height. A .041" thick Fel Pro 1161 series head gasket would bump that up to just over 11.3:1 which is what I would do. Here are my numbers:
Combine that with the right LS stroker camshaft for your application, some good 1 7/8" headers and you should reach your goal no problem.
Combine that with the right LS stroker camshaft for your application, some good 1 7/8" headers and you should reach your goal no problem.
From the looks of it, I put in an -3cc volume for a dome. You have a -3cc volume for a valve relief. Not sure which is correct.
Sure you can run it without issues, plenty of people do. You just don't really see a gain because of how much timing gets pulled to keep it from pinging on those hot summer days. Especially if you actually race it.
#12
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When your machinist builds your engine, he can cut the deck of the block so that your pistons stick further out and reduce the quench distance. Most prefer .035-.040" as a good safe quench, but others have run less. When you run tighter than .035", you really need to make sure you have accurate measurements because you run the risk of the pistons hitting the head.
#14
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I also see that the compression height of that piston is .005" in the hole unless you deck the block.
Lastly, they do not specify the head gasket dimensions. So, there is another variable.
#16
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It's weird how I used the Wallace racing calculator with the same info and got almost a point higher.
From the looks of it, I put in an -3cc volume for a dome. You have a -3cc volume for a valve relief. Not sure which is correct.
Sure you can run it without issues, plenty of people do. You just don't really see a gain because of how much timing gets pulled to keep it from pinging on those hot summer days. Especially if you actually race it.
From the looks of it, I put in an -3cc volume for a dome. You have a -3cc volume for a valve relief. Not sure which is correct.
Sure you can run it without issues, plenty of people do. You just don't really see a gain because of how much timing gets pulled to keep it from pinging on those hot summer days. Especially if you actually race it.
#18
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What would be the general consensus on the compression ratio? Should I take a bit off the block to ensure straightness and run the thinner head gasket? I don't want to sacrifice too much PTV clearance for the cam.
Bit the bullet on the pistons.
Bit the bullet on the pistons.