boring a 5.3 to 3.903
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Joined: Oct 2013
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From: bemidji mn
boring a 5.3 to 3.903 Just a few questions about boring to 3.903 with my 5.3l. When doing so would running the wiseco 464x3903 piston be a good choice when running stock heads that have been ported and polished? I plan on using cali compstar rods 6.125 and my stock crank. With the pistons the have a -3.2 dish and I was thinking of running as thicker head gaskets so the compression stays in the 10 range. Would like to here feed back and if people have done simular things. Thanks
I would check the compression height/rod length on that combo. My calculations are showing that your pistons will be in the bore 0.175"
9.240" Deck - 6.125" Rod - 1.83" (3.66 stroke / 2) = 1.285"
1.285" - the compression height of 1.110 on those pistons = 0.175"
To calculate the compression ratio you also need the diameter AND thickness of the head gaskets you're using as well as the chamber size of the heads.
9.240" Deck - 6.125" Rod - 1.83" (3.66 stroke / 2) = 1.285"
1.285" - the compression height of 1.110 on those pistons = 0.175"
To calculate the compression ratio you also need the diameter AND thickness of the head gaskets you're using as well as the chamber size of the heads.
I would check the compression height/rod length on that combo. My calculations are showing that your pistons will be in the bore 0.175"
9.240" Deck - 6.125" Rod - 1.83" (3.66 stroke / 2) = 1.285"
1.285" - the compression height of 1.110 on those pistons = 0.175"
To calculate the compression ratio you also need the diameter AND thickness of the head gaskets you're using as well as the chamber size of the heads.
9.240" Deck - 6.125" Rod - 1.83" (3.66 stroke / 2) = 1.285"
1.285" - the compression height of 1.110 on those pistons = 0.175"
To calculate the compression ratio you also need the diameter AND thickness of the head gaskets you're using as well as the chamber size of the heads.
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
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Joined: Jun 2011
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From: Katy, TX
Just a few questions about boring to 3.903 with my 5.3l. When doing so would running the wiseco 464x3903 piston be a good choice when running stock heads that have been ported and polished? I plan on using cali compstar rods 6.125 and my stock crank. With the pistons the have a -3.2 dish and I was thinking of running as thicker head gaskets so the compression stays in the 10 range. Would like to here feed back and if people have done simular things. Thanks
http://www.performancetrucks.net/for...2500-a-520418/
Thread Starter
Teching In
Joined: Oct 2013
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From: bemidji mn
With the 4" stroke can you use the stock crank?
