High compression LS3 Pistons with stock rods?
05-20-2018, 12:08 PM
#1
High compression LS3 Pistons with stock rods? Does anyone make a shelf piston that's high comp 12.5-13.5:1? With a stock Chambered ls3 head? This would've need a +5 - +7 cc dome I think ? Nonnedd for forged rods as this is going to be straight N/A motor .
05-22-2018, 07:04 PM
#2
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Off the shelf, probably not. That is a very rare configuration. I ordered a set of forged JE piston like that. With that much compression you will need to run high octane (non leaded) race fuel, or retard a lot timing to eliminate spark knock.
Buying race fuel is expensive and a pain to find. The next motor I built had forged flat tops. What a relief to pull into the gas station and say "Fill er Up".
My experience was that boosting compression was not a good way to gain power. Too difficult to find fuel. Add a little bit of camshaft, and a LS3 will be a screamer.
Buying race fuel is expensive and a pain to find. The next motor I built had forged flat tops. What a relief to pull into the gas station and say "Fill er Up".
My experience was that boosting compression was not a good way to gain power. Too difficult to find fuel. Add a little bit of camshaft, and a LS3 will be a screamer.
05-22-2018, 07:35 PM
#3
Off the shelf, probably not. That is a very rare configuration. I ordered a set of forged JE piston like that. With that much compression you will need to run high octane (non leaded) race fuel, or retard a lot timing to eliminate spark knock.
Buying race fuel is expensive and a pain to find. The next motor I built had forged flat tops. What a relief to pull into the gas station and say "Fill er Up".
My experience was that boosting compression was not a good way to gain power. Too difficult to find fuel. Add a little bit of camshaft, and a LS3 will be a screamer.
Buying race fuel is expensive and a pain to find. The next motor I built had forged flat tops. What a relief to pull into the gas station and say "Fill er Up".
My experience was that boosting compression was not a good way to gain power. Too difficult to find fuel. Add a little bit of camshaft, and a LS3 will be a screamer.
05-22-2018, 08:20 PM
#4
JE makes them. I'm in the exact same boat. Looking for 11.0-11.2 :1 compression out of a LS3 motor with stock rods. They're +10cc and you could run a thicker gasket to drop compression to the desired level
Only other option I'm seeing is mill the heads and cut valve reliefs in the pistons.
http://www.jepistons.com/Catalogs/Au...m_ls_dome.aspx
Only other option I'm seeing is mill the heads and cut valve reliefs in the pistons.
http://www.jepistons.com/Catalogs/Au...m_ls_dome.aspx
05-23-2018, 08:00 AM
#5
JE makes them. I'm in the exact same boat. Looking for 11.0-11.2 :1 compression out of a LS3 motor with stock rods. They're +10cc and you could run a thicker gasket to drop compression to the desired level
Only other option I'm seeing is mill the heads and cut valve reliefs in the pistons.
http://www.jepistons.com/Catalogs/Au...m_ls_dome.aspx
Only other option I'm seeing is mill the heads and cut valve reliefs in the pistons.
http://www.jepistons.com/Catalogs/Au...m_ls_dome.aspx
