Turbo 5.3 head gasket HELP!
06-20-2017, 02:04 PM
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Turbo 5.3 head gasket HELP! I am in the middle of building a Turbo 5.3 and need help on which head gasket to run. The 5.3 is carbed (with MSD 6LS) and has a stock bottom end, cam, new valve springs. It has 862 heads and stock bore. I need a head gasket that can handle boost. I am installing ARP head studs when i change head gaskets. I plan to run between 8 and 15 pounds of boost from a single 76mm turbo. I also am staying on pump gas. (I am new to this forum so i apologize if this question has been answered, i did not see it) What head gasket would work best for me?
06-21-2017, 12:00 PM
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Gas Filled O-Ring Seals Hi, I like the smaller bore of the 5.3 when fit with a LS-9/Felpro 1041 HG.
The LS-9 = 4.100" bore with a .051" compressed thickness.
The Felpro 1041 = 4.135" bore with a .041" compressed thickness.
Now you have the choice to fit a Gas Filled S/S O-Ring of .062" with receiver grove inside the HG bore.
This method is in common use among Turbo Race Engines.
Lance
The LS-9 = 4.100" bore with a .051" compressed thickness.
The Felpro 1041 = 4.135" bore with a .041" compressed thickness.
Now you have the choice to fit a Gas Filled S/S O-Ring of .062" with receiver grove inside the HG bore.
This method is in common use among Turbo Race Engines.
Lance
06-21-2017, 08:21 PM
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Sleves "Proud" Hi Andrew, thanks for the request !
There have been MANY engines wherein I have made the sleeves "proud".
The SAME method is to fit an O-Ring.
THUS a double "wall" or a "fire band" !
Lance
There have been MANY engines wherein I have made the sleeves "proud".
The SAME method is to fit an O-Ring.
THUS a double "wall" or a "fire band" !
Lance
09-25-2023, 02:54 PM
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Holley ECU? What did the logs show, air fuel, duty cycle etc
A buddy maxed out his fuel system last month and went 14:1 for a handful of passes, kinda suprised it's still alive.
A buddy maxed out his fuel system last month and went 14:1 for a handful of passes, kinda suprised it's still alive.
09-25-2023, 05:14 PM
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We run engines richer because we are attempting to keep the lean cylinders alive.
Andrew