looking to build a 427 ls3 is this right?
LS1Tech Sponsor
Joined: Sep 2004
Posts: 825
Likes: 568
Guys
A stock LS3 block has a short sleeve.....about 5.500 long.
Even a 4" stroke pulls the piston out of the bore more than you would like but there are many out there and they seem to have a decent track record for solid long term reliability....pulling it out the hole another 1/8" IMO is the potential straw that breaks the camels back giving you long term piston rock issues and faster bore and skirt wear.
It wont make any more power.....the heads and induction dictate that.....a few more ft/lbs of torque but at the expense of what I just mentioned.
A Darton sleeved block on the other hand is 5.700 - 5.750 in length.....that means you can run a 4.125 stoke in that block and have less wear and tear than a stock block with a 4" stroke.....in fact the piston is further up the bore by an additional 1/8" or so.
Stick with a 4" stroke for all your stock block strokers IMO....they are cheaper and easier to build as well (less windage tray clearance issues, etc.).
Hope this helps!
-Tony
A stock LS3 block has a short sleeve.....about 5.500 long.
Even a 4" stroke pulls the piston out of the bore more than you would like but there are many out there and they seem to have a decent track record for solid long term reliability....pulling it out the hole another 1/8" IMO is the potential straw that breaks the camels back giving you long term piston rock issues and faster bore and skirt wear.
It wont make any more power.....the heads and induction dictate that.....a few more ft/lbs of torque but at the expense of what I just mentioned.
A Darton sleeved block on the other hand is 5.700 - 5.750 in length.....that means you can run a 4.125 stoke in that block and have less wear and tear than a stock block with a 4" stroke.....in fact the piston is further up the bore by an additional 1/8" or so.
Stick with a 4" stroke for all your stock block strokers IMO....they are cheaper and easier to build as well (less windage tray clearance issues, etc.).
Hope this helps!
-Tony
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Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
www.mamomotorsports.com
Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
Thread Starter
Staging Lane
Joined: Jul 2012
Posts: 57
Likes: 1
From: Callaway FL.
Guys
A stock LS3 block has a short sleeve.....about 5.500 long.
Even a 4" stroke pulls the piston out of the bore more than you would like but there are many out there and they seem to have a decent track record for solid long term reliability....pulling it out the hole another 1/8" IMO is the potential straw that breaks the camels back giving you long term piston rock issues and faster bore and skirt wear.
It wont make any more power.....the heads and induction dictate that.....a few more ft/lbs of torque but at the expense of what I just mentioned.
A Darton sleeved block on the other hand is 5.700 - 5.750 in length.....that means you can run a 4.125 stoke in that block and have less wear and tear than a stock block with a 4" stroke.....in fact the piston is further up the bore by an additional 1/8" or so.
Stick with a 4" stroke for all your stock block strokers IMO....they are cheaper and easier to build as well (less windage tray clearance issues, etc.).
Hope this helps!
-Tony
A stock LS3 block has a short sleeve.....about 5.500 long.
Even a 4" stroke pulls the piston out of the bore more than you would like but there are many out there and they seem to have a decent track record for solid long term reliability....pulling it out the hole another 1/8" IMO is the potential straw that breaks the camels back giving you long term piston rock issues and faster bore and skirt wear.
It wont make any more power.....the heads and induction dictate that.....a few more ft/lbs of torque but at the expense of what I just mentioned.
A Darton sleeved block on the other hand is 5.700 - 5.750 in length.....that means you can run a 4.125 stoke in that block and have less wear and tear than a stock block with a 4" stroke.....in fact the piston is further up the bore by an additional 1/8" or so.
Stick with a 4" stroke for all your stock block strokers IMO....they are cheaper and easier to build as well (less windage tray clearance issues, etc.).
Hope this helps!
-Tony
More RPM doesn't always make more power if the torque isn't there.
TECH Junkie
Joined: Dec 2005
Posts: 3,092
Likes: 11
My ls3 based 427 was on the dyno this week for tuning and I can say I have no blowby. Also the oil consumption during the break in period has been low. I have JE asymmetrical pistons and rings.
I also have a friend with virtually the same motor but has Wiesco pistons. He had some pretty good blowby and had the rear main seal blown out. He had to do some serious venting of his motor.
Here is a link explaining the JE asymmetrical pistons.
http://www.jepistons.com/Articles/10...d-Pistons.aspx
I also have a friend with virtually the same motor but has Wiesco pistons. He had some pretty good blowby and had the rear main seal blown out. He had to do some serious venting of his motor.
Here is a link explaining the JE asymmetrical pistons.
http://www.jepistons.com/Articles/10...d-Pistons.aspx
