Why #7?
TECH Fanatic
Joined: Oct 2011
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I do plan to run it in the future when I get around to forging this one and going crazy on the boost.
Teching In
Joined: Mar 2012
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I could swear my engine has this thing already because I took it apart and put it back together, are you guys saying that the tubes are too small or are not functional in the rear?
I run the kurt urban kit. Its a nice setup. The rear of the cylinders should always be vented it. I dont care what your setup is. If you run it hard they should be vented. SLPfirehawk you probly have the stock ls1 lines they vent the rear but wont fit under a fast intake and just grind down the ribs on the ls6 intake to fit. But I put the fast on so I went with the KUP system.
Teching In
Joined: Mar 2012
Posts: 42
Likes: 0
I run the kurt urban kit. Its a nice setup. The rear of the cylinders should always be vented it. I dont care what your setup is. If you run it hard they should be vented. SLPfirehawk you probly have the stock ls1 lines they vent the rear but wont fit under a fast intake and just grind down the ribs on the ls6 intake to fit. But I put the fast on so I went with the KUP system.
As it's been explained to me, it's a heat related issue with #7. Not sure exactly why, but #7 piston and chamber get hotter than the rest. This causes issues with the factory rings and ring lands on the pistons. Horsepower is heat, so at a stock level, running stock programming that puts the AFR in the mid to low 12s, it's not an issue.
But bump up compression, bump up horsepower, lean it out a little bit and the temperatures in the cylinder start to rise, as does the cylinder pressure (isn't that what torque is directly related to, cylinder pressure?).
In 2001, all of the f-bodies and corvettes had the ls6 intake, and the rear steam vents were closed.
A wise man told me, keep the cylinder heat under control, and you'll keep the motor together.
But bump up compression, bump up horsepower, lean it out a little bit and the temperatures in the cylinder start to rise, as does the cylinder pressure (isn't that what torque is directly related to, cylinder pressure?).
In 2001, all of the f-bodies and corvettes had the ls6 intake, and the rear steam vents were closed.
A wise man told me, keep the cylinder heat under control, and you'll keep the motor together.
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Very inciteful thread. My car is in the shop getting a rebuild because of the dreaded #7 ringland failure. 2002 SS -- stock bottom end + heads/cam/Fast 92/spray.
So I presume that the rear vents are covered on my car (2002). If that's the case, am I crazy to go back with the same setup (FAST intake, etc.) and NOT do something different with the rear vents?
So I presume that the rear vents are covered on my car (2002). If that's the case, am I crazy to go back with the same setup (FAST intake, etc.) and NOT do something different with the rear vents?
That is trick as hell! Very nice idea and fabrication1 Wouldn't be too hard either as long as you know how to tap, and do tubing bending and flaring.
Very inciteful thread. My car is in the shop getting a rebuild because of the dreaded #7 ringland failure. 2002 SS -- stock bottom end + heads/cam/Fast 92/spray.
So I presume that the rear vents are covered on my car (2002). If that's the case, am I crazy to go back with the same setup (FAST intake, etc.) and NOT do something different with the rear vents?
So I presume that the rear vents are covered on my car (2002). If that's the case, am I crazy to go back with the same setup (FAST intake, etc.) and NOT do something different with the rear vents?
I was wondering about that. I have a '98 with the stock coolant setup and an LS6 intake with the bottom dremelled out. I take it I should be ok then?
I melted cyl 7 on 2 forged ls1 engines. No steam vent hooked up. I ended up getting a pre 2000 vent tube and shaVing down the bottom of my ls6 intake to make it fit. No real need to spend any money on a kit, the factory one works fine
Exactly what I did upon installing my LS6 intake on my 2000. I maintained the factory vent tube by modifying the bottom of the LS6 intake.