Wicked69

Would you say this is more so on pump gas (91)? I'm running E85 and no intercooler but conservative timing, water injection, and a colder plug. When I do an all out pass I just pull the #5, 7 and tune from there.

I do plan to run it in the future when I get around to forging this one and going crazy on the boost.

slpfirehawk415

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?

Zmg00camaross

iTrader: (11)

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.

slpfirehawk415

Yes mine is the stock one. Im confused now though. It sounds like your saying that everyboyd who broke ringland #7 broke it because they got an intake and blocked off the vents in the rear, but that couldn't possibly be true, right? I mean the vents are obviously and integral part of the cars engineering, everybody wouldn't just go blocking them off like that right? Can somebody clarify this for me?

The Alchemist

iTrader: (19)

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.

Zmg00camaross

iTrader: (11)

I agree with all that ^^ Stock engines and such will be fine. But when you start adding power they should be vented.

slpfirehawk415

so then the 98-99 have a vented front and rear but the later models have only a vented front?

Y2KFirehawk

iTrader: (12)

98 through 2000 are vented front and rear but do not come with LS6 intakes. 2001-2002 cars came with LS6 intakes but plugged rear vents.

Midnight02

iTrader: (8)

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?

91sonomast

It appears as though you are, the KUP kit is only $200

93camaro_zzz

iTrader: (13)

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.

Zmg00camaross

iTrader: (11)

Yes vent it. And you are spraying, That cylinder is all ready hotter and when you spray that cylinder is more prone to denotation.

Midnight02

iTrader: (8)

Thanks! At $200 for the kit (and the cars already in the shop for the rebuild) I don't see much downside to doing it.

Adam86

iTrader: (10)

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?

Zmg00camaross

iTrader: (11)

but of course, If you want to go cheaper then you can get another front cross over and run a line from that and use a t fitting into the front one. But the kit is nice and sure looks good.

30th t/a

iTrader: (51)

what is the benefits with the KUP kit over just running the 98-00 setup?
You could notch out the bottom of the LS6 intake and spend alot less for the 98-00 coolant lines.

LS14EVR

iTrader: (3)

Glad I brought this up. Great discussion going on here. Looks like if I do any more mods, I'll be venting the rear of my 02.

SPRAYED 01

iTrader: (22)

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

BAD ASS TA WS6

iTrader: (5)

Where does the braided line on the above pictured setup run to off of that steam port distribution block?

Y2KFirehawk

iTrader: (12)

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.