[toohighpsi]

Anything is possible...

We failed the front seal on our Camaro at LS fest west last year, replaced the seal, fixed the breather issue (bigger hose and fittings) then ran the car at the same boost level for the remainder of the year - Hot Rod Power tour, LS Fest East, and all of the Redlist events.

Pulled the motor apart at the end of the season when we went to the 416 and it looked perfect. Anytime an engine is boosted, the crankcase ventilation requirement increases. The Camaro breather tube connecting from the oil separator to the Inlet elbow is too small for high boost levels and the seal is flat out junk - fortunately it lets go easy - an early indicator that you are:

Lacking Proper Crankcase Ventilation
-or-
Knocking
-or-
Both

Either way, if you fail a seal in a boosted application you need to determine the cause and make corrections. I know that Greg is not out of fuel, he's also running MS 109 fuel which is some pretty good stuff along with 1000cc/min of water/meth keeping things cool and working to prevent knock.

One thing for sure, we'll know shortly!

[oldman]

Originally Posted by parish8

You can see the hoses in this pic. I still have a stock LT front crank seal and have been up to 16psi with my built motor. Probably in the 900+hp range. I planed on changing to the ls3 seal but they sent me the wrong seal so I just went with the stock one.

amen

[toohighpsi]

This is the tube that causes the crankcase problems at high boost. Found this picture on another post but it nicely shows that small hard plastic line that causes the restriction.

Parish - you removed this line when added the procharger, they just vent to atmosphere which is fine except when you are selling a CARB legal kit.
PS Parish - love the new build - looking forward to seeing that finished

[laynlo15]

Parish has twin turbo.

[scooter k]

I have aftermarket valve covers with -6an to the oil separator with an elite engineering catch can on the blower side. Those are also -6. I don't really have anymore room in my intake so was thinking of running a hose with a breather filter off the oil separator filtered air nipple. I have a 90 degree plastic fitting but it will only accept a 5/8" hose. Would that be sufficient or do I need to upgrade my valve covers to a larger hose too? I'm in the tuning process now so can tune for that unmetered air.

[Elite Engineering]

Do a leak down test. The others prior that have mentioned a breach in the piston/ring/cylinder wall seal are on the right track. We see engines all the time make great power but experience excessive pressure.


Next, or E2-X Ultra system pulls suction at all times on the crankcase eliminating these issues while preventing up to 95% of all oil mist and other contaminants from entering the intake air charge.


Let us know if you need more details.

[laynlo15]

Elite, thanks for your input and I'll take that under consideration

[Turbo_RORO]

Originally Posted by parish8

You can see the hoses in this pic. I still have a stock LT front crank seal and have been up to 16psi with my built motor. Probably in the 900+hp range. I planed on changing to the ls3 seal but they sent me the wrong seal so I just went with the stock one.

Same here, same power and boost. I have vented both valve covers, oil pan, valley cover. Never had an issue. But I will replace with the LS3 when I swap my cam. Maybe sooner when I turn up the boost.

[laynlo15]

I'm gonna find out next weekend if that's the only issue

[parish8]

You probably know this but I didn’t. If you hit the crank bolt with a little heat it comes right out with an impact. Like 30 seconds with a burnzomatic is all it takes.

[toohighpsi]

Originally Posted by laynlo15

Parish has twin turbo.

Yup, but for some reason I though he started with a procharger first... sorry about that Parish!

[crash0117]

I had the same thing happen at the 16-17 psi range on the Dyno. I also blew one of the sensors out in the valley cover. Replaced the crank seal with an ls and bought a katech valley cover with dod delete. Also added -8 breather lines to my valley covers with an additional catch can to go with my Elite. Turned the boost up to 19 and have been fine ever since. Making 900hp on motor and blower and 1150 with spray.

[ProCharger]

Just to be "that guy"

But I have seen a few that just had the front seal fail, and nothing more.
The guys replaced the seals, and haven't had issues since.

(1 did a LS seal, the other went back stock LT)

[DWR]

Originally Posted by Turbo_RORO

Same here, same power and boost. I have vented both valve covers, oil pan, valley cover. Never had an issue. But I will replace with the LS3 when I swap my cam. Maybe sooner when I turn up the boost.

Hold up, Are you telling us that you are running around 900hp with stock internals on an LT1?!? If that's true it gives me a lot more confidence in these motors/ really makes me think the real "issue" is the crank seal/venting and piston ring gaps. I was already pretty confident that the piston ring gap was the true cause behind people popping ringlands... There are a ton of guys over at performancetrucks.net that have been running up to 1000hp on stock blocks/internals (well maybe spings and cam) once they filed down the rings a bit. Though those guys were the LS based motors when a 4.8 v8 can push 1000hp on stock internals once the rings are filed/ their cave point was around 600hp as well (prior to filing the rings).... Just makes me think....