Carbon buildup after 117k, pictures - Page 3

KingLT1 · 05-02-2018, 02:01 PM

Quote:

Originally Posted by JaxChris

It proves that the catch can is not needed on the GM Gen V. Your runners won't be any cleaner than that after 100k unless you vent to atmosphere.

While a catch can may not be required it does catch oil that makes it's way back into the intake manifold and heads. I don't know about you, but the only thing I want in my combustion Chambers is air, fuel, and spark.

Gunmetalmissle · 05-02-2018, 02:08 PM

Quote:

Originally Posted by GuywithL86

guy is providing me with more info, confirmed he used 0w-20

So basically what we have here is the worst possible conditions for carbon buildup.

-Long intervals between oil changes (9-12k)
-No catch can
-over 100k miles
-0w-20 oil, aka super thin, which undoubtedly allows more oil into the intake since there are numerous records of the truck motors burning it through the intake via AFM

extreme carbon buildup theory circulating all GM DI v8 forums = pretty much busted (we'll of course need more high mileage examples to make it 100%)

Thank you 00pooterSS of performancetrucks

I agree it is worse case other than the fact that he used full synthetic dexos approved oil.

6spdhyperblue · 05-02-2018, 02:09 PM

Quote:

Originally Posted by JaxChris

It proves that the catch can is not needed on the GM Gen V. Your runners won't be any cleaner than that after 100k unless you vent to atmosphere.

Right? You can lead a horse to water...

Quote:

Originally Posted by KingLT1

While a catch can may not be required it does catch oil that makes it's way back into the intake manifold and heads. I don't know about you, but the only thing I want in my combustion Chambers is air, fuel, and spark.

That’s a different story tho. Not diluting the intake charge is a legitiment reason to run one. Especially if you’re tuned. That’s when I’ll buy one.

KingLT1 · 05-02-2018, 02:32 PM

That is precisely why I bought one.

*Mr. Wyndham* · 05-02-2018, 02:58 PM

All great stuff in here. I actually like this thread better than most I've read in the past month. Learning stuff!

Spartan268 · 05-02-2018, 03:28 PM

Quote:

Originally Posted by GuywithL86

guy is providing me with more info, confirmed he used 0w-20

So basically what we have here is the worst possible conditions for carbon buildup.

-Long intervals between oil changes (9-12k)
-No catch can
-over 100k miles
-0w-20 oil, aka super thin, which undoubtedly allows more oil into the intake since there are numerous records of the truck motors burning it through the intake via AFM

extreme carbon buildup theory circulating all GM DI v8 forums = pretty much busted (we'll of course need more high mileage examples to make it 100%)

Thank you 00pooterSS of performancetrucks

I'm so glad for this. Hopefully we can see some high mileage camaros soon. Gives a lot more peace of mind considering the coking and A8 is the two things that makes me iffy on keeping this vehicle long term.

Quote:

Originally Posted by JaxChris

It proves that the catch can is not needed on the GM Gen V. Your runners won't be any cleaner than that after 100k unless you vent to atmosphere.

I'm not running one so even better. But careful what you say. I'm surprised a certain vendor hasn't chimed in yet

cmitchell17 · 05-02-2018, 06:20 PM

So if the SAE paper cites that they found that the significant portion of carbon buildup on the valves and intake came from the exhaust gas, then I wonder what eliminating the EGR effect in the cam timing will do over the long run.

Since you can tune out the EGR over retard at light loads, this maybe will eliminate a lot of that?

JFM-jr · 05-03-2018, 05:52 AM

Everytime I dump oil out of my catch can I will remind myself to read this thread again.

parbreak · 05-03-2018, 07:41 AM

Quote:

Originally Posted by JFM-jr

Everytime I dump oil out of my catch can I will remind myself to read this thread again.

GuywithL86 · 05-04-2018, 10:39 AM

Quote:

Originally Posted by JFM-jr

Everytime I dump oil out of my catch can I will remind myself to read this thread again.

to remind you how much of a waste of time it is?

S2K+1LE · 05-08-2018, 04:58 PM

Looks like a BMW or VW after 12K miles

Mavericka70 · 05-08-2018, 05:17 PM

14k on my lt1, had it apart for a cam swap. 5k between oil changes, 5w30, no mods until now.

GuywithL86 · 05-09-2018, 12:08 PM

Quote:

Originally Posted by Mavericka70

14k on my lt1, had it apart for a cam swap. 5k between oil changes, 5w30, no mods until now.

looks pretty much identical to the one with 117k, interesting

Gunmetalmissle · 05-09-2018, 12:22 PM

Quote:

Originally Posted by Mavericka70

14k on my lt1, had it apart for a cam swap. 5k between oil changes, 5w30, no mods until now.

Synthetic oil?

05-02-2018, 02:32 PM	#32
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,643	That is precisely why I bought one. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

05-02-2018, 02:58 PM	#33
Mr. Wyndham I used to be Dragoneye... Drives: 2018 ZL1 1LE Join Date: Jan 2007 Location: Buffalo, NY Posts: 31,873 View My Garage	All great stuff in here. I actually like this thread better than most I've read in the past month. Learning stuff! __________________ *"Keep the faith."* - Fbodfather

05-03-2018, 05:52 AM	#36
JFM-jr Drives: 2016 Camaro 2SS Join Date: Mar 2016 Location: Suffolk Long Island Posts: 954	Everytime I dump oil out of my catch can I will remind myself to read this thread again. __________________ 2016 Hyper Blue 2SS A8,NPP,Moonroof Pray ported factory intake manifold Ported TB Rotofab ARH 1 7/8 longtubes hi flow cats AFM deleted E85 11.0@124.9 11.65@118.8 pump gas,stock tune/exhaust New combo: Pray Performance Heads/cam MSD intake manifold and Circle D 3C 554/491 on E85 all work & tuning done by Pray

05-08-2018, 05:17 PM	#40
Mavericka70 Drives: '17 1ss m6 Join Date: May 2018 Location: Arkansas Posts: 17	14k on my lt1, had it apart for a cam swap. 5k between oil changes, 5w30, no mods until now. Attached Images

05-02-2018, 06:20 PM	#35
cmitchell17 Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016 Location: US Posts: 1,213	So if the SAE paper cites that they found that the significant portion of carbon buildup on the valves and intake came from the exhaust gas, then I wonder what eliminating the EGR effect in the cam timing will do over the long run. Since you can tune out the EGR over retard at light loads, this maybe will eliminate a lot of that?

05-08-2018, 04:58 PM	#39
S2K+1LE Account Suspended Drives: 17 SS 1LE \| 07 S2K Join Date: Sep 2017 Location: Arizona Posts: 375	Looks like a BMW or VW after 12K miles

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