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anyone know why theres notches on the center piece? Just wondering if its something to be concerned about.
*****Well, there's no vanes or blades missing so that's a plus! The housing does not seem scored from excessive shaft end play, or a worn journal bearing. You can always measure shaft endplay and other typical field checks with a dial indicator if you like. Here is a pic of a non-stock turbo, newly built and not installed yet, for our cars.. (C63s). The notches may be for a special proprietary tool to be able to remove the shaft end bolt for disassembling the turbo for rebuilding, or a stake to prevent the bolt from loosening at 40k rpm when those vanes are spitting out 17psi or more of boost, etc.. Really bad things happen when a turbo shaft lets loose or those vanes touch the housing at a very very high rpm, far above the engine RPM.
I agree, the look fine visually. The little notches from the nuts may be from metal removed during the high speed balancing process. It you look at aftermarket turbos or modded factory stock frame turbos, you’ll often see part of the nut ground off for balancing.
*****Well, there's no vanes or blades missing so that's a plus! The housing does not seem scored from excessive shaft end play, or a worn journal bearing. You can always measure shaft endplay and other typical field checks with a dial indicator if you like. Here is a pic of a non-stock turbo, newly built and not installed yet, for our cars.. (C63s). The notches may be for a special proprietary tool to be able to remove the shaft end bolt for disassembling the turbo for rebuilding, or a stake to prevent the bolt from loosening at 40k rpm when those vanes are spitting out 17psi or more of boost, etc.. Really bad things happen when a turbo shaft lets loose or those vanes touch the housing at a very very high rpm, far above the engine RPM.
I appreciate the response, will keep an eye on it.
Originally Posted by topgearbryan
I agree, the look fine visually. The little notches from the nuts may be from metal removed during the high speed balancing process. It you look at aftermarket turbos or modded factory stock frame turbos, you’ll often see part of the nut ground off for balancing.
Gotcha
Originally Posted by Jimmy_c63s
They look spotless man, the housing isnt scorned at all either.
You a bit concerned about them?
Kinda, Zac Motorsports said I needed their $800 catch can for the black oil/carbon buildup going into the turbos. I give the turbos a wipe down every time I take off the intakes.
pretty much...when I took off my stock intakes for the first time, I didn't have any buildup inside.
*****I have catch cans on other platforms. They work well for certain applications and can keep things like the intercooler and other associated hardware from getting oil mist all over the inside which can somewhat reduce their efficiency - but again, different car and different engineering with ONE monster turbo running stupid high boost in basically a race car... The catch can has to be emptied every few hours of running, especially at the track. Normal city driving is fine... Pic below. Vented multiple catch cans, etc.. Stage II GN, about 800hp, methanol injected.
That being said, my C63s has low miles, stock turbos, and the inside of the housing areas look spotless. Perhaps higher mileage cars or ones with turbos weeping a bit of oil past the seals might benefit, but our cars seem like a pretty clean setup.
Kinda, Zac Motorsports said I needed their $800 catch can for the black oil/carbon buildup going into the turbos. I give the turbos a wipe down every time I take off the intakes.
That's a bit sus they said you need their catch can for your stock turbos. Where's all this oil and carbon build up coming from? Their zac intake? 🤔
oil comes from the crankcase when it is pressurized under boost. On other platforms one side is usually low pressure and the other side is high pressure requiring a catch can. What’s ****ty is it’s all epa and emissions related trying to recirculate gasses. Adding boost to an engine usually pressurizes both sides and causes oil back pressure and seepage which can cause misfires when fed to turbos or through intakes. There’s usually a one way egr valve to prevent this but adding boost changes things. I’m not positive how the M177 behaves as it comes with twin turbos from the box. I did boost a 5.0 coyote engine and it required catch cans. I had to empty them every 1-2k miles and they would have a few tablespoons of oil. On this engine I don’t have misfires and do not notice a significant amount of oil in the intakes 🤷♂️. Probably a good insurance policy but not necessary.
pics of coyote engine, 800+whp. Catch cans on both right and left sides of the engine one recirculated back into the intake. NA required only one on the passenger side.
Last edited by domjansson; May 19, 2022 at 07:36 PM.
pretty much...when I took off my stock intakes for the first time, I didn't have any buildup inside.
See dodgy af..... funny how they don't even list this as a requirement on their site/ads but now they tell you to buy their $800 catch can for their intake causing carbon build up? Would have been great if they told you this before buying!!!
Knew there was something off about them from the start with their unknown ZAC company insignia plastered all over their products..... 🤮🤮🤮
Bin/sell the intake and get something else if possible. If not just whack on the stock intake for now until u find a better intake bro.......
See dodgy af..... funny how they don't even list this as a requirement on their site/ads but now they tell you to buy their $800 catch can for their intake causing carbon build up? Would have been great if they told you this before buying!!!
Knew there was something off about them from the start with their unknown ZAC company insignia plastered all over their products..... 🤮🤮🤮
Bin/sell the intake and get something else if possible. If not just whack on the stock intake for now until u find a better intake bro.......
go figure I'm going to put the stock intakes back on to see if it works better with my ecu tune and blowoff valves.
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The housing does not seem scored from excessive shaft end play, or a worn journal bearing. You can always measure shaft endplay and other typical field checks with a dial indicator if you like. Here is a pic of a non-stock turbo, newly built and not installed yet, for our cars.. (C63s). The notches may be for a special proprietary tool to be able to remove the shaft end bolt for disassembling the turbo for rebuilding, or a stake to prevent the bolt from loosening at 40k rpm when those vanes are spitting out 17psi or more of boost, etc.. Really bad things happen when a turbo shaft lets loose or those vanes touch the housing at a very very high rpm, far above the engine RPM.
I'm going to put the stock intakes back on to see if it works better with my ecu tune and blowoff valves.
