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08-01-2018, 10:30 PM | #67 | ||||
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08-02-2018, 07:12 AM | #68 | |
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If you want a piston I'm sure it can be arranged. No LS7 in here. Very happy with the S65 despite this set back. |
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08-02-2018, 07:22 AM | #69 |
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Sorry if I missed it, but how did you (or the mechanic) see that the cat is clogged? Is it easy to notice, or does it require some test to prove it?
I have the same x-pipe, so far it's catless, but I intend to put some high flow cats to deal with the smell. I don't track my car so often though. This is so sad man, a whole engine blown because of some stupid exhaust...
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08-02-2018, 07:50 AM | #70 | |
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This xpipe places the HFCs in the primary cat position to try to get the car to pass emissions. You'll notice most other HFC xpipes place the cats where the OEM xpipe has its secondary cats, thereby removing lots of the heat they see. If you're going to weld HFCs in I suggest you do it in the secondary position. That said, most people are just fine with HFCs in a tracked M3. This car sees a very specific use which is not conducive to cat survival |
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08-02-2018, 08:21 AM | #71 | |
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If you're really set on keeping the block, send it up. If there's no holes, it may be salvageable. |
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SYT_Shadow11479.50 admranger2984.50 |
08-02-2018, 09:38 AM | #72 |
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Ugh! Just found this thread today. So sorry man. This is a true bummer but hang in there and keep us updated
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08-02-2018, 11:22 AM | #73 |
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As far as the brand of cat, they're whatever was in the ESS HFC Xpipe
Whatever it was, it took the equivalent of 5 years of tracking. So I don't fault them. The cats did not melt. One of them 'broke/crumbled'. The other is perfect
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08-02-2018, 02:50 PM | #74 |
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Sorry to hear man. Sucks booboo. interested in your further investigations though! youll be back.
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08-02-2018, 03:03 PM | #75 |
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I do wonder if ESS position of cats significantly heat them more than other pipes with hfc in the secondary position. But thank you and I removed all cats today so we all really really appreciate this info and if there is anything the forum or myself can do just let us know.
I also concur that it is really really hard to find good shops. Even supposed dedicated BMW shops. Its forces me to learn a lot and I've finally found a good one but it's sad isn't it? |
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08-02-2018, 03:15 PM | #76 | |
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Other xpipes place them much further downstream, protecting them but also acting less like cats as they see less heat so they're less efficient. It's a tradeoff. I assume if the cats were in the secondary position they would have probably lasted forever, but bear in mind this car is tracked heavily and they lasted a pretty decent amount of time. As soon as your issue isn't replacing one part for another one you find shops run out of answers. Fortunately the third time was the charm and these guys have in depth knowledge of S65s |
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08-02-2018, 03:44 PM | #77 |
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Maintaining readiness with primary location makes a lot of sense if one wants to pass emissions but from your account it seems maintaining a hfc in primary for track duty may not be the best. Sounds like track duty needs secondary hfc or just fully catkess? Makes sense now that you have posted your story but who the heck knows until shit happens.
I'm so sorry this happened again. |
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08-02-2018, 04:30 PM | #78 |
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Sorry about your engine. I was told by my trusted mechanic a while ago not to track s65 with cats.
We installed Gintani catless exhaust long before we installed the blower.
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08-02-2018, 04:31 PM | #79 | |
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Track pipes would have likely fared much better than what I did, but at the time I bought the xpipe I was very interested in readiness and did not intend to track that intensively. Well, lesson learned and hopefully others will learn from it |
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08-02-2018, 06:25 PM | #80 |
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About the cat brand in this x-pipe, all the sizing seems to be identical to the magnaflow cats, the cpsi as well. Given they charge only $100 more for hfc over resonators, I assume you are not getting any premium brand cats.
My guess is that they use magnaflow, however when I asked ESS they denied it. SYT_Shadow are you planning on reusing the front pipes from your ess xpipe?
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08-02-2018, 06:38 PM | #81 | |
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It would already be on the E92 but last weekend the steering rack suddenly died... so it's also getting replaced. Sometimes when it rains it pours |
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08-03-2018, 06:46 AM | #85 | |
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You get all codes of codes when interesting things are happening. Motor Emergency program, idle control valve, misfires, etc. When I was actually using the car I didn't have CELs. Whenever I had one we'd stop and try to diagnose and throw parts at it |
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08-03-2018, 10:07 AM | #86 |
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Just speculating here, but the pumping losses would increase significantly if the cat was clogged enough to blow out the valve stems, then that would translate into increased force at an awkward timing on the crank, and it would only be on some cylinders, thereby causing an imbalance that could eventually ruin a bearing(s).
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08-03-2018, 11:42 AM | #87 |
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I would think you noticed her down on power no? Not in anyway that would help with diagnosis but out of pure curiosity looking back was just wondering?
Must have been lighting up a million codes! Guessing the thing would alternate from super lean to super rich in response to lean if things would sometimes flow and other times not get past the cats. Would be chasing dam tail around. Were they ceramic cats? Imagine so if they crumbled. In my view I can almost assure ess ouy a cheap cat in knowing some background on ess. Not that it wasnt driven really hard but still its bothersome |
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08-03-2018, 11:57 AM | #88 | |
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Additionally, at times the entire bank 1 was misfiring... the crank probably had a party |
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