11-05-2019, 12:16 AM | #23 |
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They are on ebay! Just type in insane performance crank hub and it’ll pop up.
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11-05-2019, 02:07 AM | #24 |
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They are based in Baltics, Lithuania and they have a lot of experience in vehicle tuning:
https://www.facebook.com/insane.lithuania/ https://www.1nsane.lt/kontaktai I messaged them and guys came back within 20 minutes, after working hours. |
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11-05-2019, 04:46 AM | #25 | |
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I'm not a keyboard jockey like most here. I've been fixing BMW issues starting with the S52, then S54, and now S55. I'm sure stating that Insane Performance's timing chain sprocket is fine and will make you sleep better since you already have one installed. I'm good with that, but I don't want other people to make uninformed decisions. If people are good with the risk, please proceed to purchase it. It looks like the machining quality is good. It appears they properly plunge grind the front crank seal area to maximize seal life. Last edited by M3 Muscle; 11-05-2019 at 04:53 AM.. |
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11-05-2019, 05:51 AM | #26 | |
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I very much appreciate your posts and level of science behind it. I think it is very important actually to compare hubs side by side as pictures might not tell full story. In some pics I see that IP crank hub has sprocket teeth tapering towards top, in some pics its hard to tell.
They claim that the hub has been running on test car for 50 000 kms and many more on high-powered client cars. But of course proof is in the pudding e.g. if and when first failure manifests itself or someone independent will analyse the part in detail. They mentioned to me that they are going to look into details of teeth angling in future iterations as well. Quote:
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11-05-2019, 08:56 AM | #27 | |
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11-05-2019, 12:55 PM | #28 | |
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I did Insane back in April/May when MPSI was on b/o. I've put hard miles on the car and taken it to the track 7-8 times. Another local guy is running turbos and 750+ with the insane hub, and he tracks his car just as much as me and races way more. Its taken a beating in both cars. You're good. Also, they sell the Insane hub on bm3tuning.
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11-05-2019, 04:27 PM | #29 | |
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11-05-2019, 08:55 PM | #30 |
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Well, with the only Stock motor S55 in the 9's on the planet runs VTT GC's, and Spline lock, so I'd say there is evidence that it is, actually, a real fix.
In fact, if you have doubts do a few google searches on using pins or splines to transfer TQ -as I have stated before, that's all the crank hub is doing; transferring TQ from the crank to the cams and oil pump. We keep them in stock and we back them with a no-slip guarantee if installed by us or a certified installer. You cannot go wrong from a performance or price point perspective. Chris |
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11-05-2019, 09:38 PM | #31 | |
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11-05-2019, 09:57 PM | #33 |
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nothing is a true fix to anything...unless you dragging your car pushing 500+hp or running on hydrogen() the crank hub fix is simply nuts because it doesn't occur much. if it does slip and you take it to the shop immediately you'll pay maybe 1k more than the fix.
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11-05-2019, 10:29 PM | #34 | |
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There were several people who had the VTT hub slip, and they blame it on not having the CBC along with the hub.
How many people run the MAX Psi hub without any kind of crank bolt capture? TONS of them, I know of several personally. Thats why I say its not a solution.
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11-06-2019, 01:57 AM | #36 |
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11-06-2019, 04:46 AM | #37 |
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11-06-2019, 05:51 AM | #38 | |
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As for the Gintani, the one piece is cool, but not needed and adds considerable costs. It looks like they compromised on sprocket shape to allow machining to be done as one piece. Based on the black color, I'm guessing they are doing a nitride salt bath coating (also called a QPQ). This help get some extra hardness in the sprockets for wear, but the process only adds a hardness to a depth of ~.001". For comparison, the stock sprockets are induction hardened. I haven't cut them open to inspect the case hardening depth, but I suspect it is ~.005"+. I like the concept of how they are locking the hub into the crank, but I'd like to see a lock on on each side (0* and 180*). I like this method because you should be able to leave the radiator on the car during the swap thus saving money on labor, but I haven't seen their instructions. It also allows for a higher yield steel to be used to increase the shear value. On the Vargas hub, the concept is interesting, but I've seen lots of interference fits like this fail on other applications with cyclical loading. The splines are inside the crank which is the area with the smallest radius, thus their load will be greater that if placed on the OD of the crank (I understand this isn't realistic due to the shape of the crank nose). Their use of a 17-4 precipitate hardened stainless steel throws me for a loop, but I have to assume they are using it for the toughness to resist cracking in the high stress geometry of the spline lock area. 17-4 PH SS is not terribly hard and does not wear well when compared to a heat treated medium carbon steel. I work with a lot of industrial applications that have moving parts and the 17-4 is always the first to wear. We have tried different heat treatments all the way down to H900 as well as some custom treatments and the 17-4 always wears before standard carbon steels. I think over time, the chain will wear down the sprocket (probably never become catastrophic). If someone has this and does oil analysis, it would be interesting to see if it shows any increased nickel from the 17-4 PH to confirm to deny this. It might be 100% fine, but I'd have to pass due to both the 17-4 PH base metal and the spline lock method. The Insane Performance hub has sub par sprocket geometry. It doesn't have any surface hardening for the sprocket. It uses an odd grade of Russian steel (odd based on what we use in the US) from what they have released. As best I can tell, it correlates to a 5140 steel. Again, with what we have access to in the US, it just seems odd. These are just my engineering opinions combined with 25+ years of turning wrenches and 15 years working in an industry that sees a lot of bad designs and failures. Do your own homework and make the decision you feel good with. To your original question, I were to buy one today, I'd wait until Maximum PSI had more back in stock. If I were wanting a no compromise solution, I'd wait as I'm sure there will be more on the market soon. Last edited by M3 Muscle; 11-06-2019 at 06:01 AM.. |
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11-06-2019, 08:05 AM | #39 | |
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Are you in the s55 WhatsApp chat?
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11-06-2019, 08:52 AM | #40 | |
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11-06-2019, 09:01 AM | #41 | |
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11-06-2019, 09:37 AM | #42 |
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LMAO yep! I was the one that was added a couple of days ago and was asking about the insane hub.
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11-06-2019, 09:48 AM | #43 | ||
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11-06-2019, 10:22 AM | #44 |
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I just left, it was so much to keep up with lol. Good guys in there.
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