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11-20-2017, 06:15 AM | #1 |
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Anyone had failures with Harrop's SC kit?
Hi team, I'm leaning really hard on getting one of these and am wondering if anyone knows of failures, and if so, what?
I'm guessing a rod, rod bearing, or mains, but want to hear from any first handers. P.S. I know bearings in these cars go even without superchargers but whatever, share away. |
11-20-2017, 07:01 AM | #2 |
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Unfortunately, in general failures of any kit are hidden behind non disclosure agreements or directly removed from the forum when the vendor is a sponsor.
Then you have the fanboys which got a deal in exchange for their unwavering support. It's pretty hard to determine the truth nowadays Personally I have not heard of any failures of this kit that was swept under the rug. |
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11-20-2017, 07:39 AM | #3 | ||
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11-20-2017, 06:07 PM | #4 |
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Supercharger kits are essentially the same, they provide a compressed source of air to the engine. They will have their subtle differences but ultimately the tune will be the biggest factor in long term reliability of the S65. As far as the kit goes, I haven't read of any kits that failed due to design error. They all seem to be as reliable as the next one. Components can fail at any time though as you are introducing boost into a high revving race engine stuffed into a street car.
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11-20-2017, 06:28 PM | #5 | |
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11-20-2017, 08:58 PM | #6 | |
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Drives: G81 M3 Touring, GR Supra GTS
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One good point about the Harrop kit is that the belt is in line with the stock belts.
This is what I was told about other kits Quote:
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11-20-2017, 10:11 PM | #7 |
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I've had the Harrop SC on my car for over 3 years, with over 27,000km on it. For me there has only been some minor issues, like initially one of the hoses was too short for my car (fixed with a samco) and that at one point the butterfly was stuck open after a track day (re-aligned the butterfly). Both of these issues in my POV was a QC/shipping issue with Harrop being in Australia and me being in Hong Kong. I'm sure these minor issues has been fixed now because no one else has had them.
I have an oil change every 6 months or 5000km, whichever comes first, with 9 litres of 10w60 oil. No issues whatsoever.
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11-21-2017, 09:47 AM | #8 | |
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In terms of reliability, one can make the argument that the low end torque produced by the Harrop kit is more detrimental to the engine's health than the added load on the main bearings from a centri kit. I would expect accelerated rod bearing wear from the Harrop kit relative to a centri kit from the stress at low RPM, though that's speculative at this point. With that said, I don't think any kit is more reliable than the other and anyone who supercharges an S65 should accept the calculated risk they are taking. It's worth it.
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11-21-2017, 10:28 AM | #9 | ||
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Boxer engines are known to be easier on their mains because of the balance right?.... |
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11-21-2017, 09:23 PM | #10 | |
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And that email wasn't from Harrop. |
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11-21-2017, 11:07 PM | #11 |
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11-22-2017, 06:08 AM | #12 | |
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Did u sell your SC? |
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11-22-2017, 06:28 AM | #13 | |
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Which ones don't? Please do correct me if I'm wrong, I'm most familiar with the Vortech-based kits so it's possible I'm missing something in regards to the Rotrex kits.
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Last edited by Iyzmi; 11-22-2017 at 06:36 AM.. |
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11-22-2017, 07:15 AM | #14 | ||
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11-22-2017, 10:21 AM | #15 | |
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ESS (Vortech) Evolve (Rotrex) G-Power (ASA) Harrop (Eaton) VF (Vortech) Kits that don't drive from the crank pulley and use their own pulley: AA (Rotrex) Gintani (Vortech) Almost all kits on the market drive from the crank pulley, not the opposite. Maybe you're referring to those who drive from the inner crank pulley instead of the crank accessory belt pulley? Evolve drives from the inner crank pulley, not sure about Harrop. Although I'd consider the inner crank pulley more risk for the engine because if the belt breaks, you lose the water pump as well. This is why most other kits don't do this. |
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11-22-2017, 12:14 PM | #16 | |
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Which of the above kits would not put more load on the main bearings? Harrop and Evolve?
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Last edited by Iyzmi; 11-22-2017 at 12:20 PM.. |
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11-22-2017, 07:41 PM | #17 |
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Haven't heard of a single engine hardware issue from any of our customers running the kit to date.
Still loving my kit years later. Definitely prefer that the supercharger be driven off the crank pulley in line with the other main accessories.
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11-22-2017, 08:09 PM | #18 |
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Would you feel comfortable installing this kit on an engine with factory installed mains? I'm still sorting out a replacement engine for my original that failed due to 2 ruined front mains. I want to install the kit but am still reeling from the senseless fail of my original engine....
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11-22-2017, 10:34 PM | #19 | |
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11-26-2017, 01:48 AM | #20 |
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I have the ESS supercharger kit (~600HP). My engine blew up on stock internals and stock bearings (NOT related to the supercharger). My rod bearings seized as per usual. I should have changed them, and ESS recommends changing them (I bought the kit used so didn't speak to ESS first). I don't think all stock engines with stock bearings fail, but if something is gonna fail, it's most likely those rod bearings. Mine would likely have failed eventually even without the supercharger.
The first replacement engine I bought ended up being scrap because it had major main bearing issue which actually cracked the block on 3 of the support structures (starting at the seat of the main bearing all the way down to the cylinder). No idea what happened to it, though I'm guessing serious overheating. I was quite upset as the seller wouldn't take it back despite selling it as a rebuildable engine. Shows that mains do fail occasionally, though pretty rare. Anyway, rod bearings are the most likely thing to fail. Definitely recommend upgrading those on your new engine. If you will have the crank out then may as well do coated mains too. I went with VAC coated mains and BE rod bearings on the new build. Thanks! S. |
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