I run newer high grade bolts on the stock damper which are loctited in... The factory bolts should have been M8 sizing. My damper has the power steering / AC pulley lathed off so that it is a single 4-rib pulley. It's probably close to half the stock damper weight.
Running a billet oil pump and harmonic damper aren't bad recommendations, I'm just putting it out there that there is another different option that isn't as well known. As far as I know, the guys here running the Peterson valve aren't even using the billet oil pump gears. The external relief valve by itself is enough to stop shattering pump gears.I should point out that nearly all these cars are N/A not turbo'd, but most rev far far higher than 7400rpm. I also know that the billet gears were tested with stock dampers and there were multiple failures, so the billet gears alone aren't enough to stop the pump failures. The external relief valves aren't overly expensive, and if you are already running an oil cooler then it's just the return feed into the sump that is tricky. It's also nice to be able to adjust oil pressure externally. |
Originally Posted by Madjak
(Post 1377010)
I also know that the billet gears were tested with stock dampers and there were multiple failures, so the billet gears alone aren't enough to stop the pump failures.
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Originally Posted by Savington
(Post 1377027)
I am highly skeptical of this. I have pictures from the gears that came out of one of my motors that broke the a factory main bolt several years ago. 300+whp with no #1 main cap support, so the end of the crank was supported entirely by the oil pump. OEM damper too, since this was before the SPM damper existed. It fractured the oil pump housing in three places and cracked the #2 main cap as well. The billet gears were unscathed. In my experienced opinion, those gears are virtually indestructible.
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Sorry, but I strongly doubt it. I would need to see pictures of the gears to convince me otherwise. My first-hand, direct personal experience indicates that the gears are indestructible.
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That's fine, doubt away. I don't have photos and it's not my first-hand experience so I can hardly vouch for it. They weren't Boundary Engineering gears either as this would have been before their time, so they were probably custom made in Aus. It's not an easy thing to get experience with as the end result is a destroyed motor.
I have actually thought about buying a SuperMiata Damper, machining off the outer pulley and running it as a replacement to my stock one. It would fix my concerns with the two piece hub, although it might end up being too light to be effective. |
Originally Posted by Madjak
(Post 1377043)
I have actually thought about buying a SuperMiata Damper, machining off the outer pulley and running it as a replacement to my stock one. It would fix my concerns with the two piece hub, although it might end up being too light to be effective.
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Originally Posted by Madjak
(Post 1377043)
That's fine, doubt away. I don't have photos and it's not my first-hand experience so I can hardly vouch for it. They weren't Boundary Engineering gears either as this would have been before their time, so they were probably custom made in Aus.
I have actually thought about buying a SuperMiata Damper, machining off the outer pulley and running it as a replacement to my stock one. It would fix my concerns with the two piece hub, although it might end up being too light to be effective. |
Just something that was pointed out to me while considering picking up the external valve. Pretty sure you need a non thermostatic sandwich plate, or you would get weird behavior on startup.
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Originally Posted by aidandj
(Post 1377343)
Just something that was pointed out to me while considering picking up the external valve. Pretty sure you need a non thermostatic sandwich plate, or you would get weird behavior on startup.
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But if you are bypassing the cooler then you are bypassing the relief valve. Which would cause oil pressure control issues if its not open?
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Originally Posted by aidandj
(Post 1377348)
But if you are bypassing the cooler then you are bypassing the relief valve. Which would cause oil pressure control issues if its not open?
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Ok. thats what I thought.
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Originally Posted by aidandj
(Post 1377348)
But if you are bypassing the cooler then you are bypassing the relief valve. Which would cause oil pressure control issues if its not open?
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Originally Posted by Savington
(Post 1377424)
Only if you have the relief valve plumbed inline with the cooler.
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So is there any more runs of these being made ??
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Originally Posted by tdpolo26
(Post 1396878)
So is there any more runs of these being made ??
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Out of production until further notice. Too many production runs had to be reworked and parts scrapped because they did not meet the drawing or our quality standards. Simply put BHJ is just not able to make a consistent high quality product so we threw in the towel. We don't like the subject our customers to the inconveniences that come with parts that are not ready to install.
We are currently reviewing samples from other suppliers and have made a few design improvements along the way. No ETA or other information available at this time. if you need a quality damper right now I would suggest the ATI from Flyin Miata. It's a bit more expensive but a proven piece. |
Well shit. I have a used one that was sitting around, waiting to go on. How do I tell if mine is a P O S?
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Originally Posted by Chilicharger665
(Post 1421475)
Well shit. I have a used one that was sitting around, waiting to go on. How do I tell if mine is a P O S?
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Originally Posted by Chilicharger665
(Post 1421475)
Well shit. I have a used one that was sitting around, waiting to go on. How do I tell if mine is a P O S?
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