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*** SOLD ***
This is a used Rotrex C15-60 supercharger in perfect working condition. It comes with a custom-made steel mounting bracket to allow it to be used on any 1.8 liter Miata engine. You will need to purchase ancillary parts, such as the oil system (cooler, reservoir, filter and lines), intercooler (charge pipes are included, but not a few of the couplers, and you may need to change the routing for your application). The blow-off valve and hoses are included. Even though the used idler and tensioner pulleys are provided, I recommend new ones. Your belt length will depend on whether you have power steering or not. I used a 45.7" 4-rib belt (e.g.NAPA 25-040457) with my car without power steering. For the cherry on top, I am including nearly 1 liter of special Rotrex traction fluid (sells for >$100 per liter).
This is an excellent value used kit for someone who can source the rest of the parts. I recommend the folks at Track Dog Racing. Check out their website for any of the items needed to complete this setup. You will absolutely need aftermarket engine management and increased engine cooling mods for this setup. I was making north of 200rwhp on a BP-4W engine and 93 pump gas, and then around 220 rwhp on a BP-6D (VVT) on E85.
Couple questions:
All stock Miata stuff is 4 rib, what's the dealio with the 6 rib drive pulley? Is this going to force the buyer into an ATI or other aftermarket damper with a 6 rib?
IIRC (and it's been what, 10+ years?) your mount is a one off? Was that built around the 6 rib setup or would it have a hope of working with a 4 rib? If you could find a 4 rib drive pulley would anything even line up?
KW style Bosch/VW recirc valve or other?
What's the diameter of that 6 rib drive pulley?
I had a fairly ill fated Kraftwerks C30-74 some time ago so I'm familiar with the Rotrex, and you've had enough track time on this one that the bugs are certainly worked out but details are lacking.
Either way, my interest is piqued and GLWS!
Couple questions:
All stock Miata stuff is 4 rib, what's the dealio with the 6 rib drive pulley? Is this going to force the buyer into an ATI or other aftermarket damper with a 6 rib?
IIRC (and it's been what, 10+ years?) your mount is a one off? Was that built around the 6 rib setup or would it have a hope of working with a 4 rib? If you could find a 4 rib drive pulley would anything even line up?
KW style Bosch/VW recirc valve or other?
What's the diameter of that 6 rib drive pulley?
I had a fairly ill fated Kraftwerks C30-74 some time ago so I'm familiar with the Rotrex, and you've had enough track time on this one that the bugs are certainly worked out but details are lacking.
Either way, my interest is piqued and GLWS!
You are correct, the belt is 4-rib.
The one-off steel mount was custom made when the Kraftwerk aluminum one broke 2 weeks prior to a big event. It's well made and really stout, so you will never need to worry about it.
The BOV is the original one from Bosch - it's worked fine.
The pulley is 75mm - should have mentioned that in the original post, and is designed to reach max Rotrex RPM (~150k) at ~7,300 engine RPM
09-05-2022, 05:26 PM
Rotrex C15-60 For Sale - $760
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