FS_Line bored 1.7L Cases w/ 2.0 crankshafts Options

[Jesco Reient]

I have to offer for sale two separate 1.7L cases that I have line bored. I have cut the cylinder spigots to clean them up. The oil plugs have been removed and tapped for pipe plugs, (I have aluminum AN Galley plugs available for an additional charge) The price also includes a new set of +0.50MM Mahle main bearings for the case/crank combination offered as well.

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The first case and crankshaft are +0.50MM on the main Bores, with a 0.010/0.010 crankshaft and bearings.

The second case and crankshaft are +0.50MM on the main Bores, with a 0.020/0.020 crankshaft and bearings.

They are offered at 850.00 plus shipping each. Detailed pictures of the bearing surfaces are available upon request. Detailed sheets of the final measurements are available also. For those interested in purchasing one of these cases.

You can PM me at this website, or send me an e-mail at BellCobraIV@AOL.com

[Jesco Reient]

Perhaps if I explained the situation better then there might be more interest in these cases. Last Year when I was building my wife's 914 the motor needed to be line bored, now before semi-retirement I built Rolls Royce Merlin V-12 engines and large Curtiss Wright 18 Cylinder radial engines for unlimited airplane racing. The tooling available that I was looking at was in my opinion substandard for the result I wanted. Even well known Type IV builders regarding line boring the Type IV case suggested finding one that did not need to be line bored. So as I did with the aircraft engines when a challenge came along, I studied the process, looked at what was being done and what it was going to take to get the result I wanted to achieve. So I made a new boring bar out of very stable linear way tool steel I made it as large as possible allowing the best available 90 degree cutting plane, Hard chromed the wear areas, used the highest quality indexable carbide boring tooling available and built a new bar with tapered expandable colletts on each end to locate the bar accurately. The total run-out on each of the expandable colletts was less than .0001 thousandths of an inch. I have done several cases up to this point with excellent results. I thought possibly it was time to explain this, and perhaps you will all understand the reason for the pricing. I also made the tooling for cutting the cylinder registers while torqued to a plate so the torque stresses are correct for those areas also.


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The tooling laid into a case to show it's fitment.