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by HalfaDave Wed Apr 17, 2024 8:28 pm
Cox Engine of The Month
Aluminum Cox .049 Pistons
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Re: Aluminum Cox .049 Pistons
Good job so far on the crankcase repair. However, I noticed one thing not mentioned throughout this. I will go back and re-read, but wanted to mention the oil groove. In the original cankcase nose, there is an oil groove for lubrication. Did you make one in your sleeve, or is it the fact that if using bronze, one would not need an oil groove?
NEW222- Top Poster
- Posts : 3892
Join date : 2011-08-13
Age : 45
Location : oakbank, mb
Re: Aluminum Cox .049 Pistons
I guess it would also be fair to ask. How long is your bushing? Is it the full length, or is it just near the tip of the crankcase? Great restoration of a run-out engine.
NEW222- Top Poster
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Join date : 2011-08-13
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Re: Aluminum Cox .049 Pistons
Hi I went just past the oil collector in the shaft. Exactly 4 mm. I am really impressed how much improvement was over aluminum.
Thanks
Ice
Thanks
Ice
Iceberg- Gold Member
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Join date : 2018-11-03
Location : Suva Fiji Islands
Re: Aluminum Cox .049 Pistons
Thank you for clearing that up.
NEW222- Top Poster
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Re: Aluminum Cox .049 Pistons
Hello Iceberg
I guess you placed the crankcase in the milling machine and bored thru or just place the crankcase in the jaws of the lathe and used the end mill on the tailpost. Thanks for posting the information. Let us know how it runs,great job!
Juan
I guess you placed the crankcase in the milling machine and bored thru or just place the crankcase in the jaws of the lathe and used the end mill on the tailpost. Thanks for posting the information. Let us know how it runs,great job!
Juan
F4D Phantom II- Gold Member
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Iceberg- Gold Member
- Posts : 381
Join date : 2018-11-03
Location : Suva Fiji Islands
Re: Aluminum Cox .049 Pistons
After running the aluminum piston for the .049 I would not give much of a positive comment. It seemed to lose compression after only 4-5 runs. The RPM was not any higher I think than the normal piston. I think the aluminum was just an experiment is all. The block with bronze insert is undoubtedly awesome though.
Ice
Ice
Iceberg- Gold Member
- Posts : 381
Join date : 2018-11-03
Location : Suva Fiji Islands
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