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-   Engine Performance (https://www.miataturbo.net/engine-performance-56/)
-   -   Belfab rods and pistons/ (https://www.miataturbo.net/engine-performance-56/belfab-rods-pistons-28055/)

firedog25 Nov 14, 2008 09:44 AM

Yah, last year when I had questions Belfab was PROMPT with the reply and it was cockeyed hours. I haven't heard anything bad about their product or their company so I'm thinking they're the one's for me.

vtluu Jul 21, 2009 12:59 PM


Originally Posted by thymer (Post 329970)
There is an issue with the rods as I personally experienced it with Wiseco Pistons. The clearance for the piston pin is way too tight on the piston end of the rod and has to be machined down. Mine were clearanced by polishing.

I had the same problem with my Eagle rods and Wiseco pistons.

The Wiseco pins worked just fine with the stock rods.

I don't buy the assertion that it's so they can be machined down. If that were the case then the crankshaft bore would also be too tight (they're not). The specs are in the factory manual and as long as the parts are strictly made to those specs, they should all fit together. If I wanted undersized bore holes that I have to machine out, I would have specified that. The rods are just made wrong.

Based on what I've heard about Eagle rod quality (from someone I know who's worked with and built scores if not hundreds of race engines: "it's crap"), I guess I shouldn't be surprised. I'm gonna give the M-Tuned or Belfab rods a try on my next build.

UrbanSoot Jul 21, 2009 01:09 PM

way to bring up dead thread!

anyways, that seems to be the problem with wiseco pistons, not rods.

vtluu Jul 21, 2009 01:10 PM


Originally Posted by UrbanSoot (Post 432869)
anyways, that seems to be the problem with wiseco pistons, not rods.

As I said, the Wiseco pins worked just fine with the OEM rods, so I'm placing the blame on Eagle's end.

Not that Wiseco is perfect either. I'd rather not have to modify the oil squirters to keep the pistons from crashing into them.

thymer Jul 21, 2009 01:14 PM


Originally Posted by vtluu (Post 432870)
Not that Wiseco is perfect either. I'd rather not have to modify the oil squirters to keep the pistons from crashing into them.

Huh? I didn't have to modify my wiseco's (low compression)

vtluu Jul 21, 2009 01:25 PM

The Wiseco pistons, at least the high-compression ones, hit the oil squirter nozzles near the bottom of the stroke. Most people cut the oil squirters or just delete them altogether.

tyson87 Jul 22, 2009 11:43 AM

https://www.miataturbo.net/forum/t37356/#post433338


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