Icon IC 743 piston weight incorrect

72DMag said
@nm9stheham Sorry didn't get back to you sooner been away from computer. I see what you mean now. When you said pad of the rod I thought of the small end since alot of guys grind those when doing a stroker.

Actually you have me thinking that I could possibly make the ic743 dome pistons work. I have them boxed but didn't return yet. I think I would need to grind both the top and bottom end though. I would grind the top as pictured above and might get like 20 grams off of it If I had to guess. Then I will grind the big end of the rod to a round shape like pictured. I bet I can get 10 grams off of it which would be 20 total bobweight. Again these are just numbers I am tossing out but that takes off 40 grams and only puts me 31 grams heavier than stock. So it will be close.

I could also use the 18 grams lighter wrist pin but with high compression sounds like a bad idea to me and not going to consider it.

I will be at the shop tmrow and I have some scrap magnum rods I can use for testing. Will measure cap weight by itself too and see what my final weights turn out to be. Thanks!

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Funny thing about the wrist pin being too light and/or flexing...I ran across a thread on Yellow Bullet a few days after I posted about the light pin deal.

Anyhoo...this guy buys a I believe a complete car or truck or something and made one or two hits on it and then it broke a rod right above the big end. He was calling it a rod failure, which it was, but it didn’t fail because the rod was junk.

The upshot of all this is the rods were Molnar pieces which are great parts and the owner the guts to send the parts to Molnar to be inspected, even though the nattering nabobs said Molnar would just blow him off and lie to him.

The results were on the inspection the pin had seized in the rod and literally ripped the rod in two. I personally never seen that happen, but on several occasions I’ve been working on engines that have ripped the pin eye out of the rod, and also ripped the top off the piston.

So lighter isn’t always better. It has a dark side that if you dare go there, what happens is usually expensive.