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230 with 218 rods.


Guzzishawn

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Hey there, I’ve been lurking for a bit, and I’m digging the advice given, I’ve got a ‘48 D24 kinda ratty driver, now apart to deal with some engine and rust issues, problem is I had the wrist pin bushings done and I found the #6 rod small end was out of round, made the mistake of not knowing what I was doing and ordered rods claimed to be from a 230 engine on  fleabay..... yup they seem to be rods from one of the bigger engines the offset being wrong etc....

local we have a guy selling a 218 for cheap, has anyone used 218 rods in the 230, I am aware the 218 rods are a hair longer, but had anyone ever relieved the head for such a thing, I’ve seen some flat heads using pop up pistons, my Harley K engine is set up like that, but in the end is it really worth it

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Actually you would be better off with longer rods. If you don't have new pistons yet, have some made with a slightly higher wrist pin + you get a modern piston / ring design.  If I ever go through my 230, I'll install 218 rods with shorter more modern pistons.

 

On edit: assemble 1 cylinder and see how far the piston actually comes out.  Some of these engines don't come all the way to the deck, might be ok with fly cutting the piston a little????  But then you still have a 4 ring pack long heavy piston.

Edited by Adam H P15 D30
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Yeah Adam, I recal some info I read from Smokey Yunick years ago about piston dwell time at top dead center being good to promote longer burn time and allowing for more complete pressure build, I think I’m describing it correctly, been a while since I read about it

 

 

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