Question on .060 oversized pistons.

[Reg Evans]

I told a friend yesterday about my engine with the .06 oversized pistons in it and he said "OH NO....you're going to have overheating problems during the summer months" He says he never goes over .03. Says he has the cylinders sleeved if over that.

He's a retired chief ships engineer and was in charge of keeping the big ships shipshape.

I'm a bit skeptical but wondered what your experiences have been.

[Merle Coggins]

Since pistons for these engines are available up to .080" or .090" oversize, I wouldn't be too concerned at .060" over.

[Reg Evans]

That's what I have heard over the years too. Anyone here have a .060 over or more engine they can report on?

[Mick Blake]

I have a 1954 Plymouth which was done.090 oversized, over 5 years ago, and never had a problem.

[Jim Shepard]

I've got access to a 'free' 230 if I want it (which I do). According to my book, the difference between the 218 and the 230 is the stroke - the bore is the same. So, I'm thinking about .06 over for my rebuild of the 230. I would think that if a .09 is available, the .06 would be pretty safe, all things being equal.

[Olddaddy]

My 218 is being built with a 230 crank and rods. It was bored .030 by the previous owner, I took it to .060 without any worries. George Asche does 090 and takes .100 off the heads!

[Dodgeb4ya]

Never had a problem in my 218 W/.060 for 15 years!

[dmulhall]

anyone have a good 230 crank and rods?

Thanks,

Dave

[Tony_Urwin]

My 218 is being built with a 230 crank and rods. It was bored .030 by the previous owner, I took it to .060 without any worries. George Asche does 090 and takes .100 off the heads!

That's true, but his Plymouth pings unless he uses high-octane. I think he took 90 thou off that head.

[norrism1]

My 51 B3B had .060 oversize pistons. Started up in the coldest winter in NY and never got hot driving in the summer.

[Reg Evans]

I finally got the SpitSfire engine installed. I guess I'm going to install some type of cable carb linkage though cause nothing I have around here works.

She sure sounds great with the Langdon headers and the 2 bbl carb. I'm very anxious to take it on a road test to see if I can feel an increase in performance. Wahoo !!!

For some reason the oil pressure gauge reads 65lbs hot or cold. Is that gonna blow out a seal somewhere? I also need to find an air cleaner that will fit on the larger diameter throat the 2 bbl carb has. The one on the carb is just sitting there now. It won't clamp down.

[bkahler]

Reg, my 218 has been bored .060" oversized unfortunately I have not started the engine yet so I can't report on over heating issues. I'm with the other guys however in that if they sell pistons to .090" and more then .060" should be no problem at all.

Brad

[Guest mjmcorbett]

I've got a 251 spitfire .060 over and in 5000 miles have had no overheating problems. I am currently installing h.e. distributor from Langdon and doing the two barrel carb deal. I am sure I'll be able to tell the difference in power (I sure hope so !!).

Mike C.