Ford i6 pistons

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Dec 10, 2016 | 12:22 AM

Lilbrowntruck

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Ford i6 pistons

Ok ever body I have a Ford 300 being rebuilt and I have a cracked piston. What happened before my uncle had given it to me he overheated it and put all new parts except the pistons and 580k after the rebuild piston cracks and since I am rebuilding it I would like to go with another stock cam but I would like to run flat top pistons instead of dished do I need to worry about clearance there am i gonna hit vavle without a dish. And btw I would buy cam but I live in California and I am not trying to deal with the whole smog legal thing I'm just gonna throw flat tops in (if possible) and run with it also the head and block may have been ground and in a couple of days here I get tools together for measuring the deck height. PS I'm not completely retarded Motor wise I've played with plenty of vw motors and even a 302.

Dec 10, 2016 | 06:02 AM

Mudsport96

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Joined: Aug 2010

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From: Chillicothe

https://m.summitracing.com/search/department/engines-components/part-type/pistons/engine-type/l6/make/ford/engine-size/4-9l-300/engine-family/ford-inline-6-cylinder/piston-style/flat-top-with-no-valve-reliefs

take your pick. All flat tops from summit. Can't help with the valve clearance answer though

Dec 10, 2016 | 10:54 AM

Vadis

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Joined: Jun 2012

Posts: 432

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From: BC, Canada

I rebuild my 300 a few years back and put in stock D dished pistons. You should be fine running flat tops and full dished pistons. Some guys even bore the block 0.050 over and run 390 pistons.
As far as cams go, if you're even thinking about it I would look into it. You have the engine apart now, now is the time to do things. Conanski is the cam guy, so he might be able to suggest something better, but I know a lot of people have success with Comp Cam 260s in the 300.