Will older model pistons work???
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Will older model pistons work???
I am rebuilding a 300 out of a 1984 and currently looking for pistons. There seems to be an abundance of older model pistons and I was wondering if these pistons would work in the 84. the flat heads are plentiful and much cheaper. Any advice would be much appreciated. Thanks Guys.
Lead Driver
Joined: Mar 2008
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From: Near Los Angeles
I am rebuilding a 300 out of a 1984 and currently looking for pistons. There seems to be an abundance of older model pistons and I was wondering if these pistons would work in the 84. the flat heads are plentiful and much cheaper. Any advice would be much appreciated. Thanks Guys.
IIRC, the flats are less compression than the EFI pistons, which have the D recess. What you need to know is the compression ratio of the pistons in question. Just because it has a flat top, doesn't mean anything. The EFI's are the highest I could find, w/o going forged. They are 8.7:1. IIRC Keith Black makes one with a higher cr.
Or you can bore your block to .050 over, and use 360 pistons. Drop in swap.
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I guess what you are saying is that most any year 300 pistons will work and if the efi will work and give a little extra compression then that sounds great if I understood you correctly when you said they are compatible.
Trailering
Joined: Nov 2010
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thats not what he is saying some of the older pistons have a very short compression distance,with a piston compression distance of 1767 to 1776 and you should be ok ,less than that and you will be low on compression,thats not good at all for the 300 =6 if your going to rebuild it go for zero deck for more compression,ZERO and the standard piston like a H519p with efi head will give you about 10 to 1 and you can still run pump gas
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