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400 ..... again #699791 05/16/10 06:36 PM 05/16/10 06:36 PM
Joined: Jan 2004 Posts: 472 Hartselle AL 6 67MIke OP mopar
67MIke OP mopar 6 Joined: Jan 2004 Posts: 472 Hartselle AL	I know this seems to have been covered a million times, I just can't seem to find what I'm looking for.. What is a good non - stroker piston that I could use for my 400? It's a daily driver 4wd. The motor is stock right now, seems a little weak, other than that it runs good....mike

Re: 400 ..... again [Re: 67MIke] #699792 05/16/10 07:36 PM 05/16/10 07:36 PM
Joined: Jan 2003 Posts: 4,588 St. John's Newfoundland 440newport master
440newport master Joined: Jan 2003 Posts: 4,588 St. John's Newfoundland	For something that gives higher compression than stock the KB 240 is the only choice I know of. But at spec deck height it's still down in the hole slightly, and with a stock open chamber head compression is still going to be a little under 9.0.

Re: 400 ..... again [Re: 440newport] #699793 05/16/10 08:00 PM 05/16/10 08:00 PM
Joined: Dec 2003 Posts: 5,314 Carstairs, Alberta, Canada dave571 master
dave571 master Joined: Dec 2003 Posts: 5,314 Carstairs, Alberta, Canada	I've heard a .030 over 440 piston low comp piston can be used. You end up with a .008 over, close to flattop. The block would have to be pretty straight to get by with only .008 oversize. Perhaps a .040 over 440 slug would be a better pick.

Re: 400 ..... again [Re: 440newport] #699794 05/16/10 11:28 PM 05/16/10 11:28 PM
Joined: Aug 2007 Posts: 6,097 Valencia, España NachoRT74 master
NachoRT74 master Joined: Aug 2007 Posts: 6,097 Valencia, España	Quote: For something that gives higher compression than stock the KB 240 is the only choice I know of. But at spec deck height it's still down in the hole slightly, and with a stock open chamber head compression is still going to be a little under 9.0. one question... I already asked before but none answer, maybe you know... KB list the compression height for those pistons on 1.908" do you know the compression height for stock 400 pistons ? would love to make a mathematical comparision With a Charger born in Chrysler assembly plant in Valencia, Venezuela

Re: 400 ..... again [Re: 67MIke] #699795 05/17/10 12:42 AM 05/17/10 12:42 AM
Joined: Jan 2003 Posts: 2,004 s. e. pa. C calrobb2000 top fuel
calrobb2000 top fuel C Joined: Jan 2003 Posts: 2,004 s. e. pa.	hi one way to rais the comp would be to use some 516 headswith 1,74 ex valves. also you could deck the block some ? 400 piston heigth varies some , mine are 110" down from deck ?

Re: 400 ..... again [Re: NachoRT74] #699796 05/17/10 03:52 PM 05/17/10 03:52 PM
Joined: Jan 2003 Posts: 4,588 St. John's Newfoundland 440newport master
440newport master Joined: Jan 2003 Posts: 4,588 St. John's Newfoundland	Quote: one question... I already asked before but none answer, maybe you know... KB list the compression height for those pistons on 1.908" do you know the compression height for stock 400 pistons ? would love to make a mathematical comparision When I had my 400 apart last year I did measure the CH of one of the stock pistons but I don't think I wrote it down anywhere and for the life of me I can't remember. Sorry

Re: 400 ..... again [Re: 440newport] #699797 05/18/10 01:12 AM 05/18/10 01:12 AM
Joined: Aug 2007 Posts: 6,097 Valencia, España NachoRT74 master
NachoRT74 master Joined: Aug 2007 Posts: 6,097 Valencia, España	WELL just expecting that measurement somewhere sometime LOL With a Charger born in Chrysler assembly plant in Valencia, Venezuela

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