1st Gen. Ram - All Topics Discussion for all Dodge Rams prior to 1994. This includes engine, drivetrain and non-drivetrain discussions. Anything prior to 1994 should go in here.

where to get pistons

Old Aug 11, 2010 | 10:10 AM
  #16  
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yeah i spoke to a guy from mahle and he said "pretty much indestructable" but understand what he means. some people can wreck anything. what is the difference between the ic and non ic pistons? and what kind of a difference will the bigger pistons make for my truck, if any?
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Old Aug 11, 2010 | 10:16 AM
  #17  
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They have a bigger bowl, some people call it the "cowboy hat" style. They are supposed to be better for performance use.

What are you plans for the truck?
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Old Aug 11, 2010 | 10:31 AM
  #18  
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does the "hat" change the burn or the comp. or something? i plan on driving home to san diego from new hampshire and then down to the tip of baja for a surf/fishing trip. from there it will be used as a fun dd.
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Old Aug 11, 2010 | 10:38 AM
  #19  
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The comp ratio is the same bewtween a IC and non/IC AFAIK.

Lots of people are running inj. made for an IC motor in the non/IC.
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Old Aug 11, 2010 | 05:30 PM
  #20  
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I know they are close, I think the Non-IC might be 16.5:1 and the IC 17:1 but dont hold me to it. If I had to buy pistons for a engine build from stock to mild (800hp) I would go with the Non-IC pistons hands down.
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Old Aug 11, 2010 | 07:23 PM
  #21  
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Courtesy of my Cummins Shop Manual from 1990, compression ratio is 17.5:1.
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Old Aug 11, 2010 | 11:01 PM
  #22  
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Jim, you are correct. And after alittle research all VE trucks had the same 17.5:1 compression ratio.

The non-ic piston as a wider but shallower bowl. It is designed for the 155* spray pattern.
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Old Aug 11, 2010 | 11:18 PM
  #23  
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And is it 145* that the i/c pistons are designed for?
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Old Aug 12, 2010 | 05:01 AM
  #24  
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Originally Posted by CaptainChrysler
You can get replacement pistons from Mahle, too. They have lots of pistons for the 5.9. Now you are gonna have to figure out wich ones you want. I'd use the non/IC version.

I don't even know if you can just go buy the monotherms, I think there is a waiting period.

I am pretty sure the valves are next in line of failure after the pistons.

If you read there ads, it says something like they "virtually eliminate piston failure". So for $3K they still won't guarantee it.
Would you guarantee your pistons when you know a bunch of hotrodders like us are messing with their engines?!
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Old Aug 12, 2010 | 07:37 AM
  #25  
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If you melt them down, it would be nice if them would replace them.

If it were a mechanical failure, like a rod lets go or valve drops, then it's on you.

I suppose if you have enough supporting mods to melt them, $3K for new ones is probably minor.
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Old Aug 12, 2010 | 12:00 PM
  #26  
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Yes the i/c pistons are 145* pattern.
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Old Aug 12, 2010 | 02:58 PM
  #27  
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I remember Pulltilbroke said to get some industrial pistons because of there bowl shape. Also I've heard you can get them coated to handle more heat? sounds like cheap insurance to me.
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