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slanted87
 Post subject: Pistons
PostPosted: Fri May 22, 2009 12:59 pm 
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3 Deuce Weber
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A set of pistons on EBAY, item # 390053955739. These are Chrysler factory pistons, and are dished!! P/N 2084390. Are these the "truck" low compression pistons?
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Shaker223
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PostPosted: Fri May 22, 2009 2:08 pm 
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Stock style pistons are cheaper at summit racing <$12 per slug.

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SlantSixDan
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PostPosted: Fri May 22, 2009 2:35 pm 
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2084 390 = 0.020" oversize, export low compression.

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slanted87
 Post subject: Pistons
PostPosted: Fri May 22, 2009 3:31 pm 
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Thanks Dan.
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Shaker223
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PostPosted: Sat May 23, 2009 2:28 pm 
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Quote:
2084 390 = 0.020" oversize, export low compression.
What are they...about 6:1 for a compression ratio?

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SlantSixDan
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PostPosted: Sat May 23, 2009 2:37 pm 
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Don't believe I have that specification! 7 or 7.5 stands out in my mind but that might be out of thin air. Someone would have to do the math. Seems to me these'd be a great pick for a turbo setup...

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Shaker223
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PostPosted: Sun May 24, 2009 6:33 am 
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Don't believe I have that specification! 7 or 7.5 stands out in my mind but that might be out of thin air. Someone would have to do the math. Seems to me these'd be a great pick for a turbo setup...
The normal pistons are good for boost but if these are 7:1 then they need 40 pounds of boost!!

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slantzilla
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PostPosted: Sun May 24, 2009 6:53 am 
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Some of the later Slants were barely over 7.5 anyway thanks to Chrysler's tight machining standards. :?

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Charrlie_S
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PostPosted: Sun May 24, 2009 8:52 am 
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Sealed Power catalog.

LC244P 1.760 comp dist, resessed head .208 deep x 2.500 dia 7.0-1 comp.

244NP 1.740 comp dist, flat head, 8.2-1 comp.

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Shaker223
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PostPosted: Sun May 24, 2009 9:57 am 
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Some of the later Slants were barely over 7.5 anyway thanks to Chrysler's tight machining standards. :?
Get everything on the big side and you have a slug or get everything on the low side and it can run like a scalded dog.

My 340 is 9.4 to 1...advertised 10.25 and a mid 70s smogger 360 I checked was something like 7.5 to one.

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http://www.youtube.com/watch?v=EAxRmoDgsdY
Chassis dyno
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