Re: [AMC-List] 287/327 Piston Heights

[Mark Price <markprice242@xxxxxxxxxxxx>]

Thanks,
I wrote that. I thought that was how the compression was dropped as I was pretty sure they ran flattop pistons in both engines.
I looked at the shortblock in my shop yesterday and it is a 4 barrel engine.
Just doing a rough check of two pistons at tdc they are over .060" down the hole.
The engine uses steel shim head gaskets, so even the four barrel could use some decking to get the pistons up to a quench compliant state.
  I'm thinking of starting the search for a fresh set of 4 barrel pistons.
My Jeep 327 is the 2 barrel variant. It only has 37,000 miles on it so it should be good for standard bore pistons barring some unknown at this time problem.
 Be nice to find a piston with a slight dish to keep it at 9-1 for gas but get it into quench. Probably not worth the trouble just speculating at this time.
--
Mark Price
markprice242ATadelphia.net
Morgantown, WV


---- Michael Bailey <route66rambler@xxxxxxxxx> wrote: 
> 
>  Someone on the List here wrote:
> 
> Lots of room in the trunk on one of these for a big LPG tank!  4 barrel 327
> 
> runs about 9.7:1 in compression the Jeep engine you have is two barrel
> 
> and drops down around 9:1, maybe 8,7:1.  I think the two barrel just uses
> 
> a shorter piston height.  I've never found the piston heights to know
> 
> for sure.
> 
> ---------> According to the "American Motors Performance Engine Book" 
> 
> edited by Dick Datson of Total Performance Independents,  
> 
> "It should be assumed that pistons for 327 V8's (8.7 and 9.7 to 1)can be 
> 
> interchanged in complete sets as the only apparent difference is 3/64" 
> 
> less height on 8.7 to 1 pistons".  The chart shown lists the height of 4 
> 
> barrel pistons at 1-15/16, and the height of 2 barrel pistons at 1-57/64.  It 
> 
> should be noted that this is actually 2/64 or 1/32 difference in height, 
> 
> not 3/64 as stated above.
> 
>    I only just got the book and was looking through it when I saw your
> 
> note.  I have no idea at this point in time whether or not this book is 
> 
> worth the paper it's printed on.  Take it with a grain of salt.
> 
> mike
> 
> 
> 
>  		
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