[AJD] High Altitude Pistons in 520 - 2nd try

[Bus Driver]

The compression will still be less than most automotive engines. I feel
comfortable in saying that the 87 octane will be fine for such an engine.
The gasoline 520 had compression ratio of  7.1:1. The LP 520 had 8.75:1 cr.
The high altitude pistons probably are somewhere between.
----- Original Message ----- 
From: "Dean VP" <deanvp at att.net>
To: "AT JD" <antique-johndeere at lists.antique-tractor.com>
Sent: Wednesday, December 15, 2004 2:51 AM
Subject: [AJD] High Altitude Pistons in 520 - 2nd try


> What kind of compression increase would one get by using High Altitude
> pistons in a 520? I'm installing a NOS std block in my 520 and have just
run
> onto a set of NOS JD aluminum std High Altitude Pistons, pins and rings.
> Anyone know what the HP increase might be.  Or if there would be any
> noticeable problems running at sea level? My guess with today's gasoline
> there wouldn't be problems with pre-ignition knock.
>
>
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> I'm a walking storeroom of facts..... I've just lost the key to the
> storeroom door
>
>
> www.deerelegacy.com
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