Re: Ranger Piston Sizes

[mileslong2k]

'If a person were to rat hole parts for a future Ranger engine rebuild, or cylinder upgrade (200 HP piston use) would it be wise to find Standard pistons, or say, .010, or .020" pistons? You can always have the oversized pistons machined down, right?

Jim Long'

[Mike Danielle]

'...or you can have the cylinders plated down.

Ranger Mike

----- Original Message -----
From: "mileslong2k"
To:
Sent: Sunday, December 20, 2009 6:32 PM
Subject: [fairchildclub] Ranger Piston Sizes


> If a person were to rat hole parts for a future Ranger engine rebuild, or
> cylinder upgrade (200 HP piston use) would it be wise to find Standard
> pistons, or say, .010, or .020" pistons? You can always have the oversized
> pistons machined down, right?
>
> Jim Long
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

'

[mileslong2k]

'Thanks Mike,
I never thought of that. This is good to know.
Jim Long

--- In fairchildclub@yahoogroups.com, "Mike Danielle" wrote:
>
> ...or you can have the cylinders plated down.
>
> Ranger Mike
> ----- Original Message -----
> From: "mileslong2k"
> To:
> Sent: Sunday, December 20, 2009 6:32 PM
> Subject: [fairchildclub] Ranger Piston Sizes
>
>
> > If a person were to rat hole parts for a future Ranger engine rebuild, or
> > cylinder upgrade (200 HP piston use) would it be wise to find Standard
> > pistons, or say, .010, or .020" pistons? You can always have the oversized
> > pistons machined down, right?
> >
> > Jim Long
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

'

[Michael Denest]

'Ummm, Mike is correct about chroming the cylinders but I would do that if there was no other alternative.  Ranger TBO's usually run about 600 hours.  If I were to stash extra parts, it would be a set of .010 over pistons and rings.  A standard cylinder dimension is 4.125 inch.  As long as the cylinder can be gound to the next oversize dimension, you are ok.  Fit the rings for a minimum of .018 end gap.  For oil consumption, stay away from the Warner mod, it is not approved for the Ranger.  Proper ring fit is the key to 1 qt./hr.

Machining pistons is not a good idea from the standpoint of the ring grooves which will be too far undersize to support the ring. 

Speaking of oil consumption, repouring the bearings and line boring to a smaller dimension from the .004 to .005 inch stated in the overhaul manual is considered a Major Repair and requires FAA 337 approval.  
 Mike


"He's crazy Lew, he builds toy airplanes".
- Capt. Frank Towns
Flight of the Phoenix




________________________________
From: mileslong2k
To: fairchildclub@yahoogroups.com
Sent: Sun, December 20, 2009 10:37:04 PM
Subject: [fairchildclub] Re: Ranger Piston Sizes

 


Thanks Mike,
I never thought of that. This is good to know.
Jim Long

--- In fairchildclub@ yahoogroups. com, "Mike Danielle" wrote:
>
> ...or you can have the cylinders plated down.
>
> Ranger Mike
> ----- Original Message -----
> From: "mileslong2k"
> To:
> Sent: Sunday, December 20, 2009 6:32 PM
> Subject: [fairchildclub] Ranger Piston Sizes
>
>
> > If a person were to rat hole parts for a future Ranger engine rebuild, or
> > cylinder upgrade (200 HP piston use) would it be wise to find Standard
> > pistons, or say, .010, or .020" pistons? You can always have the oversized
> > pistons machined down, right?
> >
> > Jim Long
> >
> >
> >
> > ------------ --------- --------- ------
> >
> > Yahoo! Groups Links
> >
> >
> >
>




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