ASC539021
ASC539021
36 in stock
Couldn't load pickup availability
Order 12 or more Pistons and Save 10%
Only applies to pistons - you can mix part numbers - Discount is automatically applied at check out.
ASC539021 Rev B Piston
- C-75, C-85, C-90, O-200 & O-300 Continental Series Engines
- 9.0:1 Compression Ratio in C-90, O-200 & O-300 Series Engines
- 8.0:1 Compression Ration in C-75 & C-85 Series Engines
- 4.062 Bore
- Available in STD & P15 Bore Sizes
- Approx weight = 730 grams
- This piston uses standard Continental Rings and Piston Pins
- This piston uses 2 Compression rings and one vented Oil Control (1 or 2 piece) ring. The Oil Scraper Ring is not used since the groove below the pin is omitted.
- This Piston is not FAA-PMA approved and is for experimental or ground use only!
- Forged and Machined in the USA
- This is a high performance piston with tighter piston to cylinder clearances than OEM specifications. It is important to ensure that choked cylinders have no more than .013" of diametrical choke.
Share
We recently purchased a set of four balanced ASC539021 pistons for a Cub project using an O200 experimental TXM engine. The pistons arrived on time (very good tracking system); all have the exact same weight; the quality of the piston is extremely good. The piston allows the use of (a) the OEM piston pin without the need for rod busing machining (b) and the OEM rings. In our application, the piston will be used with a gapless second compression ring, with OEM rings for the top compression ring and third OEM ring used for oil control. No oil scraping ring is needed like in the original lower (7:1) compression pistons. The ASC539021 pistons seems to be an ideal solution to correcting the typical operational issues (elevated oil temp, excessive blowby, the use of 100LL) associated with the early low compression O200A engines.
These pistons look to be very good quality. Can't wait to get them installed.
