Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Selected: .060" oversize piston set
Select variations below for more info:
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
![Classic Austin Mini-county'- 998 Std Dished Piston With Rings & Pins Classic Austin Mini-county'- 998 Std Dished Piston With Rings & Pins](/sysimages/dot.gif)
Classic Austin Mini-county'- 998 Std Dished Piston With Rings & PinsClassic Austin Mini-county'- 998 Std Dished Piston With Rings & PinsClassic Austin Mini-county'- 998 Std Dished Piston With Rings & PinsClassic Austin Mini-county'- 998 Std Dished Piston With Rings & Pins
![Classic Austin Mini-county'- 998 Std Dished Piston With Rings & Pins Classic Austin Mini-county'- 998 Std Dished Piston With Rings & Pins](/sysimages/dot.gif)
Selected: Standard piston set
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
![Classic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & Pins Classic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & Pins](/sysimages/dot.gif)
Classic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & PinsClassic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & PinsClassic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & Pins
![Classic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & Pins Classic Austin Mini Cooper-county 998 +.020 Dished Piston Set + Rings & Pins](/sysimages/dot.gif)
Selected: .020" oversize piston set
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
![998 +.040 Dished Piston Set With Rings & Pins County Brand 998 +.040 Dished Piston Set With Rings & Pins County Brand](/sysimages/dot.gif)
998 +.040 Dished Piston Set With Rings & Pins County Brand998 +.040 Dished Piston Set With Rings & Pins County Brand
![998 +.040 Dished Piston Set With Rings & Pins County Brand 998 +.040 Dished Piston Set With Rings & Pins County Brand](/sysimages/dot.gif)
Selected: .040" oversize piston set
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Question:
We are looking at getting a few sets of the 998 +0.040" pistons sent out for our Mini 7 racing engines but I would like to know what the ring groove dimensions are on these.
Answer:
Checking the Nural branded 20773's we get 1.5~1.6mm for the top three grooves (3mm deep), and the oil ring is approx. 4mm.
Mini Mania Tech Team
The Classic Mini Parts and Accessories Experts
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Selected: .030" oversize piston set
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
Brand new engine set of four pistons. Pistons are 8.9:1 compression ratio.Slight dish. Made by County Engineering . Set contains four each pistons , rings , pins and clips.
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Related Technical Articles:
![Classic Mini Cooper Pistons for High Performance or Stock page34](/sysimages/dot.gif)
Created: January 03, 2019
We offer many pistons options for the Classic Mini as built from 1959 t 2000. Standard bore. Various designs and size pistons options for 998cc, 1275cc & 1380cc engines. High or low compression options includes rings and pins.
![Small bore piston applications](/sysimages/dot.gif)
Created: December 20, 2013
Small piston applications and availability have been changing over time
![CHECKING PISTON COMPRESSION RING GAPS](/sysimages/dot.gif)
Created: September 21, 2010
The following chart shows the SAE recommended Automotive compression ring end gaps. These recommendations are followed for the majority of the ring line unless a certain application requires deviation from the chart.
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