Tuesday, 27 November 2012

Forged Pistons , Ring end gap & Piston clearance by Arias

Minimum Ring End Gaps And Clearance

Ring Application Minimum End Gap Per Inch Of Bore
Premium Top Rings Blown Fuel, Alky, Gas 0.008

Injected Fuel 0.007

Blown Fuel, Alky, Gas 0.0075

Blown Gas, Street 0.0065

Nitrous Less 250hp 0.0065

Heavy Nitrous 250hp+ 0.0075

Na Alky, Gas 0.0055

N.a Gas, Street 0.005

Cast Iron Second Rings Blown Fuel, Alky, Gas 0.006

Na Alky, Fuel 0.005

Na Gas 0.004

Third Groove Oil Control Rings Upper And Lower Rails .015"  min.

Recommended Piston Clearances

Minimum Piston To Valve Normally Aspirated Int. 090"   Exh. .110"

Blown Int. .125"  Exh. .175"

Minimum Piston To Head Steel Rods .040"-.050"

Source : http://ariaspistons.com/technical.asp


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