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1G 1.130 or 1.134 Pistons


Proven Member
Feb 24, 2011
Richmond, Virginia
Whats the difference? Im building a 2.4 long rod with 156mm Pauters. Vendor said he could get Carillo Pistons for cheap and supplied the part number SC7262. Specs shows its 1.134, I thought the 2.4 long rod was suppose to get 1.130. Reason why I want CP is that they have the oil ring supported all the way around where Wisecos dont actually have a support at the top of the pin. Any thoughts?


DSM Wiseman
Jun 12, 2014
Japan / Mexico, Arizona
I know it's old, but nobody has responded and answered yet. So I input some for future reference.
That is called as 1.130 compression height piston in general, but it does not necessarily need to be exactly 1.130". If strictly speaking, it should be approx 1.140" to be lined up with the deck. But usually aftermarket forged pistons get slightly below deck when it's cold for some reason like expansion, resurfacing the block, etc. So that difference is just a difference between manufacturer's spec.
Both would work just fine as 1.130" piston. Usually you don't need to care much about that difference if you would use steel rods. If you want to strictly set piston to head/piston to valve clearance such as for aluminum rods or some reason, then go with the one that fits better with your setup.
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