This is what I came up with Wisecos calculator. Why o why is the calculator using both imperial and metric??
ok, anyhow, my guesstimates were between 10.5:1 and 11.9:1. With stock values I got 11.1:1, which sounds just perfect.
Slightly related, I just read about an aquaintance of mine who had used 135mm long conrods instead of stock 122mm in his 4A-GE. Wonder what kind of pistons he used…?
(they were custom made by Wiseco + longer conrods from auto verdi)
Oh! Edit 7.9.2017 – where did I get these numbers
Bore diameter: 81,5mm
Engine stroke: 77mm
Head volume: 36cc (stock)
Gasket bore dia: 82mm (HKS)
Compressed gasket thickness: 1mm (HKS)
Deck clearance: 0.7mm (about)
Dome volume: -5.9cc, compared to stock (Wiseco)
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