Standard size 74mm forged pistons

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triple j

Member +
Has any one used the standard size pistons in there forge build, i was thinking of using a low mileage 4efe for the job so i can keep my stock as a spare, i dont mind going the next size up along with a rebore, what are your thoughts on this.
 
thefalls

thefalls

Member +
Most of the people who had gone for a 74mm forged build did encounter some issues regarding bore clearance/tolerances. If my memory serves me right [was a while back] it was agreed that its better to go for a 74.5mm overbore. As a fresh rebore with new rings gives a better sealing of rings rather than a 'used' bore with new rings.
 
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triple j

Member +
Yeah the last thing i want is rings sealing bad, a fresh bore for new rings sounds better, i was thinking a low mileage 4efe would of had an easy life and the bores would be in good shape.
 
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Skalabala

Member +
The correct hone job will take material away of the 74mm bore and probably take it our of spec.
If you spend the money on forged pistons then its rather a must to have a perfect bore for them :)
PS: Wiseco has good P2W clearances :)
 
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triple j

Member +
True, until u rub off the bore numbers the machiene man put on the pistons lol, happened a friend when we where building his sr20det we got it sorted do, i think i will go the next size up, why sell the 74mm people must use them.
 
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