Forged pistons
#1
Scooby Regular
Thread Starter
Forged pistons
Hi guys I've bought some forged pistons for my rebuild and noticed they are shorter in depth than my stock ones so I dropped one in and it doesn't quite reach the top of the block when it's at its highest there is 3mm difference will this cause me problems or is this normal for a forged piston
orged piston
orged piston
#2
Scooby Regular
i'm assuming standard does have you compared both , i know the skirt of the forged pistons are normally shorter which is why you get more noise , i'm sure some one with more knowledge than me will be along soon , sorry to sound silly i assume crank is definitely at it's highest point
#5
Scooby Regular
Thread Starter
Did some digging on them and found out they are 92mm to use with a 79mm crank (newage) I believe ej205-ej207 and standard rods. No good for me as mine is a classic with a 75mm crank so I'll sell them on
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#12
Scooby Regular
my knowledge is not good enough to answer that , won't compression be down a lot or maybe not ? i would call a couple of engine builders , personally i see no reason why it would not work it would need its mapped checked any way , at least if it works well you then know your pistons are strong
#13
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The c/r will be down, the squish will be wrong, also more prone to gasket failure as the ignition will be happening down the bore. Dont know specifics about subaru blocks yet as new to imprezas but maybe posible to machine the top of the block to correct the deck height. (Usual practice on a lot of other manufacturers blocks)
#14
Scooby Regular
iTrader: (5)
The c/r will be down, the squish will be wrong, also more prone to gasket failure as the ignition will be happening down the bore. Dont know specifics about subaru blocks yet as new to imprezas but maybe posible to machine the top of the block to correct the deck height. (Usual practice on a lot of other manufacturers blocks)
Best bet is just speak to ASperfomance, alyn will machine your block and supply the crank and bearings. Hes cheaper than anyone else and always genuine parts.