View Full Version : oversize pistons
hey guy's
I'm building a F7P turbo block and is about to order forged pistons
Now i was told that the STD bore sizes whur the same prize as the oversize ones (82.5 or 83 mm bore).
now my question is can the block handle high boost if you make the cylinders bigger?
i'm thinking about using a T3/T4 turbo
hope you can help me out.
tnx
dhayrone
there are three sizes available. 82mm 82.5mm and 83mm. all can handle high boost applications.
no mate i'm talking about the block itself
when you are using oversize pistons you have to make your cylinders bigger. now the bigger the cylinder the thinner the edge of the cylinder will become.
can the block handle the highboost?
yes mate i,m running bigger pistons and high boost. does not really increase capacity much though so just go up to the next size you need.
there are three sizes available. 82mm 82.5mm and 83mm. all can handle high boost applications.
i dont mean the pistons bt the block itself
when you use oversize pistons you got to make your cylinders bigger.
the bigget the Whole the smaller the cylinderwall will become.
now can those thin cylinderwalls handle high boost?
pressure of a T3/T4
yes mate i,m running bigger pistons and high boost. does not really increase capacity much though so just go up to the next size you need.
ok tnx mate
VIPERONE
16-05-2007, 21:29
i have an f7p bottom end which is bored to 2l
plenty of meat..i reckon you could go to 2.1 get it wire ringed and it'd be ok-ish
but then you need to make a custom headgasket as they don,t go over 82.7mm
williams is 83 bore std right?
VIPERONE
16-05-2007, 22:02
but then you need to make a custom head gasket as they don,t go over 82.7mm
i'd stick a cnc'd metal one in. lol copper one.
yeah or a custom spesso made item.
VIPERONE
16-05-2007, 22:28
i'd love to know what bb pay spesso for 1 1.6mil gasket bet its £10 lol
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