just sent a block to GE, what size pistons should i run...in mm. im set on runing stock compression but as far as width how far should i go.? i originally planned 84mm but i could i gain more gains at 86mm? is it safe to run that size plus boost? i want to one day bring the boost to 20lbs track ....boost on street will be 9 lbs.
thanks...its gettin mated w/ eagle rods...gimmies suggestions.
what would 86mm be , 2.1L?

 

we have no idea what engine you have???

 

its a b18c gsr motor
sorry

 

84.5mm is the biggest that GE will recommed for a boosted motor...you can go 86 on an NA engine.

Ben

 

thanks for the reply ben , ur the best.
what does 84.5 equate too, 2.01 liter?

 

Right around that area..1.98 or something. I don't have the specs/calculator handy.

Ben

 

IMO, stick with stock bore or a lil over stock bore...just in case you bent a rod or melt the piston, you can always bore it out a lil larger and be as good as new...

versus running 84 or 84.5 mm, you'll have to get new sleeves..but again with perfect tuning, everything can be preventable....

it's all about tuning...