changing pistons without rebalancing?
#1
changing pistons without rebalancing?
in my garage i have a professionally built 355 using forged probe pistons that weigh 541 grams. the pistons are high compression and im converting the motor to be used with a blower, the motor is fully balanced.
if i find another forged piston with a similar weight, can i install them without rebalancing? what differance in weight would be considered "acceptable"?
if i find another forged piston with a similar weight, can i install them without rebalancing? what differance in weight would be considered "acceptable"?
#3
in my garage i have a professionally built 355 using forged probe pistons that weigh 541 grams. the pistons are high compression and im converting the motor to be used with a blower, the motor is fully balanced.
if i find another forged piston with a similar weight, can i install them without rebalancing? what differance in weight would be considered "acceptable"?
if i find another forged piston with a similar weight, can i install them without rebalancing? what differance in weight would be considered "acceptable"?
Rich
#4
thank you guys for the fast responses,
so the keith black pistons i was *hoping* to use weigh 514 grams apiece, as opposed to the current pistons weight of 541 grams.
so is that 27 gram differeance too great to chance? what would you fellas do? this is for a mild motor that will top out at about 6400prm
so the keith black pistons i was *hoping* to use weigh 514 grams apiece, as opposed to the current pistons weight of 541 grams.
so is that 27 gram differeance too great to chance? what would you fellas do? this is for a mild motor that will top out at about 6400prm
#5
thank you guys for the fast responses,
so the keith black pistons i was *hoping* to use weigh 514 grams apiece, as opposed to the current pistons weight of 541 grams.
so is that 27 gram differeance too great to chance? what would you fellas do? this is for a mild motor that will top out at about 6400prm
so the keith black pistons i was *hoping* to use weigh 514 grams apiece, as opposed to the current pistons weight of 541 grams.
so is that 27 gram differeance too great to chance? what would you fellas do? this is for a mild motor that will top out at about 6400prm
I think I once made a long post about this, you may want to do a search.
Rich
#8
-Dustin-
#9
My new pistons arrived yesterday and I was thinking just the same as the OP.
My old SRP 4.030 piston weighs 400 gr. + 131 gr. the pin.
New Ross 4.040 piston weighs 376 gr. + 120 gr. the pin. Even though the piston is bigger, all in all it weighs 35 gr. less.
So I won’t be balancing either.
Thanks for the info
My old SRP 4.030 piston weighs 400 gr. + 131 gr. the pin.
New Ross 4.040 piston weighs 376 gr. + 120 gr. the pin. Even though the piston is bigger, all in all it weighs 35 gr. less.
So I won’t be balancing either.
Thanks for the info
#10
#14
You can do it as long as its close in weight. What you could do too is if you get a piston that is slightly heavier for instance within 10 grams you could always take off weight off the piston to match up to what you already have.