New Pistons around 3Grams lighter Re Balance?
#1
10 Second Club
Thread Starter
New Pistons around 3Grams lighter Re Balance?
Hi Guys,
I'm changing from Mahle to JE because i have got to go from 4.070 to 4.085.
I can get the JE to roughly 3 Grams LIGHTER with a HEAVIER wrist pin, after speaking with JE today, I dont know what the ring pack of the JE pistons weigh, but assuming thats about as close as i get, do you need to re balance?
If so at what point do we say thats close enough 1 gram, 0.5 grams??
I'm changing from Mahle to JE because i have got to go from 4.070 to 4.085.
I can get the JE to roughly 3 Grams LIGHTER with a HEAVIER wrist pin, after speaking with JE today, I dont know what the ring pack of the JE pistons weigh, but assuming thats about as close as i get, do you need to re balance?
If so at what point do we say thats close enough 1 gram, 0.5 grams??
#2
Moderator
iTrader: (20)
Hi Guys,
I'm changing from Mahle to JE because i have got to go from 4.070 to 4.085.
I can get the JE to roughly 3 Grams LIGHTER with a HEAVIER wrist pin, after speaking with JE today, I dont know what the ring pack of the JE pistons weigh, but assuming thats about as close as i get, do you need to re balance?
If so at what point do we say thats close enough 1 gram, 0.5 grams??
I'm changing from Mahle to JE because i have got to go from 4.070 to 4.085.
I can get the JE to roughly 3 Grams LIGHTER with a HEAVIER wrist pin, after speaking with JE today, I dont know what the ring pack of the JE pistons weigh, but assuming thats about as close as i get, do you need to re balance?
If so at what point do we say thats close enough 1 gram, 0.5 grams??
#5
FormerVendor
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Engine Bob Weight + Overbalance %
Hi TVR, LEAVE IT as Overbalance is a GOOD thing.
Your BW is could be 1825-1835 ?
DO the MATH, let us all here KNOW the weights, then we can calculate.
I have ALWAYS heard that a Pound in England is greater in value than if in the states.
You must "match" the rod/piston with pin weights to each other.
As for the GTO "tech" I OVERBALANCE with a GREATER % as RPM is increased.
Lance
Your BW is could be 1825-1835 ?
DO the MATH, let us all here KNOW the weights, then we can calculate.
I have ALWAYS heard that a Pound in England is greater in value than if in the states.
You must "match" the rod/piston with pin weights to each other.
As for the GTO "tech" I OVERBALANCE with a GREATER % as RPM is increased.
Lance
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#9
FormerVendor
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Crankshaft Acceleration Measurement
Hi Cole, thanks for kind words, yes with MY ECU, I can measure Crankshaft Acceleration.
This ECU-882C can graph the vibration of the crankshaft.
Now for TVR, I was taught about "overbalance" by the likes of Roger Bailey, Mike Costin, and Brian Hart. (Englishmen)
Lance
This ECU-882C can graph the vibration of the crankshaft.
Now for TVR, I was taught about "overbalance" by the likes of Roger Bailey, Mike Costin, and Brian Hart. (Englishmen)
Lance