Rotor Weight and Spotted Iron
#1
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Rotor Weight and Spotted Iron
Hey guys,
I am rebuilding a 13BT for the first time. I was spec-ing it out yesterday and have a couple questions:
1- The original rotor was scrapped after it blew the seals. I got another one with the same weight stamp "D". The difference in weight between the two is 55 grams. Is that OK to use or will it after to be balanced?
2- I noticed a big spot or chunk missing out of the front iron next on the coolant passage (see pics below). What caused this? Can I use this for the rebuild?
Thanks.
I am rebuilding a 13BT for the first time. I was spec-ing it out yesterday and have a couple questions:
1- The original rotor was scrapped after it blew the seals. I got another one with the same weight stamp "D". The difference in weight between the two is 55 grams. Is that OK to use or will it after to be balanced?
2- I noticed a big spot or chunk missing out of the front iron next on the coolant passage (see pics below). What caused this? Can I use this for the rebuild?
Thanks.
#2
Urban Combat Vet
iTrader: (16)
Not a builder so consider this as much of a bump to the top as any thing but....IIRC you can be off one letter either way on weight. So you should be OK if they're both the same and both from a tubo engine.
It looks like a casting flaw between the coolant seal grooves. Is that what your referring to? If so and it does intrude into a groove and is not raised I think your OK there too.
It looks like a casting flaw between the coolant seal grooves. Is that what your referring to? If so and it does intrude into a groove and is not raised I think your OK there too.
#3
I would double check your rotor to make sure it is a duplicate sounds like its way out for weight balance ., check out the Pineapple Racing video about rotor weights..........the.damaged water jacket piece is usually caused bye a slight core shift which leaves a small casting on one side of the Iron to support the compression seal.. under heavy use or abuse,or (overheating, plugged cat,etc they can crack and blow out, allowing compression to leak into the water jacket and force out your coolant.. Toss out the broken one,it's.Time for another Iron ..........
#4
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I would double check your rotor to make sure it is a duplicate sounds like its way out for weight balance ., check out the Pineapple Racing video about rotor weights..........the.damaged water jacket piece is usually caused bye a slight core shift which leaves a small casting on one side of the Iron to support the compression seal.. under heavy use or abuse,or (overheating, plugged cat,etc they can crack and blow out, allowing compression to leak into the water jacket and force out your coolant.. Toss out the broken one,it's.Time for another Iron ..........
#6
Sharp Claws
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i don't see anything wrong with that iron, and the rotor will be fine if it is letter matched. yes there is variances in weight but 55grams is nothing world crashing for a rotary engine. if the engine is being built for over 9k RPMs then yes, it should be balanced otherwise leave it alone.
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#8
After having another look(must have had my glasses upside down) as long as there is no damage to the water jacket seal or comp seal and the casting is lower than the Rotor housing face it should be fine..sorry for the scare...
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#12
Sharp Claws
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if it is a stock iron then you should just find a replacement. if it is a ported iron and you want to save it or an iron that is difficult to replace like an RE cosmo iron then they can be repaired. i do sell sleeves for broken irons but still recommend repairing the break and is something i can do for $100 per break. the iron seal sleeve set and coolant seal set is $165.
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