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The web link below has Flat 6 Innovations stating that they "weld and/ or pin every sprocket and drive. Overkill does not exist when I assemble one."

https://rennlist.com/forums/996-forum/928373-has-anyone-had-their-ims-gears-welded.html

 

My M96  IMS shaft has the larger sprocket pinned and 3 weld points on the two smaller sprockets. Each weld length is pretty much equal and spaced roughly equally around the sprocket circumferences

What is not clear is whether or not the shaft would need to be balanced after the tig welds are  applied.

 

I intend to use the LN Engineering IMS Solution bearing. Not sure if that would make a difference as to whether the shaft should be balanced after welding or not ?

 

Your expert advice would be very much appreciated.

Thanks

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6 hours ago, tony z said:

The web link below has Flat 6 Innovations stating that they "weld and/ or pin every sprocket and drive. Overkill does not exist when I assemble one."

https://rennlist.com/forums/996-forum/928373-has-anyone-had-their-ims-gears-welded.html

 

My M96  IMS shaft has the larger sprocket pinned and 3 weld points on the two smaller sprockets. Each weld length is pretty much equal and spaced roughly equally around the sprocket circumferences

What is not clear is whether or not the shaft would need to be balanced after the tig welds are  applied.

 

I intend to use the LN Engineering IMS Solution bearing. Not sure if that would make a difference as to whether the shaft should be balanced after welding or not ?

 

Your expert advice would be very much appreciated.

Thanks

 

It would not hurt to at least check the balance; "equal length welds' are often very different in weight.

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It's certainly a good/fair question. FSI tends to be extremely attentive to detail. I doubt something as simple as this would get by them - I know when they do a Stage II rebuild they check/balance all the turning masses (crank, fly-wheel, etc.). I'm sure they'd be willing to give you a definitive answer if you give them a call.

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To complete the loop. I had it checked for balance and it was near perfect. Thanks for your advice.

 

I now on to installing the new timing chain guide rails. Unfortunately Its been such a long time that I cant remember the orientation of the two rails which have two retaining bolts. I have two new rails so I know which cylinder banks (1-3 and 4-6) they are supposed to go in.

 

I presume the most tapered end of each rail which has the oval bolt hole should be inserted towards the crankshaft ?

 

cheers 

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