How did you come up with 125? Is that same amount you take from exhaust roof. 6 degree
Just trying to learn. Not questioning your work by any means.
It's got nothing to do with it.
Where one sets the transfers is one of the most difficult questions to answer. Transfers are the black magic of porting. Most pick numbers based on what's worked well before, and go from there.
When a saw is unknown, it's a whole notha story. You try to figure out what the factory gave you, try to figure out why they did it that way, and you go from there. The OEMs don't pick numbers that won't make a saw run, they try to balance fuel economy, emissions, durability and performance. We just trade one for the other.
To determine where to set a transfer, many inter-related things must be examined. Blowdown, the shape of the exhaust port, the restriction of the exhaust port, the number of transfers, the size and volume of the transfers, the case volume, the intake port closing degree, etc....
The reason you can't find the simple answer you are looking for is because one doesn't exist.
I'm not trying to be disrespectful to you. Hope I'm not coming off like that.
And yes, Miller and Red97 did great jobs here.
