Frank Rizzo
Custom Saw Modification 241c-441c,660 specialist
What makes you think that the ported Saw won’t gain from break-in also ? If the Saw achieves a 15% gain by performing intake and exhaust mods over stock cut for cut I fail to see the logic ??? I can show you a video of a broken-in 362c that’s hot-woods ported that is nipping at the heels of a new 462 in the same log ... 59cc vs 72.2cc ... approximately 27% faster cut time than a stock saw ( both with stock chain )with a heckuva lot more torque ... Now I can “chain” the modded Saw because it’s got the stones to pull it whereas the stock saw will stall when dogged -in ..and cut even quicker !!!. I’m shootin for a 25-30% gain on the 462c over stock ...True but nobody does that to my knowledge. Husquavarna would say 1 hour to seat the ring and 10 hours on the bottom end. A get a couple 51.4 mm 75 cm3 jugs from Mike Lee and the first saw had a broken in bottom end and took 10 days to break those rings in where the saw fully kicked up. shortly after my second chain.
Comparrissons with the R&D are from one cut to the next so should be pretty good. maybe some changes respond better in smaller wood IDK? The same could be said about changes differing with a fully broken in or not saw IDK?
Ok your point is you take two new saws and they both time 10sec in a cut. one saw goes through X hours of r&d and the stock saw cuts the same volume with also about X hours and remaining stock. The mod saw can now cut that same 'pre mod' log in 8 sec whilst the stock saw has broken in and can now do it in 9 sec.
Math:
Builder then claims a 20% time gain
Meh
but the stock had a 10% gain so that's a 10% gain in the mod saw (in my scenerio )
The only saw we can compare it to is the 372 with 5.4 hp 70.9 cc VS 462 with 70cc 6 ph
10% of 5.4 hp is .54 + 5.4 = 5.94 hp.
So the 462 has 10.5% ph more than the 372 we will say.
So the factory has 'found 10.5 % more hp gains'. That may transfer nothing in the cut or quite a bit in others. Time gains are subjective.
A fast 6 ph would do a lot for most guys. porting would be a waste.
A true 15-16 % hp gain. would give you about 7 hp. That would just work for the
coast but time gain percentage does not mean ****. too subjective. HP can be measured as a constant.