someguy2800
New Member
Hi all,
I have a big white oak about 30" diameter at the base die on my property this summer. In order to fell it I was going to need to drop it across my neighbors property line into his yard. He also burns wood so I called him yesterday and asked if he wanted to help cut it and we would split the wood 50/50 so he came over after work and we cut it. He has a factory stock Husqvarna 390xp he bought new about 3 years ago and I have an old home depot Makita 6400 rental saw that I put a 84cc big bore kit and ported. We were both impressed with how fast these two saws cut so we decided to do a head to head race and see. We set up on opposite sides from each other about 10 feet up the stump where it was about 20"x24" thick and counted off. He finished and I still had 3 inches left. I would say the husky was a good 10% faster.
As I said his saw is a stock 390 husky with a 22" bar. My makita had a 20" bar on it. It has a 84cc big bore piston from ebay and I did a mild port job on it when I built it and opened up the muffler just a tiny bit. My chain was getting pretty dull at the time from all the dirt in the bark but his was probably about the same. The only thing I did on the muffler on mine was to open the outlet about 50% and take the screen off. The compression is stock and it still has a gasket under the cylinder so compression is pretty low.
Just wanted to share the info. Pictures of my porting below
before
after
before
after
before
after
stock cylinder vs big bore
I have a big white oak about 30" diameter at the base die on my property this summer. In order to fell it I was going to need to drop it across my neighbors property line into his yard. He also burns wood so I called him yesterday and asked if he wanted to help cut it and we would split the wood 50/50 so he came over after work and we cut it. He has a factory stock Husqvarna 390xp he bought new about 3 years ago and I have an old home depot Makita 6400 rental saw that I put a 84cc big bore kit and ported. We were both impressed with how fast these two saws cut so we decided to do a head to head race and see. We set up on opposite sides from each other about 10 feet up the stump where it was about 20"x24" thick and counted off. He finished and I still had 3 inches left. I would say the husky was a good 10% faster.
As I said his saw is a stock 390 husky with a 22" bar. My makita had a 20" bar on it. It has a 84cc big bore piston from ebay and I did a mild port job on it when I built it and opened up the muffler just a tiny bit. My chain was getting pretty dull at the time from all the dirt in the bark but his was probably about the same. The only thing I did on the muffler on mine was to open the outlet about 50% and take the screen off. The compression is stock and it still has a gasket under the cylinder so compression is pretty low.
Just wanted to share the info. Pictures of my porting below
before
after
before
after
before
after
stock cylinder vs big bore
