Porting my trimmer

[jughead500]

Well i found a 260 and was approved for credit for it.just waiting for a rep to contact me.

 

[Fly By Night]

That's the pfl correct jug head? Iirc they made a regular 260 also

 

[Fly By Night]

You guys reminded me of this video I had watched before, it makes sense now. Before I was wondering why I was swirling around underneath the jug.


That makes sense chris. I would think making the exhaust wider/maybe taller would reduce the amount of exhaust displacing your charge?

 

[jughead500]

Yeap a pfl model.just got to add enough to the order to bring it to $500 to get it financed.

 

[Fly By Night]

What are they going for these days? At one point they were hovring around the $500 mark. It sounds like you might need a new leaf blower too!

 

[jughead500]

This company has them for $385 + $12.50 shipping. Added a root assasin shovel/saw for the zombie apocalypse and a few other things still only got it to $483 with shipping. guess ill have to get 5000 more feet of trimmer line in .095 already have .120 for the 340 and .130 for the fs250.

 

[jughead500]

Oh already have two stihl bg86 handheld blowers and a brand new husky bts580.right now ive got more in equipment than im making.got to get rid of some saws or something.

 

[Mastermind]

What are they going for these days? At one point they were hovring around the $500 mark. It sounds like you might need a new leaf blower too!

Finished up your 460........it's now blowing 225psi. Should be great at 6500 ft.

 

[Fly By Night]

Is 225 even enough compression to run? [emoji14] thanks for doing that I really appreciate it! Like alot


While you are here, do you have any thoughts on how to make my trimmer faster?

 

[Mastermind]

Muffler mod?

 

[Fly By Night]

Done deal

 

[LegDeLimber]

Thanks for the rest of the pihotos of the lower end of that motor.

My vote is for doing the basic matching of gasket points of the parts.
the smoothing of flow from reducing the slight mismatches of things.
I'd say study a litle mor eeon how trhat entir trandfer sytem works.
then decids if re-routing is a wise ide or not.
the piston skirt wall and lowr clyinder tranfers interfaceare a defint thing to be very awre of

That sump passage is an intersting thing! oughta be a darned good scavenge there.
bet it can run at moderate (2/3?) throttle around the flowers but then turn it on side
to shrap edge something and you probbably don't get that 30 sec of richness from the bottom end being a little bit loaded up with lube/fuel ?
=
p.s. migraine headaches suck.
and i'm still a bit foggy with from this cluster of em

 

[Chris-PA]

Thanks for the rest of the pihotos of the lower end of that motor.

My vote is for doing the basic matching of gasket points of the parts.
the smoothing of flow from reducing the slight mismatches of things.
I'd say study a litle mor eeon how trhat entir trandfer sytem works.
then decids if re-routing is a wise ide or not.
the piston skirt wall and lowr clyinder tranfers interfaceare a defint thing to be very awre of

That sump passage is an intersting thing! oughta be a darned good scavenge there.
bet it can run at moderate (2/3?) throttle around the flowers but then turn it on side
to shrap edge something and you probbably don't get that 30 sec of richness from the bottom end being a little bit loaded up with lube/fuel ?
=
p.s. migraine headaches suck.
and i'm still a bit foggy with from this cluster of em

Dang - I hope you feel better soon!

 

[Fly By Night]

I hope you feel better limber. I can't say I've noticed a trimmer running rich on its side but I also keep mine in the full upright and locked position and don't use it as a stick edger.

What do you guys think about cutting the gasket between the cases in the supply duct so it's not dividing the duct into 2 smaller passages? I'd think that would help remove some restriction. I've thought about ways to help transition the charge 90* at the bottom of the cylinder, either by cutting a relief on the inner radius or by making a jb weld divider. it looks a little thin to grind the radius and I'm not sure I have the real estate to make a divider without choking things down too much.

 

[Chris-PA]

It would not be difficult to cut the fence out that divides the transfers from the case, and to cut notches in the piston skirt on each side to match. The rest could just be left there. I'd want to know what the port timing numbers were first, especially the blowdown angle.

I'd probably keep the system intact though if it runs OK, just because it's different. The cat would probably go though.

 

[KingDavey]

Seems like this one has good power.

 

[Fly By Night]

I've thought about that chris, I guess a first step would be to see what a new top end costs if I trash it. if I cut out the fence I would probably plug either end of the ducts to keep crank case volume as low as possible.

When i was pulling my top end apart I accidently dropped my muffler and the cat fell out and all of the holes got enlarged, oops clumsy me.

I gasket matched everything tonight, nothing was too far off, I'm not expecting anything too nuts out of that.

Thanks for the video Davey, that husky has an additude! Is that as member? Something about the cookies laying around gives me this sneaking suspicion.

 

[jughead500]

One that i'm really wanting to build is a husky 326l i have several laying around.

 

[Mastermind]

That is Mitch Weber........

 

[Trx250r180]

That is Mitch Weber........

The tall guy or the midget ?