Turbo Charging a Saw

[klickitatsacket]

Has any one you know ever Turbo charged a saw? I was talking with a guy this morning and this idea popped up and thought I would ask you guys.

 

[tree monkey]

thought about it

 

[glens]

You'd need a forced lube system to keep the turbine bearings happy, I'd think.

 

[bottlefed89]

No, but I saw one of those gas powered 2stroke scooters that someone had put a turbo on. I don't really know if it was even any faster, but it sounded cool, as most things turbocharged do....

 

[Oregon_Native]

turbo charger or super charger? maby both?

you might get a way with one an a large displacement saw

as for the turbo you would need one with ceramic bearings an a oiling system run off the saw

any one thought about a 4 stroke saw some company makes one that oils like a 2 stroke but runs like a 4 stroke

 

[Timothy]

how come noone's putting a fan device on the clutch side for cooling?

 

[Crofter]

Here is a no moving parts supercharger for my saw

 

[njforestfire]

Crofter, where can i get a pipe like that? Does it really make that much of a difference on a stock saw?

 

[Chopwood]

Here is a no moving parts supercharger for my saw

Right on Crofter!

 

[Crofter]

NJ
I don't know how much difference it would make on a stock saw, maybe only 15 percent.On a modified it is around 30 percent or more. You have to get the saw able to put extra charge thru then punch it back in just before the exhaust closes. My 372 is EHP modified and the pipe is his design knowing the operating rpm of the saw and the port timing. A pipe is pretty specific to the particular saw.You need the saw to fit the header sweep to clear chain brake etc. so it is not a simple do. If all the dimensions are not correct, you have a pig with lipstick. EHP is the man for the real info though!

 

[glens]

How about Husqvarna's "Air Injection" system?  Isn't that like a turbo?  Yeah, it must be, since Jonsered calls it that!  Why do you guys always want to re-invent the wheel?

 

[Chopwood]

How about Husqvarna's "Air Injection" system?  Isn't that like a turbo?  Yeah, it must be, since Jonsered calls it that!  Why do you guys always want to re-invent the wheel?

Because if we stopped at the first generation of the wheel, we'd all be riding unicycles.

 

[Crofter]

Glen and Chopwood; you guys just being silli I think, go cut some wood. Too cold for me out there today. Told the wife that if she wants me to keep that stove going she better get out and haul some more into the house. Being a good union man and an operating engineer, I dont want to take the teamsters work!

 

[Chopwood]

Crofter-
Sounds like you got a pretty good woman there. I like to stir a little bit. If you notice, friday mornings get a lot of activity from me. My work week ends at 6:30 friday morning, so that's when the beer starts flowin'. Going up to Oswego,NY Steelhead fishing, so I figured I'd stir the pot before I left. BTW- it's -6f right now, not bad for you northern boys, but that's tough around here, still going fishing!

 

[rb_in_va]

If we had -6F here in Virginia, they would probably cancel school and some businesses.

 

[Crofter]

I did kind of derail this thread. Some large two strokes are supercharged with turbo or crank driven devices but I think weight and reliabilty issues plus cost rule it out for a saw. Also the limiting factor to a saw is getting rid of the heat and keeping the piston temperature down. You really cant take much more horsepower out of it without running into problems. I feel that with modified saws you have to use a bit more finesse than brute strength and awkwardness. I doubt I could use my 260 Stihl the way I used to force the old Homelights and Makkkalas!

 

[Ranchero50]

Crofter, your pipe in it's own special way is a supercharger. A turbo works off of heat and pressure expansion in the exhaust port. On my old twin turbo 351w Capri setup I would measure 50psi of exhaust backpressure at 15psi of intake pressure with the waste gates dissconnected and one 20pri of backpressure at 6psi of intake pressure withthe wastegates dumping excess pressure.

Jamie

 

[Crofter]

Ranchero, that would have been a hot little Capri. Without the wastegate you could literally tear the engine apart. My 260 EHP piped will outcut a stock 066 but only momentarily. You just cannot sustain that kind of output without running into heat problems. It does put on quite a show against a totally stock saw with factory round ground chain. The sound effects are wild too.

 

[Mange]

I thought that the concept " Turbo " meant over pressure on the carb/ intake side. How the +pressure is developed is that important?

 

[glens]

"Turbo" means utilizing an exhaust-gas-driven turbine to supercharge the intake.  A crankshaft-driven compressor is called a "supercharger" or "blower", versus a "turbocharger", over here.