Turbo Charging a Saw

[glens]

You're asking me?
You fully understand how they work, unless I'm thinking wrong (what are the odds?) they have to reduce the airbox vacume at least some, even if it's only on a level that could only be measured with a very expensive suck-a-scope.
Think of it as a air scoop on an old Trans-am.

Well, you <i>did</i> say they relieved airbox negative pressure. This very topic sparked a rather long thread in the not-too-distant past.

Okay, it was <a href="/showthread.php?t=10572" target="_blank">here</a> and in it, at post <a href="/showthread.php?p=107992#post107992" target="_blank">#47</a>, Crofter measured net a positive airbox pressure of 0.0135 PSI.

The thread also covered the meaning of the terminology behind "turbo".

Glen

 

[ehp]

if it was up to me and we were building a racesaw that there were no rules then I would use none of these sytems , I would use more carbs so I could use more nitro and more compression, maybe out west you guys can use what ever kind of carb you want but around here it has to be a chainsaw carb period and only 1 carb, man I can build a saw that would use 2 carbs and we would have tons of power ,

 

[KickingBack]

I just wonder?

but all you are is putting more air into the motor, nitro methane does the samething, it has oxygen in the fuel ,

The moment I read the above I had the idea of h2o2. Hydrogen peroxide. But not what you buy at the store but food grade that has no additives and is 35 percent not the 3 percent at stores. I have used it in medicineal (sp)purposes and growning purposes. I wonder if it would mix well in high octane gas and not cause anyother adverse effects. But then add a little dry gas and it would take away any moisture introduced. How much needed to produce results? You know I think I will try it. Tell ya all if I see anything. (hope it don't blow up or anything, gee maybe I won't be telling you anything about it? Oh No! Mommy!).

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KickingBack

 

[jason j ladue]

how bout NOS? just get completely nuts. would that work w/the 2-stroke?

 

[LJS]

Madsen's......Hmmmmmm?

Madsens blurb:
"At one time Madsen's was heavily into racing saws. We've played around with things such as "true" turbocharging and fuel injection as well as Nitro & Nitrous running saws. We keep a couple around so customers know we're knowledgeable about them, but due to increasing insurance costs and liability concerns we no longer produce them for customers."
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I've been racing up in there neck of the woods since the early 90's and have "never" seen them or any of there saws at a race. That doesn't mean they haven't played with a few of these things, but wouldn't you think they would of at least raced there shop saws if they were fast? I've never seen them try any stock saw chain racing either. So I really question there race saw building ability. I also heard that there Nitrous saw never did run right, but don't know for sure! LJS

 

[Al Smith]

Well,the hydrogen peroxide thing,is one part of a fuel mix we used for pulling tractors,very corrosive.It was the fuel for the MK 16 torpedo,at around 90 percent strength,very dangerous stuff.I don't know how well a saw engine could stand up to these corrosive properties.

 

[KickingBack]

Thanks

Hi Al;

Hey thanks for the info. Never had heard of it being done before, but then again, I've never been in the area of use (racing and such) to have heard of it. I find it interesting and would just say I would not have it at even close to that kind of concentration. (90%) I know what it does (35%) when it falls on things. Is strange the way it makes you fingers look. I had thought to start with about 6 drops to a quart of mix. Will run it in an old Poulan 4000AV I got. Real work horse saw that has taken a lot of abuse and still kicking well. But not used as much as use to be. But needing to run a 28 inch bar a little and think it is the best candidate to run it on. Will try the mix when I do. First without of course.

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KickingBack :

 

[Al Smith]

The H2O2 ,was only one part of the fuel mix,and it was 30 percent stuff.I never used it,but some of my buddies did."Hot farm stock" class,is the same as "stock appearing",in chainsaws.These guys were getting 65 hp,from a John Deere G.Back to the turbo thing.If I recall right,the IH,td 8,had a cold start position,wereby the engine was started,in natural aspiration mode,by shutting the waste gate to the turbo.This may an idea for a turbo-ed saw.It all goes back,however,to how does one keep the charge in the cylinder,without blowing right out the exhaust,which would be an exercise in futility.