How much oil to add to racing fuel

[Arden Cogar Jr.]

Quick question. I'm running my Rotax on racing gas and I'm under the impression I'm to run it at 32/1 ratio. By my calculations, that works out to about 8 ounces of oil for a gallon of racing fuel. Does that sound right?

all the best,
Arden Cogar Jr. aka Jamie

 

[rmihalek]

I'd say try 4 ounces of Maxima Castor 927 and then make up the remaining 4 ounces with propylene oxide. That'll give you a smooth burning 32:1 mixture.

 

[ehp]

Nice try Jamie , but I know you are alot smarter than that,
128 divided by 32 = 4 correct, so 4 oz. of oil per gallon.


If you donot know Arden Cogar jr. is well he is one of the top axemen in WORLD, has many world records, and is one big mother so donot piss him off

 

[EDMman]

128 oz. divided by 32 = 4 oz. thus 4 oz. oil to 1 gal. of gas. 32/1

 

[Arden Cogar Jr.]

Thanks a million guys. I'm not the most sophisticated when it comes to mixing fuel as I normally rely upon others to do it for me. Can you imagine how rich that darn thing would have ran if I would have added 8 ounces to a gallon of racing fuel. I don't even wanna think about it. To go a little further, I will profess my ignorance of not knowing there was 128 ounces in a gallon of fuel. So I've learned a lot today. Thanks a million.

All the best,
Jamie

 

[ehp]

Jamie what are you using for racing gas , C14 or C18 ?

 

[Arden Cogar Jr.]

That's a new one on me Ed. I'll call the folks where I got it and get back to you guys. Thanks a million,
Jamie

 

[rmihalek]

Oh yeah, EHP, I definitely know of Arden Cogar Jr and have seen him on TV competing. I figured he must've been pulling our collective legs with the 32:1 question so I gave a bit of a wise-a$$ answer. If he decides to hang out here, I'm sure we'll learn as much from him as he learns from us, and why wouldn't he?

 

[Arden Cogar Jr.]

rmihalek,
No leg pulling here. In order to pull a leg, I'd have to have a leg to stand on, if you get my meaning? I'm seriously interested in learning more about chainsaws as I'm a newbie to their operation. I've been around them all my life, but never understood how they worked or what made them work. I worked in the woods with my father before I went off to school and never had to file a chain, change a chain on a saw, etc. I fueled/oiled it up and went about my business. Dad always did the same with the competition saws even though he doesn't know that much about the engines. My father's not around as much these days and I find myself at a loss in regards to tuning in my carb, making my fuel, stoning my chains, etc. But I'm learning and I'll take any advice at the risk of either sounding stupid or gullable. I honestly don't know any better.

Now ask me a question about an axe and I can probably answer it. Same goes for a chopping or sawing techniques. But hot saws is a new passion for me and I want to learn as much as I can so I won't be totally helpless should something happen.

For example, with the work done by D&D on my saw with a 48mm carb, I could make two screaming cuts but die on the third. I couldn't figure out what was wrong. I guessed that the saw was too lean, so I richened the low end and turned the needle valve out - so the carb would get more fuel. It screamed even better for the first two cuts, but still died on the third. Later, Melvin Lentz and Richard Jordan noticed that my saw didn't have an external fuel pump and deduced that was the problem with the engine making the third cut. A gravity fed carb simply wouldn't work in the manner we need it to. Melvin luckily had one in his tool box and we spend ten minutes cutting and clamping, etc. to get the pump on the engine. The saw started and it made three cuts, but it was way wicked rich. I then leaned it out a full turn on the needle and two turns on the low end. That was too much as the ???? thing wouldn't start when the race came because of lack of fuel. It eventually started and I made three crappy cuts in something like 59 seconds.

Now, I'm trying to get the darn thing running before the Sthil Finals. Boy, it's caused me nothing but grief, but I will understand what the heck it takes to get it to run. I'm going to richen it a 1/2 turn and one turn in the low end tonight with the little fuel I have left with the hope that it helps. Well see and I'll definitely write about it as I need to vent when it comes to hot saw operation - as I'm not confident in my saw's ability. I'm an average operator, but right now the operator's ability to make the saw work sucks. If that makes any sense?

Vent over, sorry. There were moments over the past three weeks that every word out of my mouth, while working on this saw, was of the four lettered variety. Further, I thought I was going to give up my toaist beliefs because of the anger I felt toward a piece of machinery. A weaker man would have grabbed it by the pipe and flung it as far as he could, but when you're talking about a $5k investment into a chainsaw you tend to treat it with kid gloves......aghhhhhhhhhhhhhhhh

Okay, I'm better now. I'll find out about the fuel shortly.

All the best,
Jamie

 

[rmihalek]

Okay Jamie, I see. Sorry for the silly answer at the start of the thread. One of the hardest things for me to get used to on the internet is the lack of context in the words people type. The words are just there in black and white with no indication as to the context.

 

[Arden Cogar Jr.]

Bob,
Absolutely no offense taken. I'm here to learn so I won't screw up as much as I have in the past. I love competing in chainsaw racing events, but I really don't know what the heck's going on, if that makes any sense?

I have to say that I was pretty depressed this morning up until I wrote the long winded post above. Now, I feel better and can actually work. Strange how things brighten you day. I guess everyone needs to ????? once in a while.

All the best,
Jamie

 

[ehp]

Jamie , did you put a fuel pump on your saw , and it didnot have one before , did you change the needle and seat in the carb


if not you have to cause with a fuel pump putting pressure on the needle that was made for normal pressure it will flood and stay open on you

 

[Arden Cogar Jr.]

Ed, I did not change the needle and seat in the carb. Melvin mentioned this as he thought it would take a smaller needle because of the presence of the fuel pump.

I'll D&D right now and see if they can over night me the needle that would afford for the fuel pump. Thanks for telling me. Otherwise, I would have wasted fuel and time trying to make the darn thing work.

Thanks a million

Jamie

 

[ehp]

Then you are going to have to rejet that carb , is it a Mikuni
Super BN, that you have on it, the 2 jets on the outside of the carb <low and high > on this style of carb only adjust 25 % of your fuel,

Jamie if you have that style carb, if it was me ,put it back to where it was before , open your high speed jet out more now if you are out more than 3 turns you need to change the high speed jet that is inside your carb , it will have a number on it and you need a bigger numbered jet , by 2.5 or go 5 bigger on the number

 

[Arden Cogar Jr.]

Ed,
it's a lectron carb that I believe that is made by D&D. I just got off the phone with their tech person who basically confirmed what you said - the fuel pump will cause the engine to flood if the needle and seat aren't compatable with the amount of fuel coming to the carb.

Am I making any sense. They're sending me the other needle and seat which is smaller which is what David Bolstad told me I'd probably need.

God help me. Yikes

all the best,
Jamie

 

[Arden Cogar Jr.]

Ed,
Boy this is getting complicated. The place I can get fuel at has "red" "c12" "u2" and "u4" He also has "one can" of c14. What's your thoughts on this? Any help would be much appreciated.

All the best,
Jamie

 

[ehp]

Jamie we have been down that road about 2 years ago, trying different fuels in Woodland's rotax,
what do i think of them , well we tried the c12 and c14 , both worked very good once you were dailed in on the jetting BUT and i mean BUT , they didnot cut any faster and had to be jetted steady, every 10 or 15 degrees you had to reset it to make it run right on.

i will send you what we are running for fuel , you will laugh , Gaston and Moyal, Donald are all running the same , well that is if Gaston would leave the nitro out of it

 

[Arden Cogar Jr.]

How soon can you get it to me and where can I send you a check. I'm gonna call you later tonight. Thanks a million Ed!!!

I'd love to try it this weekend if possible.

All the best,
Jamie

 

[ccicora]

Ok Jamie, I see I have created a writing machine animal! You said you like sawing??? How about the bowsaw??? I just had to ask. Ed has done some exstensive work with the rotaxes and I would spend the time on the phone with him. Oh and during the talk you might even inquire about a 3120 Pipe saw and a 7900 Muffler to run for your show. I placed 10th with a 372 woods saw that was thrown together the Wed and Thursday night before (from Dan). Oh and I ran Gas.

Next Show Andies, NY Sept. 5th

Later,
Chris

 

[dozerdan]

Arden Cogar Jr.
Just wanted to welcome you to AS. Its always nice to have good people on here. I think that I saw you at Mackeyville but I didn't get the opportunity to talk with you. Maybe next time.

Chris
10th ??? It should have been 7th or 8th. I figure that it was due to operator error. LOL

Later
Dan