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Is it Possible?

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Is it Possible?

Post  microflitedude on Mon Aug 27, 2012 4:15 pm

I have 3 quarts of Traxxas 20% Nitro car fuel. Is there any way I can find out how much castor to add for Cox use? A Nitro RC truck was given to me a while ago, but the engine called it quits shortly after.

It will only tell you the the nitro percent: 20. I am guessing it contains around 12% synthetic oil, the rest being methanol and other chemicals. Would guessing the amount of castor be too dangerous?

I hate to see it go to waste. I can't sell it, and methanol is collecting on the inside of the bottles.I might just have to give it away. I fed some to a Testors Pipe Bomb once, (once, never again) and it ran GREAT, with higher RPM than I thought possible. Probably due to there being such little oil.

Thanks in advance, Matt.
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Re: Is it Possible?

Post  Admin on Mon Aug 27, 2012 4:28 pm

I was talking to a guy who called Traxxas and asked about the oil content, they refused to tell him as it is a protected secret formula. I would like to know as well.

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Re: Is it Possible?

Post  Admin on Mon Aug 27, 2012 4:33 pm

16% according to this forum> http://www.radiocontrolzone.com/showthread.php?t=180290 go down to post #8.

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Re: Is it Possible?

Post  microflitedude on Mon Aug 27, 2012 8:29 pm

I need to add 1.5 ounces of castor to bring the oil up to 20%.

Thanks Jacob!
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Re: Is it Possible?

Post  RknRusty on Mon Aug 27, 2012 8:31 pm

Did they say the 16% in that fuel was castor oil? Castor/synthetic blend should be half castor, iirc.

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Re: Is it Possible?

Post  microflitedude on Mon Aug 27, 2012 8:36 pm

RknRusty wrote:Did they say the 16% in that fuel was castor oil? Castor/synthetic blend should be half castor, iirc.

Good point... I'm not sure. Most fuels have a small bit of castor, but there is no way to be sure I guess. I may have to designate an .049 guinea pig. Smile

There is no way it will run with 32% oil. Very Happy
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Re: Is it Possible?

Post  RknRusty on Mon Aug 27, 2012 8:49 pm

The best way to test it is to press it into service rather than some bench runs. I'm guessing the ball socket is probably where it will fail, if not the compression. The crank and drive pin should be perfectly happy with synthetic. It's slicker and those areas aren't so hot as to require castor. It'll probably be unusually fast until it slags.

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Re: Is it Possible?

Post  Mark Boesen on Mon Aug 27, 2012 9:08 pm

years ago (old fart voice) i read in PAMPA about somebody using a long thin glass tube, mounted vertical, marked off in 10% increments, set out in the sun to let nitro & alcohol evaporate. I made a similar set up with a thin 10" plastic tubing glued to a piece of 2'x4'' after a couple days there was about 20% left from the original 100%
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Re: Is it Possible?

Post  dckrsn on Mon Aug 27, 2012 9:24 pm

Mark Boesen wrote:years ago (old fart voice) i read in PAMPA about somebody using a long thin glass tube, mounted vertical, marked off in 10% increments, set out in the sun to let nitro & alcohol evaporate. I made a similar set up with a thin 10" plastic tubing glued to a piece of 2'x4'' after a couple days there was about 20% left from the original 100%
Makes sense to me Mark.
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Re: Is it Possible?

Post  RknRusty on Mon Aug 27, 2012 9:36 pm

Mark Boesen wrote:years ago (old fart voice) i read in PAMPA about somebody using a long thin glass tube, mounted vertical, marked off in 10% increments, set out in the sun to let nitro & alcohol evaporate. I made a similar set up with a thin 10" plastic tubing glued to a piece of 2'x4'' after a couple days there was about 20% left from the original 100%

You can imagine my distress a couple of weeks ago when I opened up the shop after playing with my Big Mig the previous day, and there stood my bottle of fuel on the table with no cap on it. Luckily we were having cool snap and the temp was only in the 70s and 80s.

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Re: Is it Possible?

Post  Mark Boesen on Mon Aug 27, 2012 10:40 pm

just think to yourself, you were raising the oil percentage...
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Re: Is it Possible?

Post  RknRusty on Mon Aug 27, 2012 10:46 pm

Mark Boesen wrote:just think to yourself, you were raising the oil percentage...
I tried to think that, but I couldn't help thinking of the methanol taking on water in the 80% humidity. It still runs fine and I only have 2 ounces left now. Between breaking-in the Big Mig and flying the fleet last weekend, I've been binging on fuel.

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Re: Is it Possible?

Post  PV Pilot on Tue Aug 28, 2012 10:08 am

Admin wrote:16% according to this forum> http://www.radiocontrolzone.com/showthread.php?t=180290 go down to post #8.

Traxxas fuel is 16%, and as per the Traxxas rep that I spoke to at a big nationals race, it is a 50/50 castor synthetic blend. It is a proprietary secret for most fuel companys as to the blends they use, but I would shy away from any fuel that does not at least put the total oil content right on the bottle or website. I raced offroad for years, and asked many questions about oil content to anyone who would listen and answer. The more oil your engine gargles, the more it is going to slow the rpms down. You get to a point to where you need that oil for engine life, so it is a fine line. Offroad fuel has LARGE quantities of anitfoam in it. I would pull about 1% of needed oil out of the equasion, you should be just fine. If the fuel has set for awhile, it has already oiled up a bit more, just from setting and slow evaporation.
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Re: Is it Possible?

Post  microflitedude on Tue Aug 28, 2012 10:24 am

Then it should be just fine once I add some castor? The antifoam will be good for my Swamp Buggy.

Thanks guys.
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Re: Is it Possible?

Post  PV Pilot on Tue Aug 28, 2012 10:43 am

microflitedude wrote:I hate to see it go to waste. I can't sell it, and methanol is collecting on the inside of the bottles..

Thats not methanol collecting on the inside walls of the jug Matt, it is condensation/water droplets from a greenhouse effect with those clear Traxxas jugs.

It's to expensive to waste as you posted, just back off 1% on your needed oil equasion for the remix and use it. Money is hard to come by these days so use it up. Offroad fuel has, along with lots of antifoam, has anti shear additives which is a lubricant in unto itelf in a way. Thats why I post to back off 1% and you should be just fine with it.
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Re: Is it Possible?

Post  microflitedude on Wed Aug 29, 2012 3:39 pm

I mixed 1.4 ounces into a quart of the stuff. I'll try running it in my .010 when my new clip arrives.
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Re: Is it Possible?

Post  WingingIt74 on Wed Aug 29, 2012 4:02 pm

I wish you were closer, I'd buy them. My son is getting a T-maxx that he doesn't know about yet.

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Re: Is it Possible?

Post  RknRusty on Wed Aug 29, 2012 4:21 pm

microflitedude wrote:I mixed 1.4 ounces into a quart of the stuff. I'll try running it in my .010 when my new clip arrives.
Really, isn't an .010 kinda special? I'll give you a Bee to run it in. I'd rather see you slag a Bee than an .010.

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Re: Is it Possible?

Post  microflitedude on Wed Aug 29, 2012 4:25 pm

RknRusty wrote:
microflitedude wrote:I mixed 1.4 ounces into a quart of the stuff. I'll try running it in my .010 when my new clip arrives.
Really, isn't an .010 kinda special? I'll give you a Bee to run it in. I'd rather see you slag a Bee than an .010.

I thought it might be a good idea because it is much quieter; but you are right. I have a surestart I could run it in, but It's too loud for where I am. Mad
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re: run-in

Post  happydad on Wed Aug 29, 2012 6:01 pm

microflitedude wrote:
RknRusty wrote:
microflitedude wrote:I mixed 1.4 ounces into a quart of the stuff. I'll try running it in my .010 when my new clip arrives.
Really, isn't an .010 kinda special? I'll give you a Bee to run it in. I'd rather see you slag a Bee than an .010.

I thought it might be a good idea because it is much quieter; but you are right. I have a surestart I could run it in, but It's too loud for where I am. Mad

same here MFD. i can send you a babe bee with muffler, but no clip that moves around and controls amount of muffler or one of the car mufflers. i can't get any engines started with new odonnell 24% nitro i purchased from LHS and need help. new battery, glow head, new gaskets, etc. PM me. happydad Small Cox Logo

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Re: Is it Possible?

Post  John Goddard on Tue Sep 04, 2012 7:43 am

Just my tuppence worth....

Car fuel with as much as 16% oil in seems very unlikely to me.
They usually have less in.

In my (admittedly limited) experience of messing around trying to add
to car fuel it never works very well compared to biting the bullet
and buying some (fresh) purpose made castor based.
Why don't you guys Stateside organise a group buy of some GPB or whatever the best
brew is?

Very Happy
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Re: Is it Possible?

Post  microflitedude on Tue Sep 04, 2012 8:08 am

I have bought GPB, it works great. Even better with added castor. But I can't stand the shipping. Rolling Eyes
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Re: Is it Possible?

Post  PV Pilot on Tue Sep 04, 2012 8:18 am

Traxxas covering there,,,Traxx's,, with the 16% oil. A little bit better lean out protection for folks who don't turn needles that often. They wanted that fuel thick with oil (per say), so most wont complain when they nuke there motor and It gives them a backstop if someone does complain with there RTR models.

Customer: "Your fuel killed my RTR motor!!"
Traxxas rep: Impossible!! it has 16% oil".
Customer: "Well,,it did".
Traxxas rep: "Did you follow the manual settings for the RTR motor?".
Customer: "Well, not quite".
Traxxas rep: "There is your problem right there, you didn't do exactly as we said to".

At that point, Traxxas can wash there hands of your problem if they so choose.

If you used there fuel with some other brand or make of motor,,a hearty laugh as the phone slams the reciever cradle.

Well, they are not that evil,,but you get my meaning.

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Re: Is it Possible?

Post  John Goddard on Tue Sep 04, 2012 9:13 am

microflitedude wrote:I have bought GPB, it works great. Even better with added castor. But I can't stand the shipping. Rolling Eyes

Which is why I mentioned the group buy, surely if one of you buys a gallon or whatever then ships it out in
half litre Evian bottles to individuals in the 'group'..........

Most of the boys here have received a Johnnies Evian bottle before now/costs next to nowt to send
DAMMIT!
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