Sidewinder Pro 20% Fuel IN Cox Engines

10% total oil is a problem. Should be 20% oil.

Phil

Thanks for the help and information. I did recall reading somewhere about 20% castor, but was not thinking when I bought it. Ordering the stuff from Sig would more than likely cost an arm and a leg as the hazmat fees would be quite a bit. This is why my LHS no longer stocks the stuff they told me. This is now why the carry Morgan fuel only. I will look for other options of getting it though. Is there a formula that I could follow to make this 20% castor if I was to choose to? Would castor from the pharmacy be alright if I was to try it? I MAY try a tank or two to see what it runs like. Thank you.

Just did a quick calculation and the fuel would be subject to a $28.50 HAZMAT fee on top of the cost of fuel, along with a $9.95 S&H AND actual shipping costs, of which is all in USD. Fuel was reasonable though. I will be doing some research as to possibly getting my hands on some somewhere, somehow.

There's no hazmat charge on quarts from Sig, just the $9.xx shipping charge. You can buy as many Qts as you want in one order with no hazmat fee. I buy 4 Qts at a time when I run out of Powermaster. Right now, I have plenty of gallons of PM and one Qt of Sig left.

For boosting more than a few %, I would order some Klotz Benol or similar, it's been refined for engines and I believe causes less varnishing. I think Sig sells it. Klotz apparently stopped selling quarts to online customers last time I looked at their site.

I would research the Morgan formula carefully to confirm the oil content before I went that route.
Rusty

I looked on morgans website and the total oil content is 10%. Thats not good. I order my castor from brodak, but you may be able to buy it at motorcycle shops or kart racing shops.
Try this oil calculator.
http://www.nitrorc.com/default2.asp?Introduction=http://www.nitrorc.com/fuelws/oilonly.asp

I bought castor at the local pharmacy

pkrankow wrote:10% total oil is a problem.  Should be 20% oil.

Phil

Seems I misread the original post. My answer was based on that I thought he meant the total oil was 20% with 10% castor. 10% total oil, regardless of the blend, would be no good in any engine in my opinion, except car engines where you would expect it to last only one race. Made for performance rather than protection.

Oldenginerod wrote:

pkrankow wrote:10% total oil is a problem.  Should be 20% oil.

Phil

Seems I misread the original post.  My answer was based on that I thought he meant the total oil was 20% with 10% castor.  10% total oil, regardless of the blend, would be no good in any engine in my opinion, except car engines where you would expect it to last only one race.  Made for performance rather than protection.

10% total oil on SOME materials is plenty, definitely not plain bearings, and depending on the exact oil choice a very heavy load for SOME engines.  For our applications, this is the exception.  

50:1, or 2% is a typical oil load for larger 2-cycle engines, with marine engines using oil injection some use less than 1/2%.  The oil is not expected to remove heat from those engines.

But this is a separate set of points since a Cox engine is plain bearing, and relies of sticky oil to protect the ball socket connection tot he piston, and is steel on steel.

Phil

Sidewinder Pro is all that I've used for several years. They don't include the oil blend package on their containers or website, but a Morgan rep did respond to an email -- the mix is 50/50 syn/castor. I originally chose this fuel because of the initial low oil content --- starting at 10% total oil, I can add more castor and not dilute the nitro as much. I use Klotz BeNol racing castor for the oil additive -- Klotz was, and may still be, the vendor that SIG uses for its lube source, particularly the synthetics. Klotz BeNol has a reddish tinge, SIG castor would work just as well (it may be Klotz without the color additive).

Calculating the final blend from mixing Sidewinder 20/10 and 30/10 plus castor in not difficult, but it is tedious, consequently, I set up an Excel spreadsheet that let's me blend different amounts of two fuels and it will calculate the final mixture percentages. There is a screen shot in another recent thread: Mixing 15% and 35% Glowplugboy fuel.

If anyone would like a copy of the spreadsheet, I'll be happy to email it -- I can't attach it to a PM, so will need your email addy. The spreadsheet that Bernie has on the COX Int'l site is a modified version of this spreadsheet, only for single fuels.

I've had no problems with the Sidewinder Pro fuel at all -- but I do add castor to increase the overall oil content.

andrew

Thank you all again for your help and advice. Looks like I am off to the pharmacy this week. Seeing as I got a 1L bottle, I will probably mix smaller amounts as a little goes a long way with a 1/2a.

Ok. I have to ask another little question regarding this. Seeing as my fuel is 10% overall (50/50 mix) oil, do I want 20% castor oil, or 20% overall? Cause the calculator link referenced earlier asks for current percentage of OIL, and total percentage of oil you would like overall. Or would I be safe by just entering the 10% in my fuel and a total of 20% that I would like to increase it to? Sorry for the dumb question, but do not want to loose an engine.