Tractor Pulling Fuel: Race Fuel vs. Regular Fuel on a Dyno 

Here is my tip, when pouring from that kind of can if it is full. Turn it half a turn so the spout is at the top. It will splash way less and lets in some air giving you a smoother pour.

The advantage of race fuel, specifically high octane, is that you can advance the timing for even more power. Depending on the race fuel, it may require carb jet changes to achieve proper air fuel ratio.

this girl is getting to my heart lol we need more like her doing this stuff

After watching many of your videos I bought an 8n. I've fixed a lot of stuff and it's running kind of smooth now and starts up easy. The tractor is far from perfect but it has already done lots of work around here.

I just built an engine for my *Minneapolis Moline R.* We dynoed it a few months ago, but I really wanted to try different Octane ratings just to see. Thanks for making this video. 👍

If I were racing I would try it with some of timing advance the guys were talking about. For my needs, I'm happy that she starts right up. Thanks

I'd be really curious if a few more hp could be gained by bumping the timing on the race fuel.

Race fuel alone is pretty useless in itself. If the octane is higher with race fuel,just increase ignition advance. If you have a pretty low compression ratio engine you make things nearly worse with a longer to start to ignite fuel.

That is AMAZING!! would never have thought of it.

For a comparison between the fuels you're running the Dyno correctly. If your testing the power you are not, you have to use the chart supplied by the Dyno company to where the M was tested at it may be dynoed at 530 PTO or maybe 550 . 540 is the PTO speed but not necessarily the dynoed speed as tested

Just barely above the 5% that could be chalked up to measurement error on the instrument. Have you tried advancing the ignition timing with race fuel? The benefits of higher octane are best found with higher compression and ignition timing. Pretty cool to have a dyno. Great way to mess around with tuning.

Love the video! I believe a stock motor would not see that increase and you have no doubt added some compression. Keep the video's coming!

Very interesting, Rachel! Thanks to you and Dan, for what you guys do! You have both helped me out with your videos.

Always nice to do some dyno tests! We had a jd 4020 with a 4430 turbo set and a injection pump with big plungers. 180 horse power was no problem at the dyno untill the pto clutch slipped.

Here in Ohio we have recreational 91 octane . and its Ethanol free. our old tractors tune very well with it. Currently around $3.65 gallon. half of VP or others. also small motors really like it too. Chainsaws, weed eaters. I dont store large amounts of pump gas anymore. if you use it from the pump , get it fresh. Its not like they used to make it ,thats for sure.

Thank you about these great videos. Did you know that that these videos are watched also in Northern Europe. I wish you could repaire some European models too. Like English old Diesel Ford tractors. 💕

Love what you guys are doing and enjoy all the 8N videos. Will definitely Check the website out as well.

Who in the world gave Rachel a thumbs-down??? :O

Another 3-5° on timing would probably help even more. Thanks for the video, might try this in a Jubilee at some point.

Nice comparison, thanks for sharing the info.

Same thing I've been saying For Years about the Hit & Miss Engines running better on High Octane Fuel. They DON'T NEED the High Octane to Control Detonation, as they aren't even Remotely High Compression Engines needing the High Octane Fuels Slower Burn Rate (which Controls Detonation) but the Slower Burn Rate allows the Fuel to Burn/Expand throughout More of the Power Stroke, Versus having a Quick Explosion with a Spike in Pressure at Top Dead Center (from Low Octane Fuel) that Quickly Bleeds Off through the rest of the power stroke. In a Low Speed Low Compression Engine it gives More Power because of that, while at Higher Speeds a Low Compression Engine Will LOSE Power running too high of an octane because the fuel isn't all burned during the power stroke. At a Mere 540RPM a Tractor Never Reaches that point of Losing power from it. At 4,000 , 5,000 , 7,000RPM and Higher you will make The Most Power Your Engine Can Make by running The Lowest Octane it Can Handle without Detonation, and of course, The Higher The Compression, The Higher the Octane Requirements. Ideally You would want to run Higher than needed Octane at Low Speeds for More Low-End Torque and then Switch Over to Lower Octane (as Low as the Compression Ratio Will Allow) as the RPM Increases, which would be damn near impossible to control with a carburetor, but with a set of custom heads with Dual Injectors plumbed into different Octane Fuels, it could be switched On-Demand as the RPM changed, up and down.

The way Rachel says "tractor" does funny things to me

Bump up the timing a bit to take advantage of the higher octane... still great to see you with your M tractor.

No wonder your tractors run so good! 200 octane aircraft fuel! 😀😃🙂🙃😊

Race Fuel? Just higher octane or is it oxygenated? Octane by itself DOES NOT add power it is just the resistance to detonation. If you made power with just octane you had your timing to far advanced and was detonating. If you have a computerized ignition system that has a knock sensor and is setup aggressively to auto advance timing then maybe....

Beautiful job you both do! Is always beautiful to see the family working in harmony! To test it in the Dyno I guess you connect a bar extension to it?

Great video Rachel. Seems like some of the viewers want you to give up all of your tricks for being the best tractor puller. IMO they need to walk the walk for themselves. 😉 😂😂😂

Wonderful Rachel

Used this in uk 30 years ago when we had smaller tractors

Helpful on Friday nights dragging on Main Street! 😆 🤣 😂 Stay away from Vettes! 😀😃🙂🙃😊

You can also advance your timing on racing fuel, cause it burns slower....

I’d think the gain is more to do with the race fuel having no ethanol. “Regular gas” these days is at least 10% ethanol, which makes the fuel less powerful due to fewer BTU. Unless you’re running high compression (10-11:1 or higher in a tractor), which I doubt an M&W kit alone could do, the high octane fuel could actually cost a few horsepower compared to a lower octane, 100% gasoline fuel.

Really enjoyed this! Surprised at the results. 4hp is 6.66% increase, if my math is right. Absolutely worth it! In a tractor pull. When it comes to making tractor power. My heart beats a lot faster. 😆

You are so good

Pretty cool video I don't think I ever really saw up close someone working or reading one. As far as the resaults not sure if it's worth all that extra in fuel for the 4 horsepower. Don't think it would be beneficial or noticeable going down the track. Keep up the great videos!!

Could get even more out of the race gas by advancing the timing.

Advance timing and raise compression. I have a John Deere 50 that on 110 octane low lead av gas turns out 80hp

You have that one running well. Nebraska test was 36 hp on pto

I’ll try it 👍🏻

Good Dan Gingell Hi Dan, I like all of your videos and I have a farm and a tractor of the type of German Fint

Thanks sister

Clearly to take advantage of higher octane you have to add timing (or more boost on a forced induction engine) The only reason she gained power is most likely due to the fact that the carburetor is jetted wrong and the higher octane is able to correct

You didn't mention the specs. of the fuel. Modern pumped gas or off the rack gasoline at best is 92 to 94 octane. When I was buying cam II racing fuel it was 104 and 110 octane. The higher level needed more timing advance, which is why you run a high octane if your not bumping up the compression. I'm not sure what the compression ratio is on your tractor but with 104 I would want no less than 9.5:1. I moved from race fuel to avgas because of the benefit of the lead. All the lead in avgas can let you tune the timing through the roof with low compression and not get a spark knock. If you are allowed to run an electronic conversion from points that will make a difference to. You should try race gas with lead additive and some timing adjustments.

Great girl! For sure!

Great job

Miss Ginzell!!! Would you please do another version of this video where you put these test results up against a gas tank with regular fuel with a bottle of Lucas Oil “Tune Up In A Bottle?” The reason I ask is because I use that fuel in my 53’ Super H and I want to see if it does live up to its claim of “eliminated the need for higher octane fuel.” Thank you!

call me skeptical, but I think you pulled the tractor RPMs down a little bit too far in that first Dyno run compared to what it sounded like in the second run. Also, high octane fuel such as race gas will actually give you poor performance in a low compression engine. Mainly because high octane fuel is designed to delay ignition for high compression engines while low octane fuel is designed to ignite sooner.. The reason high compression engines need high octane fuel is because the higher compression will ignite the fuel quicker giving you detonation or pinging with fuel that is too low in octane. There is nothing to be gained in low compression engines with high octane fuel, just the opposite is true. Research it!

answers a question id wanted to know for years,,,,thanks

Great video thank you

Would warm oil in Dyno on second test affect reading? Love your channel. No disrespect. Shalom

Love these vids!

How much compression does the M have?? Because if your compression is not high that race gas not going to do you any good

Could you do the same test but with like an unmodified Farmall A something with a lot less compression

I like it, great idea.. Those extra horses will make a difference maybe..

Nice M&W Dyno, do you may know how much it wheigts?

Lots of unknowns here... what type of "regular" fuel are you using? 87 Octance, 91 Non-Oxy, E-85? And what type of race fuel? something from VP? or just 100LL from a local pump that's labeled race gas? compression? timing?

Rachel: What is the compression ratio on your M ? We have found that the best power comes with the lowest octane fuel before detonation. How HOT is the engine in that M ???

Fun toy!

Rachel is that a Farmall M that you guys use there thanks ?

Hi Rachel, ca you explain more about this your dyno? Is very different to me. Thanks! Wagner from Brazil

That tractor would get stomped at local pulls around here. Most ms are 100 hp or mpre.....

to do an accurate comparison the dyno oil temp needs to be the same for both. i am not saying your test was not accurate.

Be good to see what it does when it’s properly tuned for race fuel ⛽️, then stick it on the Dyno?

Did the regular pump-gas fuel include ~10% ethanol? If so that alone could explain the difference.

How much does the race fuel cost vs regular fuel? Just a question for comparison :)

Don't know what you were pouring in there...maybe U4.4 becauase it was blue...anyways, without jetting and timing changes, you're leaving a lot of potential gains on the table.

I think I'm in love.

Thenk you

Thats nice... like Rachel Princess. 😊😀🤗💖🏁🇫🇮

I'd run race fuel too, the exhaust will smell better.

Interesting!

I love your videos .... Do you think it would harm my relationship if I asked my Fianc'e to be more like Rachel . No she is actually pretty good about participating in my tractor events , but on a side note , Our Country was King of the World because of people like Rachel ... If we had millions more Rachels maybe we could bring it back .

Can u do something on 53 ford jubilee?? Or show me where I can find some good vids???

What's the compression ratio?

What kind of dynamometer is that?

60 HP with regular gas. What did you do to that tractor? 450 engine with fire crater pistons? Wouldn't surprise me. With oversized sleeves and pistons, the M engine would put out about 45 hp. You cannot put 450 sized sleeves and pistons in an M to my knowledge.

Just so you're aware, there are many different types of race-fuel.

I'm still sticking to my comments on the video 1 month ago injector replacement !;-)

Hola hermosa siempre tan sinpatica abrazos Ariel de T.M.P

what octane I wonder a 110

What are the details of the ace fuel? Octane etc?How much does race fuel help horspower in a standard stock "M"engine?

Did you use VP race fuel or other? Thanks

there are too many variables that have not been accounted for. it seems that neither the tractor nor dyno were up to standard operating temperature. the power potential of the fuel was not exploited without proper tuning for each. also, try propane!

Regarding racing fuel, The engine will heat up way past normal operating temperature and that could cause major engine damage, especially to the head and valves!

What's the octane number on each of the fuels?

cool 👍👍

What about diesel?

Can you run the race fuel in a stock truck with no ill effects?

now... throw in a can of cox airplane fuel....lol

Too bad no one uses those old machines anymore

Octane+timing change=more hp

I have a 1950 8n tractor, new starter,solonoid,battery cables, all electrical connections cleaned. but it cranks real slow and not start, but if I pull start it it will start ? got any suggestions? ps. it cranks a little faster with all the plugs removed

look at it this way. pump gas is known to be crap.

I can have 4hp more and still spin out just as soon lol

60 horse out of a "stock" M? Is it a Super M? Me thinks it's not quite "stock". You should have a spanking! :p

Man, I need to move to America and find a vibrant lady who isn't afraid to get grease on her hands.

Ha ha this great!!! Scotty giver more power. I am captain, but she's gonna fly her self apart. Then fly her apart dag Nam it.

Airplane fuel leaded oyea

Now test it with aviation fuel

Have you ever tried jet fuel? Great video.