AFR vs HP - The effects of fuel ratio on horsepower

Different fuel ratios dyno tested

@garge4age

[Garageage]

Those That are squinting trying to see the results on a small screen. AFR's between 13.5 & 11.5 make basically same power. Richer the power starts to take a dive. Will attempt to try something with the dyno graphs in the future so are more readable on small screens ! Also as stated in the video the afr is messy because engine was run up with the intake runners it happened to have on it at the time. not the normal intake, so tune isnt dialed in. Video pretty much speaks for itself that it doesn't matter long as is within the range for testing purposes.

[senojnaes]

Loving the videos man! Very informative, great to see actual testing rather than internet theories

[michaelblacktree]

Those results were interesting. Thanks for sharing! 👍

[Stylerbc]

Блин, братан прости напишу по русски. Ты просто красавчик! Я всегда много всего изучаю, теории и всего прочего. Читаю drive2 и всякую литературу, но это - это лучшее, что может быть на свете! Thank you, great job!

[GUEST-qwte]

You should go into lean mixes. There is two phenomena in the US we know about, but don't practice. Its called lean power true stoich mixture. When you get between 20 and 40:1 HP will start to go up AND egts will start going down also emissions decrease. However you must match the ignition timing to help in preventing detonation.

True stoich mixture is when egts go down stabilize AND the emissions go down and stabilize. This indicates ALL the fuel is burned. You can't create excess heat or emissions if there is nothing left burning as it enters the exhaust.

[donamulka]

uno de los mejores canales, sique asi! me encantan estos experimentos y tu forma de hacer las cosas

[cbgti]

I don't have a 4AGE car, but all your tests are VERY interesting !
THANKS A LOT !

[user]

Thanks for great videos I'm currently running a 4agez with t3t4 0.48 exhaust housing and is running 12.3 afr thanks it's at the sweet spot

[dariocastellvi]

Best of youtube, congrats. Next time the same with Ignition´s advance ;)

[Slaktrax]

There is a lot of info on some good well established websites that show best power and torque is between 12.8 and 13.2:1 AFR.

[oikkuoek]

What does the AFR and timing do to the power output? When you richen the mix, it burns slower and colder. When you ignite that mix earlier, the peak hits the piston at the right spot. The key difference is in the burn. Thicker mix has more inertia, and has the ability to move heavier objects with more speed further away. When you are running a turbo, these heavier gas/solid/liquid mixtures also spool your turbo faster. BUT heavier tune also needs a bigger spark to ignite the mixture, and when the conditions ger worse as the mix richens, this calls for a different type of spark plug.

[jakizakaria]

base on your video, i will not worried losing power if i made 13, 5 afr, thanks man! really appreciate

[gedas]

Please do ignition and AFR. Is it true that richer mixture withstands higher ignition angles?

[FlyApeRally]

Have you ever tried different kind of fuels octanage / brands + additives (those sort of lucas oil +HP additives) and so?

[cal]

Would you be able to try play with timing when you have the chance man? Try different timing and total advances? Since the fuel seems to not make a huge different until you go super rich. Maybe its worth checking timing next and seeing if more fuel with maybe more timing can help? Or maybe playing the the timing on its own?

[kmturbomarket]

Great! very interesting fuel vs egt))) and ign vs egt vs hp!!!

[s.a.f.r.a]

You should run a set of injectors Infront of the runners spraying directly in

[eyelid]

I think AFR on lean side you'd get the most power, but it's not good for engine health as knocking gets dangerously close.

[jordanallen]

So lean and mean, best for fuel econony and no power lost :)

[benheynen]

Great vid but you probably need to look at this while running at a set level of knock. Hard to do on an engine that is most likely not heavily detonation limited. Get the turbo one on there and do a comparo between a "run it at 12:1" vs to a defined pre turbine or port gas temp.