what fuel do you use
1 - 20 of 43 Posts
Joined
·
257 Posts
Premium pump gas here with stock compression
Joined
·
81 Posts
Joined
·
257 Posts
I have been eyeballing higher compression pistons for a while, but I am not sure if I want to just get a 686 and run pump gas still or if I should go all out and go to a bigger displacement, of course then I will need the dual exhaust and the fcr's and it will cost all kinds of money, I know it is worth it, but I am cheap.
Joined
·
3,016 Posts
I know 91 Octane in my area is $4.20 a gallon right now, and the 110 Octane is $6.50. I think it depends how often you ride to get high compression or not.
Let's just say this, for the average rider that uses 10 gallons a month in their quads, maybe two long weekends or 4 short rides.
With Pump gas the total would be $42 for that whole month
The race gas would be $65 for that month.
So you're spending around an extra $23 in one month, for more horsepower. And say you ride less than that, only use 5 gallons in a month. That's $11.50 for a month of riding, and you get alot more HP and Torque.
Joined
·
33 Posts
Joined
·
24 Posts
35% NitroMethane 65% 93 octane.
Joined
·
887 Posts
You really don't need premium with stock compression. You are really wasting your money because it doesn't burn it any different than 87. I am running C12 gas on 14:1. I could go oxyg and get an extra 3hp but it does just fine. it is really not that great to switch gas all the time!
If you really want to know about fuels go here:thumb:
http://www.vpracingfuels.com/vp_01_fuels.html
If you really want to know about fuels go here:thumb:
http://www.vpracingfuels.com/vp_01_fuels.html
Joined
·
2,192 Posts
I run premium pump gas on ALL stock motors, better fuel mileage and better for the environment!
Joined
·
3,016 Posts
Actually, in the dunes my stock motor pinged frequently with 87 octane, worked well with 91. The load from the paddles going up hills in sand had too much load on the motor. You have to remember how large the combustion chamber is on all the Raptors, definetly not the most efficient use of combustion space. And oxy fuel will only net 1 hp and 1 lbs of torque across the whole power band, unless they got some trick magical shit now I haven't seen. :lol:
I know you tested the gunky stuff, but the question is if that fuel would really last in real world conditions, not just the dyno. The lower octane you go the more hp conceivably one should get.
And actually SEVEN00, the premium gas gets worse gas mileage, and worse for the environment. I'm not actually sure where you heard that but I think they got it backwards. The higher octanes aren't as clean as the lower 87, due to additives that help the 91 octane get there, over time it can cause build up on the combustion chamber and piston, making higher compression slightly actually, but after enough time the bike will require 91 octane always.
But I do run premium anywho :rockon:
Joined
·
2,051 Posts
ok if that is true pdub i did a little experiment while driving my sunfire across the country. i ran 87, 89, 91 and 94 octane fuel to see the differences. i got 34 with 87 35 with 89 37 with 91 and 38.5 with 94. but i learned not to fill up on premium and then drive through denver lol. the thing had absolutely no power in the mountains, i stopped and filled it with 87 and it ran much better. also premium fuel is more refined than 87 it does have additives but depending on what they are would mean if it is better for the environment or not.
Joined
·
2,192 Posts
I dont know what planet you are from pdub but, I get several miles per gallon more by using premium pump gas here in the state of PA! It isn't much but in the long run, it adds up!
I get 14 on 87 and 17 to 18 on 93 octane. My current vehicle has 135,000 miles on it, so do the math, it pays off when you go with the premium.
I get 14 on 87 and 17 to 18 on 93 octane. My current vehicle has 135,000 miles on it, so do the math, it pays off when you go with the premium.
Joined
·
3,016 Posts
Ok let me see if I can explain this in lamens terms lol. Let's say your vehicle can run on 87 octane, the higher octane you go the less power it will make, why is that? Because the harder it is for the fuel to combust when you don't have the timing ignition or compression to combust it, ergo slowing flame travel. Now when you're making less power you're also making less Volumetric Efficiency on that size motor. The less efficient you make your motor the worse gas mileage it is going to get, same concept as a k&n and flowmasters giving better gas mileage. Or a tuner on a truck that advances the timing ignition to help spark that flame front in the chamber. My current small block dodge, a 340, gets 22 miles per gallon, and that's due to the compression I run, the camshaft and cylinder heads I mapped out, and the low 87 octane I use.
Now you might be wondering why your test showed differently? Unfortunately there are alot of variables that can go into that. Right down to how accurate is the gas pump when measuring the fuel.
But hey, Seven00 is you don't believe I listen to your theories as soon as you know what BSFC is, because that is the key information in what makes gas mileage in an internal combustion motor. :thumb:
I run premium in mines:banana:!! But what if I decided to run 111 octane in a stock engine? Would it hurt anything:think:?
Joined
·
48 Posts
yes do not do that...that will be really bad for your motor..you will cause detonation and burn it up.
i run 91 octane...seems fine...no reason to run premium and being at sea level 87 doesnt run that great
Joined
·
887 Posts
Ya you cn run the cheap stuff and be ok. I would not run 111 you only need that with 12:1 compresssion and above:thumb: You are not burning your fuel right with 9:1 comp
Joined
·
2,192 Posts
Joined
·
3,016 Posts
Nice google search :lol:
1 - 20 of 43 Posts
