So I am starting to plan to upgrade my fuel system, and getting prepared to get my car finally protuned...can I run c16 on the stock fuel system and clear car out of 91 and run c16 race fuel and get protuned thinking about getting a 91 octane pro tune map and a c16 protune map, or would I be better off upgrading fuel pump and doing DW injectors and running just e85 on protune? how does the e85 compare to c16? I am new to using race fuels and the e85 concept but I know e85 burns hotter you use more of it, and it is less knock prone. basically what would be the better route?

Thanks in advanced sorry for all the question :/

 

Opposite, it burns cooler making it less prone to knock.

 

sure, you can run race fuel if you like. it is just expensive.

c16 is leaded so it doesnt like cats or oxygen sensors. it is also much more corrosive to your fuel system.

depending on your setup, if you want a race fuel consider ms109

 

the e85 burns cooler?

I want to get a tune for a race fuel so whatever will get me the best numbers and be most reliable do you know where i could buy ms109 and other info on it?

 

I want more info on this. I am in the process of switching to E85 but don't like how inconsistent it is from gas stations. I'd rather spend a bit more and know exactly what I'm getting every fuel up. There are a few VP carriers local to me so if it makes more sense to run c16 for me I'll go that route as well.

 

109 octane isn't going to give you the power E85 will. I have access to 110 oct I've already gone over it with my tuner and see no serious benefit even over 93, it's not real race gas it's just higher octane.

 

I really want to do e85 but c16 is local for me as well there are no e85 stations out here in the sticks but a few of the motor cycle shops in grass valley carry c16, what kind of number where u making on higher octane

 

I didn't bother making the switch because my tuner said it's pretty pointless, yes it'll make slightly more power and less knock compared to 93 but nothing like going from 93 to E85 or c16. I want my 9 turbo at 30psi . he said that won't happen on 110oct so I lost interest.

 

I'm surprised to learn that your tuners indicate E85 will make significantly more power than C16, given the same amount of fuel. That might be the difference, in that the burn rate with E85 is faster, with somewhat lower fuel economy, but with more fuel, lower temps and more power. Smarter people can explain whether I'm right or wrong.

The best thing about C16 or any race fuel, is its consistency. You can count on the performance of the fuel and thus can tune accordingly. It makes things like, elevation changes, ambient temps, etc, easier to incorporate into different maps.

 

E85 can be inconsistent but 3 dollars a gallon vp c 16 is great and is all I run in my car I buy a 55 gallon drum and it is very expensive compared to e85 but I rather have the best

 

Tagged for interest. I'd like to switch over to E85 as well.

 

Here's what you have to consider , e85 is alot less money per gallon but you need 2 fuel pumps and alot larger injectors and a e85 content analyzer to be safe. It will make alot more power than 93.
On the other hand , c16 will makes 50-75whp more than 93. Your current fuel system will probably work just fine. You always get the same quality.
Me personally I run c16 because I can not get e85 and to set my car up for e85 is probably $1500. I can buy alot of c16 for $1500

 

C16 is in a whole different league than E-85.

From my understandings E-85 has a octane rating similar to 105 octane.

C16 has an octane rating of 117.

Maybe on a stock turbo, or mild build you won't see a huge difference between the two, but for a larger displacement car with very large turbos C16 will make considerably more power than E-85. For reference, I have seen it make 300 more WHP than E-85 (not an Evo), and E85 made the same power as Sunoco 110 octane.


Also for a 55 gallon drum of VP racing C16, you're looking at just shy of $1000. So there is no comparison price wise, not to mention E-85 can be had at the gas station. http://www.vpracingfuels.com/index.h...pping.ViewCart

As someone mentioned C16 is leaded and WILL wreck your o2 sensors, and don't even consider this if you have an type of cat in your car still.

I would never consider C16 an option for a stock turbo or even mildly built Evo, you'd be wasting your money for the gains. E-85 will offer better bang for buck when it comes to the Evo.

 

Getting barrels of fuel is sketchy business, if I had a garage detatched from my house I'd definitely go this route but while my garage is one with the house, I won't consider it.
http://www.maperformance.com/55-gall...cing-fuel.html

My only complaint about ethanol is it's not consistant from the pumps around here (western NY) the percentage fluctuates with the seasons, in the summer it's usually 85% but spring and fall it's only 70-75% and even in the summer it's not always exactly 85. I'm to the point where my stock block is maxed out so if I do a hard pull on the track and it's not exactly 85% like it is when I get the tune done I could be ****ed with a pretty new window in my block.

 

Also in our area E-85 is very limited at least by me. Thera are 2 stations. I'm in Buffalo