Just want to know that non of it will hurt the new girl want her to run like a -aped ape but not tear it up let me know.axp---cam-2 vp-12 u4.2 also I want to add the goodys that we usesd to put in or oil to make it like dog snott. like moly lq addatives cant find them any more no automotive enginerings around any more. Thanks for your input on this matter.

 

I dont know if you get more power without custom tuning...maybe better use of the power band and less detonation risk with hot tuning. Leaded fuels work well in high compression engines. Don't use leaded fuel in a car with catalytic converters. The leaded fuel will clean the engine and clog the cats over time with the residue and carbon build up in your engine. Leaded fuel will harm O2 sensors. I don't use AVgas but some guys at our club with older original carburetor engines do use the 100 octane low lead to keep the pinging down and around here some speedway stations have 116 at the pump but the Nossle only fits a fuel can opening.

http://en.wikipedia.org/wiki/Tetraethyllead

They better never take it out of aviation fuels -- it keeps the piston engines very clean and very well lubricated. You don't want a valve issue in the air.

 

You will not gain anything by running anything over 91 octane unless you have a custom tune for it. It will actually be slower with high octane fuels.

Reason is that the higher the octane number the slower the burn of the fuel.... but as a trade off you can advance timing further which gains you more power....

When you have fixed timing... as in the car max's out its timing advance with 91 octane, and you keep adding octane to the car, your performance will begin to suffer.

Anyone that says other wise does not fully understand how octane works.

 

This.

 

An oxygenated race gas will make more power than regular old 91-93 because it will burn faster. Something like Sunoco 100 is just a highly refined version of pump gas and actually burns slower, giving you no benefit unless you increase timing and make other changes to take advantage of it.

Mike

 

Don't run race fuel (c12, 110 etc...) as others have said it will make less power then pump fuel and can cause problems.
I also wouldn't run any sort of oxygenated fuel in a daily driven car. In a full on race car or in a fuel system that can handle the additives in an oxy fuel it can make more power but that stuff is plain nasty. I work for a company that is a vp fuel dist. And that oxy fuel smells up the warehouse even in a sealed metal can.
A lot of guys are tuning for e85 now and that stuff is equally volatile.
Do yourself a favor and stick with a good quality pump fuel, your car will thank you.

 

That would probably mess up the TiVCT. Though it is more mechanical than the 4.6 (which was all hydraulic), there is still hydraulics involved. Thickening the oil could cause problems - might even void your warranty.

 

So the 5.0's adaptive spark ignition system is maxed at 91? I know the 4.6 is on Bullitt, but so many here can get 93 and run it that I was thinking the 5.0 max was for 93.

Wonder what the manual specs.

 

I thought it was 93 as well.

 

I know the max HP rating from Ford 412/420 is off of the 91 octane bc not everyone has access to 93. But I can't remember if anyone ran with just the two different fuels to see if it adjusted. With a tune there is a noticeable difference between 91 & 93. But stock I don't know if it can adjust any higher

 

Read the owners manual, It says 91 is recommended for best results or something like that.

Also 93 is not common else ware in the country. But you can buy tunes for that.

 

My car is tuned for 93. If E85 were available here in Petroleumville USA, I would be running it...with FTW oxygenated E85 for the track.

Mike

 

Question - I run VP 92 octane fuel, I use it as it is ethanol free and the closest station from work where I can fill up easily. I looked on the VP site and couldn't find it so it's probably not anything specific to racing, probably just ethanol free... Any issues with running this fuel as opposed to 91 ethanol fuel (which I have many issues with, personally)?

I am currently not running a tune, I want the car for a year before I consider that...

 

where do you get VP fuel out? Are you referring to VP race fuel or what? Because if your paying anything over pump 91 octane fuel for your mustang your wasting your money, because your not gaining anything about it.

 

well - it's sold under a vp racing fuel label and ethanol free. may not be getting "anything" from the 92, but it's corn free which is more important to me.