Race gas

[Teege24]

Hey guys I couldn't find anything about race gas in the search but heres my question..if i have a 93 octane tune would it harm my car putting 100octane race gas in the car?..im thinking yes cuz my tunes specifically for 93octane but i figured id ask

 

[Kobie]

Nope. You can only use as much of the octane number as the car "needs".

 

[don_w]

Octane is merely an "anti-knock" number. Putting in 100 on a 93 tune will decrease the chance of detonation, but won't necessarily increase performance (unless your knock sensors have been pulling timing on the 93 tune).

 

[Alter Ego Trip]

Nope. You can only use as much of the octane number as the car "needs".

Agree'd. If your car is not pulling timing, the extra octane won't do you much good. If you set up a race tune and add timing back in though.......

Say good bye to your 02 sensors after filling up though.

 

[BLKS197]

You can use 100 octane in a car tuned for 93. Why are you looking to use 100?

 

[Teege24]

thanks, guys and reason for using it is my buddy has some lying around and i kinda just wanted to throw some in my car to see if it did anything...i just dont want my car to blow up cuz its not tuned for it lol but if im not gonna get any noticeable performance outta it i dont think its worth it

 

[joedls]

.

Say good bye to your 02 sensors after filling up though.

Why?

 

[Miracle]

Say good bye to your 02 sensors after filling up though.

Not really... they do make unleaded 100 octane fuel, no need to worry about the O2's with that.

thanks, guys and reason for using it is my buddy has some lying around and i kinda just wanted to throw some in my car to see if it did anything...i just dont want my car to blow up cuz its not tuned for it lol but if im not gonna get any noticeable performance outta it i dont think its worth it

Apparently you missed it:

Octane is merely an "anti-knock" number. Putting in 100 on a 93 tune will decrease the chance of detonation, but won't necessarily increase performance (unless your knock sensors have been pulling timing on the 93 tune).

Unless you change the tune, or are having knock issues with 93, then there is no reason to try to use it... you won't get anything out of it.

 

[BlownAway05]

your car will run leaner as the stoich for 100 unleaded is less than that of 93 (i.e. you will need more fuel per air)

 

[RedFire07GT]

will not harm it, i use 109 at the track and my race tune is set for 93... I only put higher octane in so i can mess with the timing on my car while im racing.




Brandon

 

[Alter Ego Trip]

Not really... they do make unleaded 100 octane fuel,

Unless you live in BFE like I do.

I'd give my left nut just to find a pump with 93.

 

[07TwinScrewdGT]

You CAN run UNLEADED 100 Octane on a 93 octane tune and like someone said before you may not see a performance gain unless your car is pulling timing BUT it WILL give you extra protection against detonation especially if your boosted but if your n/a i wouldnt waste the gas... I run a couple a gallons of 100 octane with my 93 octane tune on the weekends just for the extra protection cuz its so hot right now here in florida that my intake temps are running a little high thus increasing my chance of detonation so i use it as a precaution when im doing ALOT of racing on the weekends.. Also during the week (Its my daily driver) I load on my 91 octane tune but the car only gets filled with 93 octane for the same reason just extra piece of mind...

 

[Kuro!]

thanks, guys and reason for using it is my buddy has some lying around and i kinda just wanted to throw some in my car to see if it did anything...i just dont want my car to blow up cuz its not tuned for it lol but if im not gonna get any noticeable performance outta it i dont think its worth it

What fuel is it exactly?

Race fuel is a generic name; you can run anything from C16 to VP Import...

And FYI, if the jug has been opened for some time it's probably no good. Old race fuel sucks...

 

[DirtyDogOfTheDesert]

There is also the stoich point of the fuel to consider. It could run leaner or richer depending on how different to stoich point of the 2 different fuels are.
VP MS109 for example runs almost a full point leaner than pump gas. Running that without being tuned for it could cause problems if you're really beating on the car.