racing fuel

[maple]

Going to the track right now need a fast anwser
will racing fuel mess up my stock 5.7 2015 truck i think its 109 octane

 

[craigsez]

waste of your $$ unless your tuned for it....Just gonna exhaust smell good is all and drain your pocket some..

 

[maple]

Thanks

 

[Kotta390]

Basically what Craig said. If you are tuned for it be sure to run UNLEADED race fuel if you have cats. Even if you don't have cats the leaded race fuel can still screw up the 02 sensors to an extent. Be mindful of this.

 

[dhay13]

waste of money unless your engine requires it

 

[Kotta390]

waste of money unless your engine requires it

Your engine requires whatever it is programmed for and the construction of it.

Have a friend who has been running his 2003 Hemi with a set of colder plugs on a 150 shot for 4 years now and no issues from the engine. He runs race fuel, but only because he has no tune and runs stock timing.

 

[craigsez]

running race fuel on any engine thats not prepped for it,is like tossing $$ out the window..Save the bucks for an under drive,thinner head gasket,timeing and tune for the higher comp and nitro....If your goin that far may as well save longer for intakes and ex to....Its a wild circle cause just as you get one thing you need another to get the best from the 1st.

 

[Rupert]

I don't actaully disagree with anything already posted, but I offer a different scenerio:
IF , IF you have a CMR tune and IF you have talked to your tuner, You may be able to run some race gas ( unleaded) and pick up a tenth or so:

Run your tank down to 3 gallons of pump ( 93 is what I run in my Charger), which we all do anyway to save weight, right? Then add about 4-5 gallons of say 104 unleaded.

now you have about 8 gallons of 98 or higher octane. I always mix more 104 than I think I have of 93 in the tank.

IF your tuner says ok, modify the CMR tune, add 4 deg( or whatever amount your tuner directs) of timing to all ranges and load the tune.

see if that cuts some time off of your ET.

You should log for knock, and an AFR is very helpful, you may need to add fuel.

So a trinity vice a IT2 would come in handy, or bring your laptop.

When your done racing reload the tune AFTER you reset all paramaters, and BEFORE you fill up with hi test on the way home.

I dont intend on doing this on my truck, but if I was chasing an ET, I sure would.

Obviusly this isn't for someone new to tuning.

Another way is to get a "race tune" from your CMR tuner that you can load at the track.

I think the trinty will hold up to 5 CMR (custom) tunes , not sure on the IT2.

There is also a way to save a modified tune and rename it, but I believe you have to export it to your laptop as "last tune written" , then rename it, then put it back onto your tuner. Then you would want to reflash the PCM with your "daily driver cmr tune. "/

That is not instructions do not try this at home, I just wanted to say what can be done.