Racing Fuel ???

[Quikshifter]

 I was wondering if someone could help me ?

I'm gunna do a track day and want to run some av gas/racing fuel , do I fill the whole tank with it or is there a

percentage formula. If I use the wrong mix will it blow my piston thru the head ?

NOS is a bit advanced for me !   

[NotSoMadRussian]

If bike is stock, you are better off with 93 octane.

My 2000 ran better on 87 then premium

[duncan]

Run the lowest octain you can without preignition possibilites. YOUR BIKE WILL RUN CRISPER AND MAKE MORE HP.

[Quikshifter]

 Well, didn't expect an answer like that , the lower the octane the higher the horsepower , very strange , but

OK ! Thanx guys 

[migz08busa]

I read article in super streetbike that tested 87/89/91 or 93 and it showed that 93 put a extra hp. Not really a big jump but it did prove it on a dyno machine.   

[yvesgsxr1300]

Run the lowest octain you can without preignition possibilites. YOUR BIKE WILL RUN CRISPER AND MAKE MORE HP.

    Same for me

[gnd111]

Get MR9 or MR11 as they are both very low octane and oxygenated...

[NotSoMadRussian]

Get MR9 or MR11 as they are both very low octane and oxygenated...

There is only one MR (MadRussian) 

[gnd111]

Get MR9 or MR11 as they are both very low octane and oxygenated...

There is only one MR (MadRussian) 

You may need to get VP squared away on that...

[gjp1300]

Oxygenated ERC 89 octane fuel for a stock motor,do not mix it with the pump gas!We tested it on the dyno on my stock 08 this year,173hp on pump gas,then we drained out the gas and added the ERC,180hp just dumping it in the tank,we tweaked 2 more hp out of it with the yosh box,we probably would have picked up a couple more hp if we had the PC3 on it as we ran out of adjustment with the stock ECU,we couldn't lean it down anymore without a PC and thats where we needed to go,everytime we leaned it down it gained power.When I was done testing with the fuel still in the tank I added my pump gas back in the tank,probably a 50/50 mixture and we made one more pull reseting the ECU to where it was when we started and it made 176hp.Hope that helps you. 

[gnd111]

Just do not get any leaner than 13.2 on the dyno...

[Quikshifter]

At the risk of sounding like a dummy .... what exactly is oxygenated ERC & where do I get it ?

Things mite be a bit different in OZ , our norm pump gas octanes are typically  > 91/95/98 !

[Steve@OrientExpress]

Folks often confuse octane ratings with horsepower. Octane ratings are a measure of the fuel's RESISTANCE to predetonation. So, high octane fuels tend to be required in high compression conditions, or when the chamber design is poor (inefficient).

On a motor that makes 175 hp, 1 hp is hard to notice and measure. Were all the temperatures exactly the same 30 minutes later? 1.75hp would be 1%. Figure 2% minimum to be a real difference. that's 3.5hp. Again, hard to notice and measure on a motor that makes 175hp, and especially hard if the conditions of the test are not super controlled.

Oxygenated fuels bring extra oxygen to the chamber, and help produce more power - but you have to adjust your mapping to compensate or you can have serious problems....

[Quikshifter]

Very enlightning Steve, Thanx !!

[Steve@OrientExpress]

Basically, if you have done enough mods to your bike that you think there might be an advantage to running some race fuel in it, go ahead. But please make sure to tune or have your bike tuned for the specific race fuel that you choose. Most tuners will recommend specific fuels for specific motors (N/A big bore/NOS/Turbo/etc) as well as a custom map to make sure everything is safe. As you can imagine, oxygenated fuels tend to lean things out because they carry in extra oxygen. So, a custom map is a must.

Basically, don't focus in too tightly on octane ratings... they are only one part of the equation.