Race Gas

4963 Views 15 Replies 8 Participants Last post by mrblankie, Jul 19, 2016

Stirz

Discussion Starter · Apr 17, 2016

Because I'm giving up more than a few pounds to some of my competitors, I'm considering running race gas this season to try to narrow the 'tonnage gap'. One 14 year old I race against (and he's a great kid and skilled rider) weighs about 95 lbs and just kills me driving out of the corners. I tried sneaking some bricks and old chains into his belly pan, but got caught by his dad so I have to try something else.

I ran VP MR12 in the tired old Ninja two-fiddy a couple of seasons ago, so am familiar with it, but have no experience with these: VP Moto or VP MGP. Anyone have any feedback on them? Thanks

Reactions: 2

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Matthew Crowe

· #2 · Apr 17, 2016

Did you ask Mr. Spears?

CBRpilot

· #3 · Apr 17, 2016

Are you serious? :|

After all the lecturing about "PREMIUM vs REGULAR gasoline" in that other thread... you are thinking about running RACE GAS ?!?!?

:laugh:

Reactions: 2

Stirz

Discussion Starter · #4 · Apr 18, 2016 (Edited)

Guilty as charged - what can I say?
(It is a race bike after all - and those fuels are rated as 87 engine octane so it's not like I'm upping the octane - I'm going to plead the 'get out of jail free card' on this one)

vercify

· #5 · Apr 18, 2016 (Edited)

Stirz said:
Guilty as charged - what can I say?
(I'm going to plead the 'get out of jail free card' on this one)

lmao, pretty much the only option :nerd:

Reactions: 1

Capitalview

· #6 · Apr 18, 2016

Race gas is oxygenated and will actually give more HP. Higher octane fuel is only effective with higher compression engines.

I don't think VP sells Moto or MGP in the US. It seems to be a European thing. At least I couldn't find it on the VP website for sale.

Guy from the local forum I am on took his 2014 Ninja 300 to a tuner and used pump gas (not sure what octane) and MR12. Quote below.

"So basically - stock airbox with stock filter or K&N on pump gas, 39 hp. Stock airbox with stock filter or K&N on MR12 is 43 hp. Airbox pulled, pod filters and MR12 is 46 hp."

Reactions: 2

Stirz

Discussion Starter · #7 · Apr 18, 2016 (Edited)

Thanks Cap, good info as always. (that's a pretty big Hp gain from ditching the airbox - not legal for the classes I'm running though). MR12 is readily available, but had not heard of anyone using the others so threw it out there just in case.

Information for those who may want to learn a bit about race fuels and remedy some misperceptions (ie; T.O.O.T.A.):
http://www.vpracingfuels.com/motoroadracing.html

Capitalview

· #8 · Apr 18, 2016 (Edited)

Remember, MR12 is a leaded fuel. If you use it, it may hurt your O2 sensor. If you use it, get it tuned for it and pump gas, use a map switch and plug the O2 sensor bung.

Reactions: 1

torrid_pace

· #9 · Apr 18, 2016

ya'll so knowledgeable yo!

CBRpilot

· #10 · Apr 18, 2016

torrid_pace said:
ya'll so knowledgeable yo!

Capitalview = THE FORUM SENSEI

Reactions: 1

Capitalview

· #11 · Apr 19, 2016

CBRpilot said:
Capitalview = THE FORUM SENSEI

Ummm, no!

That title I would give to Mr. Spears when he actually has time to chime in.

Reactions: 1

Stirz

Discussion Starter · #12 · Apr 19, 2016

Gregg is planning to do a dyno with MR12 soon. I've used it before, and am running a Bazzaz with no O2 sensor, so am good for those issues. I was really more interested in the other (unleaded) fuels as I didn't know of anyone who had used them. I'm mapped for pump gas now, so just need to test and map for MR12 and see if there is a noticeable difference before go time. Thanks again Cap.

Reactions: 1

racerrrrx

· #13 · Apr 19, 2016

If I find myself racing for podiums and within .5 sec./lap of the guys I'm chasing I'll spend the money for U4.4. MR12 makes more power, but gawd it's spendy, and as I understand it you can generally get away with pouring in U4 without a remap and get good gains.

Capitalview

· #14 · Apr 19, 2016 (Edited)

The one thing I hate about race gas is you have to drain it after you are done. Plus, unless you know your tank is empty or you drain it, you are just diluting it with pump gas.

IF I were withing a half second of the fastest racers I might think about it. Not sure that is what would make the difference though. Working my fat off is going to be a better investment.

Maybe save up for some lipo instead of the race gas!

8 lbs = 1 hp!

Reading info on U4.4 says you usually need to rejet (carbs). So I am guessing you would need a remap and map switch.

racerrrrx

· #15 · Apr 20, 2016

That's the beauty of FI, it adjusts itself (to a point). Lots of racers practice on pump and race on U4 with the same map, I've done it on SV's with great results.

mrblankie

· #16 · Jul 19, 2016

i know 2 teams in the cmra endurance running mr12 in their r3's... they wont tell us how much power their making but its gotta be good to have a 500 dollar gas bill : )

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