Anyone running race gas mix?
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9 Second Club
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Joined: Jan 2017
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From: Independence, KY
Anyone running race gas mix? Looking to push my setup as far as I can this year and planned on running a 50/50 mix of 93 and 110 leaded race gas to give me 101 and to help out with detonation.
From everything I’ve read mixing the 2 is no problem. I’d be measuring this out as perfect as possible every time and figured that would be alright?
Talked to my tuner this morning and he said he doesn’t recommend it due to consistency issues and that if we are leaning on it we want it to be as consistent as possible.
Anyone have any experience with this? He recommend unleaded race fuel but not sure locally if it can be had and I’m not looking to dump $900 on a drum of VP ms109.
I dont have the fuel system to keep up with e85 this year and I’m not spraying meth right now
From everything I’ve read mixing the 2 is no problem. I’d be measuring this out as perfect as possible every time and figured that would be alright?
Talked to my tuner this morning and he said he doesn’t recommend it due to consistency issues and that if we are leaning on it we want it to be as consistent as possible.
Anyone have any experience with this? He recommend unleaded race fuel but not sure locally if it can be had and I’m not looking to dump $900 on a drum of VP ms109.
I dont have the fuel system to keep up with e85 this year and I’m not spraying meth right now
Thread Starter
9 Second Club
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From: Independence, KY
On The Tree
Joined: Jul 2017
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Likes: 2
I have a lot of customers who do this with great success over the last 15yrs or better. Lots of them are street/dune toys that drive out on 93 and half it with 110 when they arrive to the dunes. Leaves a lot of room to make more power safely.
TECH Apprentice
Joined: Apr 2016
Posts: 313
Likes: 16
From: Lincoln, NE
Interested to hear peoples outcome on this topic as it seems to be fairly debated by some. I'm 11:1 on a LQ9 408 and it's tuned on 91 but have noticed an inconsistency with 91 around my area. I would like to invest in a drum of something to mix with but have been told by a few tuners never to mix. But maybe it's the old school in me, I can't understand how or why mixing with 91 even if it's only tuned on 91 can be harmful.
Now I do understand that the burn rate and specific gravity can very a lot and that could have an impact, but I would think the added octane would be a better safety cushion especially when running it harder. I'm leaning on something from VP like MS93, C10, or C20 which these are all unleaded and non-oxygenated fuels.
My car loves to idle and cruise fairly lean (cam has 25 degrees of Overlap) so I'm sure based on that I run a little leaner than some race fuel would defiantly carry some added benefits over just higher octane.
Maybe a Race Fuel Vendor might chime in on all this?
Now I do understand that the burn rate and specific gravity can very a lot and that could have an impact, but I would think the added octane would be a better safety cushion especially when running it harder. I'm leaning on something from VP like MS93, C10, or C20 which these are all unleaded and non-oxygenated fuels.
My car loves to idle and cruise fairly lean (cam has 25 degrees of Overlap) so I'm sure based on that I run a little leaner than some race fuel would defiantly carry some added benefits over just higher octane.
Maybe a Race Fuel Vendor might chime in on all this?
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I run the methanol injection system. It turns on at about 3lbs of boost and it shoots 50% or so and once it hits 5lbs or more of boost it is spraying 100% methanol. At least that is how i think they set it up, if not pretty close to it. It allows me to keep the methanol in a seperate tank and only spray under full throttle. It does last a long time if you just daily drive it with every now and then punching it. I have raced at the track with a full container, ran 4 times and still had more left in the tank for more races. Just my two cents on what i run.
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Staging Lane
Joined: Aug 2010
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I too am interested in this. My sbe 6.0 (dished) s475 was tuned on 91 plus meth injection at 14lbs. I have been running 110 race gas at the track as “insurance”. Additionally I was thinking about upping the boost to 16-17lbs when at the track on 110. Have those been ignorant assumption(s)? I also run ms gold box auto tune on all the runs.
Ever think about Torco? My car pings under WOT when it's hot out. After the second year owning it I started putting this in when I filled up, maybe a quarter can but I'm mostly stock, and have never had a problem since. We retarded the **** out of my friends high comp 350 in his Camaro and couldn't get it to stop pinging as well. Same thing - splash of this and no issues. I think it's legit. It's not like the **** you buy at walmart.
I'll usually top off my tank at half empty with some Trick 100 that a local gas station sells out of the pump on my way to Mexico. 
Quick and easy and gives me a little safety net when the sticky tires are on.
Quick and easy and gives me a little safety net when the sticky tires are on.
Restricted User
Joined: Mar 2014
Posts: 7,192
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From: Ohio
I always poured a bottle of VP Maddative Octane Booster into the tank when doing dyno runs in my Nova. Sometimes there would be 30+ pulls while hammering out shift points, timing curves, etc.
93 with water/meth usually over 20 PSI with 10:1 compression and NEVER any signs of knock. I assume the stuff works, and being a VP product I'm at least a little inclined to trust them.
93 with water/meth usually over 20 PSI with 10:1 compression and NEVER any signs of knock. I assume the stuff works, and being a VP product I'm at least a little inclined to trust them.
TECH Apprentice
Joined: Jul 2017
Posts: 312
Likes: 14
From: Stephens city VA
e85 not an option ? thats what im gonna use . i know race gas is expensive . when i had my srt4 i had a meth kit set up . i tried running denatured alcohol in it . it didnt mix well with water an was very inconsistant . winsheild wash did pretty good tho
Thread Starter
9 Second Club
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From: Independence, KY
I’ll be out of pump and injector if I run e85.
race gas is expensive but the car really only sees the track with the occasional drive to work here or there. Honestly it probably won’t see the road at all this year though.
race gas is expensive but the car really only sees the track with the occasional drive to work here or there. Honestly it probably won’t see the road at all this year though.
Interested to hear peoples outcome on this topic as it seems to be fairly debated by some. I'm 11:1 on a LQ9 408 and it's tuned on 91 but have noticed an inconsistency with 91 around my area. I would like to invest in a drum of something to mix with but have been told by a few tuners never to mix. But maybe it's the old school in me, I can't understand how or why mixing with 91 even if it's only tuned on 91 can be harmful.
Now I do understand that the burn rate and specific gravity can very a lot and that could have an impact, but I would think the added octane would be a better safety cushion especially when running it harder. I'm leaning on something from VP like MS93, C10, or C20 which these are all unleaded and non-oxygenated fuels.
My car loves to idle and cruise fairly lean (cam has 25 degrees of Overlap) so I'm sure based on that I run a little leaner than some race fuel would defiantly carry some added benefits over just higher octane.
Maybe a Race Fuel Vendor might chime in on all this?
Now I do understand that the burn rate and specific gravity can very a lot and that could have an impact, but I would think the added octane would be a better safety cushion especially when running it harder. I'm leaning on something from VP like MS93, C10, or C20 which these are all unleaded and non-oxygenated fuels.
My car loves to idle and cruise fairly lean (cam has 25 degrees of Overlap) so I'm sure based on that I run a little leaner than some race fuel would defiantly carry some added benefits over just higher octane.
Maybe a Race Fuel Vendor might chime in on all this?
The most convenient method is to use either of these products .Keep a few in the trunk and use when needed
race-gas.com/
https://boostane.com
race-gas.com/
https://boostane.com
Racegas is a additive. It takes 87 or 89 and bumps it up to over 100, depending on how you mix it, so there is no lead in it. Based on the actual title I think this is what the OP was talking about, but I guess he could be talking about fuel you actually buy at the track. Based on the pricing, I will just be using the actual race-gas addative. I have heard good things about it.
TECH Fanatic
Joined: Jun 2003
Posts: 1,869
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This is what Sunoco has to say.
https://www.sunocoracefuels.com/tech...ulating-octane
Another thing to consider is the FPR when using Race gas and/or E85.
Some fuel pressure regulator vendors say that race gas is very destructive to the components and the diaphragm valve material inside the FPR - so perhaps a good idea to make sure your know what type of valve is inside the FPR and then check the diaphragm regularly for pin holes etc if you plan to use Race gas or E85. I would not want the valve material to fail when under boost.
See section three - materials.
https://www.turbosmart.com/news/how-does-an-fpr-work/
https://www.sunocoracefuels.com/tech...ulating-octane
Another thing to consider is the FPR when using Race gas and/or E85.
Some fuel pressure regulator vendors say that race gas is very destructive to the components and the diaphragm valve material inside the FPR - so perhaps a good idea to make sure your know what type of valve is inside the FPR and then check the diaphragm regularly for pin holes etc if you plan to use Race gas or E85. I would not want the valve material to fail when under boost.
See section three - materials.
https://www.turbosmart.com/news/how-does-an-fpr-work/
Last edited by dlandsvZ28; Mar 1, 2019 at 09:38 AM. Reason: edit content
