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Old 07-21-2016, 04:00 PM   #1
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13:1 comp race fuel?

Put my 05 Trx 450 in the shop to get fixed and need to know what fuel to run when I get it back

My 450 is now a 480 and has a 13:1 compression. I got it from my buddy who I can't seem to get in touch with right now. He said to run 110 race gas. I have read some people mixing the 93 pump gas with a race fuel. I read that all I need is 102 octane. I have a vp racing pretty close by. What fuel should I buy from there? I'm not to excited about having to run race gas. I might eventually put it back to stock so I can run pump. I'm not a racer just like to play on trails and track. Any info will help a lot. Thanks
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Old 07-21-2016, 04:29 PM   #2
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is the ignition timing stock?
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Old 07-21-2016, 04:32 PM   #3
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ask VP
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Old 07-21-2016, 04:38 PM   #4
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Yes timing should be stock. I called vp and there was only a woman that had no clue what fuel I should run. She claimed there were no managers there to help.
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Old 07-21-2016, 04:41 PM   #5
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You called the retailer or VP fuels?
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Old 07-21-2016, 04:42 PM   #6
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Put M5 in it and add 100% to your map or jets. It has like 5% nitro methane. That's not a crazy amount of compression or anything. VP 98 would be ok but run the red 110 smells great
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Old 07-21-2016, 04:46 PM   #7
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I called vp fuels. There is one in elmdorf about 20 mins from my house. I to love the smell!
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Old 07-21-2016, 05:12 PM   #8
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The streetfighter has, according to the specs, 12.5-1 compression and the manual calls for 95 octane. There's lots of discussion about how octane is calculated but the general consensus is 92 octane premium works just fine.

Since you're only a little higher in compression, I think you'd be safe to try premium pump gas. If you hear ANY pinging back of the throttle and use higher next time.

To be safe, race gas is the best way, but you'd probably be OK with pump gas
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Old 07-21-2016, 05:42 PM   #9
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When I was getting my car built/ready for Hotrod Magazines Pump Gas Drags (invited 3 years in a row, tore up car right before each event) they were using Rocket Brand's 100 Octane. Forgot who it was at Hotrod but I was sent this simple spreadsheet. A guy that works at an Oil/Chemical company made it. You can mix the gas in ratio's to get the required Octane level you are wanting. Worked for me.

Now I just run 93 octane in the tank and a 1 gallon cell up front (for the nitrous) with 110 octane in it. Also Smileys up in the Woodlands has a lot of different octane levels.


https://dl.dropboxusercontent.com/u/...ne%20blend.xls




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Old 07-21-2016, 08:06 PM   #10
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Thanks for the replies. I have read that some people with the same set up will run their atvs on pump. I might try it or just try a mixture set up. Hope to get it from the shop soon and see how she runs
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Old 07-22-2016, 01:05 AM   #11
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You can call Casey Bruce with Build and Ride MX. He carries all types of VP and is mobile. He knows all about the different fuels as well and can answer any of your questions. 832-696-6362
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Old 07-22-2016, 07:04 AM   #12
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I'm now living just south of San Antonio. But will definitely give him a call for input. Thanks
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