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Shell V-power Racing

Lazy-Bastard
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Lazy-Bastard Grand Master

Lazy-Bastard

Posted
Posted

I just filled up with V-Power racing for the first time (normally use BP ultimate).

I don't know if it's a coincidence or what but the car is driving like absolute crap. It started off missing as soon as I made any boost and deteriorated to the point where it is even missing at idle now.

The car was tuned on BP ultimate and has never run on anything else since then. Does anyone think the fuel is to blame?

I spoke to a friend who is fairly cluey with this type of thing and he said his Bosch 040 didn't like the V-Power racing either and mentioned something about ethanol enriched fuels being thicker than those without.

Anyone got any ideas? I advanced the timing a few degrees and that seemed to improve things slightly, but it still wasn't anywhere near behaving normally.

Either way, I am going to dump the fuel and go back to Ultimate and see if that resolves the issue.

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https://www.sau.com.au/forums/topic/170793-shell-v-power-racing/
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r33_racer Grand Master

r33_racer

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Posted

possibly because its a higher octane fuel, better then anything else offered on pump. Harder for it to preignite, or even ignite for that matter. Hence why the tuning is normally required. Vice versa if you were to stick a low octane crappier fuel in then what you were tuned on originally, it would preignite and ignite a great deal easier, generally when knock sets in the most.

Beer Baron Grand Master

Beer Baron

Posted
Posted

i've never had a problem. my GTR was tuned on 98. i put in the V power racing. ran fine. maybe even a touch better. the alfa race car, we had it tuned (yes it has carbies and a dizzy!) on 98. we've since run it on the v power racing and elf LMS and it was fine. It's not a major change I can't see how it made your car run poorly unless it was just a bad batch of fuel.

mad082 Grand Master

mad082

Posted
Posted

if it is pre-igniting you have a problem with a cylinder/piston. i think you mean detonation. they are 2 different things. pre-ignition is where there is a hot spot in the bore or piston that is igniting the fuel before the spark. on cars with carbies they will continue to run after you turn the key off untill the hot spot cools. and it melts your spark plugs, and usually ends in a warped head/cracked piston. detonation is where the fuel doesn't burn in a even pattern. instead of burning in a wave it just all ignites at once.

i don't think the tuning has anything to do with it, otherwise normal aussie built cars would run like crap when you put ultimate in there since they are only tuned for 91 octane fuel. i'd say it is a bad batch of fuel. i stopped using shell fuel after i went to a servo one night and an ambulance in front of me started then stalled before it got out of the driveway after filling up and wouldn't start again. it turned out there was water in the fuel. not sure if it was the servo's fault of a bad batch, but after that i stay clear of it just to be on the safe side.

r33_racer Grand Master

r33_racer

Posted
Posted

ok i always thought that both were to do with the fuel mixture burning before it is intended to. ie. before the spark plug ignites the air/fuel mix. Whether it was to do with a hot spot or just the fuel burning unevenly was irrelevant. Thought it was the act of it occuring rather then what caused it. Suppose you learn something new everyday.

Lazy-Bastard Grand Master

Lazy-Bastard

Posted
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Posted

Thanks for the help, problem solved.

Stupid leaking cooler join.......Haven't driven it yet but it was literally hanging off :P I had the exhaust manifold off the other day replacing a blown gasket and mustn't have tightened one of the clamps enough.

I will stop bagging the V Power racing now :D

J-Boy Mentor

J-Boy

Posted
Posted

What fuel the car was tuned on definitely makes a difference, but i have ran vpower racing previously on my r33 and it ran good. My mate had issues with it in his bmw e46 325 though, he just tried it in his evo8 gsr yesterday and it seems to be running good as well.

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