VP Racing Fuels - Motorsport 103

[wreckedhead]

i was told for elf fuel which has a higher octane then c16 costs 12.50 a litre, something like 130ron

[Sydneykid]

Can't say as I've seen 130 RON, the unusual ones are;

AVSP11, that's 107 RON but mostly used in racing bikes (2 and 4 stroke).

AVGAS 2T, it's 120 RON, only used in 2 stroke racing, bikes, snowmobiles, water bikes, jet skis and outboards

AtmoBoost is 106 RON and leaded, but not oxygenated. Good for high rpm N/A engines that need lead.

So I think it must be TurboBoost at 115 RON, which was around $7 a litre last time I bought it. But it has been my experience that TurboMax makes better horsepower higher in the RPM range.

[2rismo]

So can anyone answer my questions?

Adrian

[Sydneykid]

Hi Adrian, I have not tried MS103 but looking at the data sheet it looks much like Elf LMS which I have used with much success. Oxygen content is good at 2.55%, it's a bit light at 0.744, so I don't think you could lean it out as much as LMS. The RON at 107 and MON at 99 indicate some serious ignition advance may be possible. The ECU would definitely need retuning to get the best out of it, you couldn't just stick it in the tank and expect to gain something.

Hope that helps:cheers:

[Emre]

When I try decent fuel, I just add extra ignition to the whole map, it takes 5 seconds.

[KamikazeR33]

sk: where bouts can u buy elf lms and how much is it usually?

[2rismo]

The ECU would definitely need retuning to get the best out of it, you couldn't just stick it in the tank and expect to gain something.

My name's not wreckedhead....come on

When I run on PULP, I take 4 degrees out across the whole map using the power fc's ignition trim function in the settings menu. This resets when I turn the car off. I am looking to avoid having to do that and save some valuable horsepower in the process.

What is the relevance of the "Motor Octane" everyone seems to quote? I am led to believe that PULP with a quoted octane level of 98 (optimax etc) has a motor octane of 89???

Thanks all.

Adrian

[Sydneykid]

When I try decent fuel, I just add extra ignition to the whole map, it takes 5 seconds.

It has been my experiecne that with an oxygenated fuel, particularly one with a high specific gravity, I also need to take some fuel out of it as well. It is the weight of the fuel that matters, not the volume. The ecu operates by varying the volume, so to allow for the extra weight I have take out some volume to get back to the correct weight.

Hope that makes sense:cheers:

[2rismo]

That makes sense. As I see it, this fuel will allow me to keep the timing into the tune whilst also providing a buffer against detonation.

That being said, I think I'll run it at the Nationals at the end of this month and see how I go. I have four passes to get it right before it gets serious.

Will post results and if I get time (doubtful) dyno comparisons on Optimax vs. 103.

Adrian

[Busky2k]

Guys dont get confused.

Some quick shiftin thru the net strongly suggests that MON is a better indication than RON of a fuel's resistance to detonation. Quick quote;

"The MON is a measure of the gasoline's ability to resist knock under sever operating conditions. MON affects high speed, part throttle and performance (under load such as in passing). The RON on the other hand, is a measure of gasoline's ability to resist knock under less severe conditions. RON affects low to medium speed knock and engine run-on (dieseling). "

VP's Motorsport 103 is some nice stuff. With a MON of 99, thats well over 10 units increase over say, Shell Optimax which is rated at 87.5. Motorsports RON is 107 by doing a lil math. Thats some serious fuel. VPs C16's MON is 117, and thats a whole new ball game again....

[DoughBoy]

Got some stats of the ET 102 bowser fuel:

RON: 102

MON: 90

Density: .778

Oxygen: 2.7%

Going by those stats, I guess it is slightly above Elf LMS but down on oxygen content on the TurboMax. What's the price on LMS?

[2rismo]

So the MON (or: MoreimportantOctaneNthat) is:

Optimax: 87.5

Doughboy Super-Fuel: 90

VP 103: 99

That sorta says to me that the VP really is worth nearly double the price as it offers more than four times the MON increase.

Thanks guys. Anyone else wanna add?

Adrian

[Sydneykid]

So the MON (or: MoreimportantOctaneNthat) is:

Optimax: 87.5

Doughboy Super-Fuel: 90

VP 103: 99

That sorta says to me that the VP really is worth nearly double the price as it offers more than four times the MON increase.

Thanks guys.  Anyone else wanna add?

Adrian

Hi Adrian, the problems I see with 103 is it is bit light at 0.744 which is 5% less than TuboMax and its oxygen content is way down (over 40%). The high RON/MON is not the only factor I would consider. I would say from the specs that 103 is designed for very high boost levels (2.5 bar +) on engines with big injectors, hence the high RON/MON and low density. TurboMax because of its much higher oxygen content, would work better in engines at lower boost levels (say 1.5 bar +). Due to its density level, it would definitely work better in engines with marginal injector sizing.

Horses for courses:cheers:

[2rismo]

TurboMax because of its much higher oxygen content, would work better in engines at lower boost levels (say 1.5 bar +). Due to its density level, it would definitely work better in engines with marginal injector sizing.

When you talk about higher boost, are you referring to a higher measure of total manifold pressure or higher cylinder pressures? I am only running 1.0 bar and standard Nissan injectors but the cylinder pressures experienced with the nitrous are far greater than a similarly powerful non-nitrous motor. If the higher oxygen content in Elf fuels will be advantageous, which one should I use that is unleaded and doesn't cost $100000/litre?

Adrian

[N I B]

We use VP anyone want to know how it goes PM me.

[Sydneykid]

Sorry Adrian, can't help you, I never use nitrous.

[2rismo]

I never use nitrous

No-one's perfect, mate.

Adrian

[Roy]

When I try decent fuel, I just add extra ignition to the whole map, it takes 5 seconds.

How much ignition...i ask because i want to start running crappy std unleaded instead of BP Ultimate/Optimax etc. Wondering how much ignition i should take out to allow for the lesser grade fuel?

[INASNT]

How much ignition...i ask because i want to start running crappy std unleaded instead of BP Ultimate/Optimax etc.  Wondering how much ignition i should take out to allow for the lesser grade fuel?

And y would you do that roy? You dont want your car sitting in a workshop again for a few months do ya??

[Roy]

And y would you do that roy? You dont want your car sitting in a workshop again for a few months do ya??

I very rarely even hit boost, so dont see why i should be paying $1.18 / L when i dont need the extra grunt ut may afford me