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So where did the final Gen 3 power value end up at?

I see we may still need to mix fuel.

At the rear wheels, over 130hp (your mileage may vary). No need to mix fuels if you can get 93 octane (we in California can only get 91 easily so some minor mixing with 100 may be desirable.)

Mixing fuel increases the cost of the race weekend by about the cost of a fast food lunch combo for you and your 2 buddies.

Mixing 4 gallons of 91 ($4.50ish per gallon in CA) with 1 gallon of 101 or 100 (about $9.50-$10 per gallon depending on the track) gives you exactly 93 with 101 and damn close with 100. Figure 15-20 gallons to get you through the weekend. I don't see how the $15-$20 is a big deal?

Maybe it is the availability of the race fuel? However, I have never been to a race track that does not have race fuel. Even the ones with just porta johns and only hot dog carts for food service sell high octane fuel.

MikeMiz11 wrote:Mixing fuel increases the cost of the race weekend by about the cost of a fast food lunch combo for you and your 2 buddies.

Mixing 4 gallons of 91 ($4.50ish per gallon in CA) with 1 gallon of 101 or 100 (about $9.50-$10 per gallon depending on the track) gives you exactly 93 with 101 and damn close with 100. Figure 15-20 gallons to get you through the weekend. I don't see how the $15-$20 is a big deal?

Valid point. But if I had a dollar for every time the regional Club Racing Board rolled out a new $20 expense to club racers with the justification that, "It's just another case of beer," I could probably buy a couple cases of beer.

No 100 octane availible at CMP a couple weeks ago (well, they supposedly had it but that pump was screwed up). I ended up mixing with a bit of leaded race fuel, which is kinda illegal I think. Finished last in class, as it was my first time at CMP, but if you want to protest me...

It not just extra cost, it's extra time juggling the different fuel cans. But I guess the engine is not de-tuned like it was originally suggested it would be, so at least we're getting a bit more performance for the effort.

Do NOT under any circumstances use leaded racing fuel. You will foul the O2 sensor and the risk of bad things happening is significant. Unless you're in California or Colorado, plain pump gas is perfectly adequate (at 93 octane) and even if it's less, it's the lesser of two evils.

If you've done so I would recommended dumping the tank, flush several times with unleaded fuel and replace the O2 sensor immediately.

And yes, you're in violation of the GCR and could be considered a drive train violation. We had fuel tested at the last Majors event so this is something that's taken seriously (along with other funny stuff with fuel that we all know well from the Gen2 side.)

Mine is still a Gen 2, and it was a weak mixture, if that matters.

For the Gen 3, if good 93 is good enough, but 91 is not, I wish they would say that. Rather than the not very helpful "guidance" below:
"We have done our best to achieve high level of performance and maintain reliability. Our recommendation is to use only the best quality premium unleaded pump fuel you can buy. If in
doubt of the quality of fuel in your area, a 20 to 40 % mix of 100 OCT unleaded with 93 / 91 octane
unleaded should be safe."

I doubt everything.

BFun wrote:I doubt everything.

If you want real AKI numbers, the company I work for does that testing. We can take the discussion offline if it is something you are interested in.

Cheers,
Chris