VehiGAZ

We are cursed with it up here.

After talking to Roger, I feel much better about the situation. A few gallons shouldn't be enough to trash the cat or the O2 sensor, but there is the slight chance that it will plate out on the catalyst, making it less effective. I guess we won't really know what happened until I have it tested again next year. If I fail emissions, I'll replace the whole mess with an x-pipe and new high-flow cats.

As for the fans, I'll look into the situation. It won't be my first issue like this - I've had more relay problems with this car than I have with all the other cars I've ever owned combined!

sweanders

There is no need to worry about ethanol blends, the fuel will still be as good as it's rating.

VehiGAZ

In terms of octane, that's true, but in terms of energy content, it's not. Ethanol has a lower energy content by volume than gasoline, so when they add the 10% ethanol, it is like diluting the gas. Horsepower and mileage both decrease. In my VehiCROSS, I consistently get a full 20% better mileage on non-ethanol conventional gas than I do on the ethanol-oxygenated crap they pump in my state. Unfortunately, I have to go further and further afield to find the good stuff.

hacker-pschorr

PCA Memorial Day DE I got into an argument with the owner of an 89ish 911 speedster when he saw me put 87 into my stock (except for headers) 79 track car.
He insisted that on the track you MUST run the highest octane available. I tried to explain that on the high end my car is 8.5:1 compression (I’m sure closer to 8:1) with stock, very conservative timing. He said that doesn’t matter, on the track you must run 93…..

Previous owner ran 110 leaded…..waste of money. Since there are no O2 sensors or cats he didn’t damage anything other than his pocket book.

If I crank up the timing a bunch, that would probably make higher octane necessary. That is assuming the car responds in a positive way to more timing. Next dyno day should clear that up.

James-man

Low compression and modest timing, sure it can handle lower octane. Without knock sensors, and assuming high demands of the engine at the track (higher temps, higher revs, more brutal driver), it might be good to be conservative with higher octane.

I wouldn't argue about it though. I wouldn't track my 32v on 87, but that is a different engine. Someone spooked me recently with the mention of the possibility (theoretically) of silent pinging. With modified exhaust, it is hard to hear anything in front of the driver.

hacker-pschorr

Higher revs? Everything above 5,000 is just noise with the 79

This was my first weekend with the car and I knew it was 100% stock. Next time the cam timing will be increased along with higher ignition timing (and colder plugs).

My temp gauge doesn't move from the lower mark on the track.

James-man

The noise of an OB with significant exhaust mods is pretty wicked. I am a fan.

hacker-pschorr

Ok, this thread is officially hijacked

http://www.erik27.com/79928/trackvid.wmv

James-man

Kewl.

Back on topic - would anyone track a car with e-fuels? Why?

Stan.Shaw@Excell.Net

A suggestion I would make (but have never followed myself) is to send a sample of the oil off for testing.

Stan.Shaw@Excell.Net

Indy cars...

John Veninger

Drain it and use it in non-cat engine. Burn it in your lawnmower of something like that. Find a kid with a dirt bike and give him a free afternoon of riding. Also can use it in a boat.

The 110 at LRP (and almost everywhere) is leaded. Typically you find one or two leaded gases at the track (110 and 112) and one unleaded 100.

sweanders

I know about the formulas being different, I guess it is being blended differently in the US than in Europe. I have been alternating between three gas brands here in Sweden for about 150.000 miles and see no real life difference in consumption.

928autobahndreamer

American Lemans Series runs E 85. At least in some of the cars. ie Vets

hacker-pschorr

I would tune my car for E-Fuels if it was a consistent blend and readily available near the track.

I'm not sure about other states but up here E-85 can range from 85% ethanol to as low as 50%.