I can get 108 OCt leaded race gas at my local dealer.
He said thats a no no for the cats I was going to mix
it 2 (91) one (108) before I found out it was leaded.
Is that correct about the cats?
He said he could get me unleaded100 but I have
to by the drum at 55 gals a pop.

 

OG:

Do NOT, under any circumstances, use leaded race fuels in these cars. This is a big-big, no-no,...

Stick with unleaded race gas; Unocal 100 or Sunoco 104 for your car and mix either one 50-50 with 91 pump gas. Your TT will thank you for it with much improved and consistent performance.

Leaded fuels make a huge mess in the combustion chambers, on pistons, inside turbochargers and of course, will ruin the cats & oxy sensors very quickly. This stuff is only for race cars that truly need 108 and higher,....

 

Well I cold use on the BBQ
My dad used to do that while smoking a cigarette!
back in the early 60's
Thanks Steve. I knew an Expert would guide me.
I did not know it would be THE expert!

 

Sorry for the newbie question, but is mixing gasolines(octanes) to achieve a target octane as simple as adding the two being added and taking the average?

 

Yes....

But don't use any of those 'octane boosters'. Just mix the different fuels together.

Rick
WWW.993TT.com

 

Mike:

Rick is right on here,.... Good advice to live by.

You might look at the "Let's Talk About Porsches" http://www.rennsportsystems.com/2.html page of our website and read the pages on fuels, octane and timing. I think there is a matrix chart that shows the resulting octane when 91 and 100 octane race fuels are blended.

 

Steve thank you- thank you- thank you for hanging around here!
it makes me feel better about the money I just spent!

 

OG:

Why,...its my pleasure...

I'm happy to help, anytime.

 

Paul,

You don't need to buy a 55 gallon drum of 100 octane race fuel; Unocal has several stations in California that sell it at the pump. Do a goggle search and see if there are any stations in your area. For me, there is one in Agoura, where the 100 octane is $4.25/gal. I mix 1:3 with 91, to get about a 93+ blend. I figure that each tankful costs me an extra $10 or so. Your new TT will love you for it.

 

Steve,

Thanks for the pointer! Like alot of the good advice on this forum, its been invaluable.

Cheers.

 

The last three times that I filled here in LV I added 3 gallons to 10 of 91. After 1 1/2 tanks the car was running awesome, smoother, faster it was loving it.
Yesterday I drive down to Riverside and have to fill up with 91, did some running around and topped off before I came home. There was a noticible diference in Performance on the way home. I Was still able to dust the C5 corvette though so all is well.

In the morning, she gets a treat at the 76 station.

Pete

 

Steve or Anyone,
Can someone provide a name of a gas station in Seattle that sells Race / high octane gas.

Thxs

- james

 

James are you back?? where are the pics??

 

OG - LOL, yep I am back.
Flew in late Saturday night, I should have the pictures up in an hr or so.
More will follow tomorrow
Keep your eyes peeled for the post.

Regards

- james

 

Flew in?? I thought you drove it back??
what was I thinking??