Hello Guys,
I tried a mixture of 1:1 on pump 94 and MS109 a few days go. The car was noticeablely faster and more responsible. My car has FVD flash and catless exhaust. Just checking to see if it's safe to run before I buy some more. I read somewhere that oxygenated fuel will make the car run lean. what do you guys think?

Thanks in advance

 

Yes it will..
run a data log to find out the actual numbers...

 

funny you post about this cuase i may be having the same issue , im looking into it my self .

do a log on normal boost with pump , then do a log at the same boost with the ms 109.

 

Sorry if this is a stupid question, but what is oxygenated fuel? (just trying to learn)

 

Oxygenated fuels carry a much higher octane number and make more power when properly tuned than other fuels. The more oxygen you can get in the engine the more fuel you can burn, and the more fuel you can efficiently burn, the more power you can make.

 

I don't think it will make much of a difference. I don't know how heavily your fuels are oxygenated in Canada but in CA, it is 10% ethanol. That is, pump fuel is already oxygenated so by adding MTBE you're just substituting one oxygen source for another. If you look at my datalog with 50:50 pump and ms109 (that I posted on another thread) the afr's are right on the money. This is for a tune designed for pump fuel.

 

I think Sunoco Ultra94 up here is considered an oxygenated fuel. The downside is that fuel economy is lowered. There's an article I found on this subject somewhere...can dig it up if anyone really wants.

 

You will likely witness a fluctuation in injector duty cycle when running a pump fuel program assuming that the car is tuned in a similar fashion as the factory tune. This is because the 997T DME requests a target lambda and will adjust accordingly to meet it.

 

Yes that is exactly right. Fuel economy will be lower because there is less energy contained in ethanol than in your typical hydrocarbons that make up gas. So to get the same power you have to use more fuel. It's like the pharmaceutical companies. What do drugs companies most desire? Not to cure you from your addiction but treat it for life so that you keep coming back for more.

 

For those who have access to Sunoco 104- go for it.. we have a few years of experience with this fuel on high HP P cars... its great and affordable... we run it in our 700+ rwhp cars... sure ms109 will produce more power as among other things it leans the car out... but its also considerable more expensive... I believe it actually is 104 octane as well..

 

104 is what i run, its $5 a gallon cheaper than 109, runs greats

 

Thanks alot for the information guys! I called up FVD today and they said it won't be a problem at all; there's nothing to worry about. But I think I will do some data logging and see what's really happening.

 

Thanks TTdude! I only put in Chevron 94 Octane at the pump and it contains no ethanol. All other grades from 87 - 91 have 10% ethanol in it. I am going to do some logging tonight if I can get that durametric 6.0 installed.

 

What issues are you having?

 

Thanks Austin! That's really good to know! I have FVD tune, not sure how samilar it is to the factory tune. so my understanding is that no matter what gas that i have in the car, the dme will always look for the AFR that was set in the tune which will always be on the safe side as long as the tune i have is safe. right?