The sunoco on m59 in waterford carries 110 octane , if this is leaded will it harm my engine (I don't have cats). Also I'm getting a tnt wet system and was planning on using ramchargers timing tuner just to be safe. Could i dump that and just use high enough octane and be just as safe? thanks
mike

 

get ready to replace your o2's if you run leaded fuel!

 

yeah, dont use leaded fuel. its for cars w/o o2 sensors. just use octone booster instead. as long as its unleaded that is. Ive never read one of those bottles to see if its leaded or not. how much spray are you gonna use? if its 125 or less, you wont really need to lower the timing. just make sure its got premium or unleaded race fuel in it.

chris

 

... unleaded boost that actually mixes to TRUE numbers.
Also alot of tracks have 100 unleaded, but stay away from the lead. Puts too much weight in your gas tank!!

HInk

 

..or, if the car is "tuned" correct you could run the car in "openloop" and the o2's are not an issue.
HRH, run's open loop tune and bus loads of that heavy weight fuel.hahahaha

What sunoco on m-59 has the 110?
is it between airport and cresent lk rd?

 

Hey Hawk, how about a little more info on this "tune" I am having problems with the o2's and the oppurtunity to eliminate them makes me smile!

Q

 

I ran my old 94Z in open loop and had good luck with it. I sent you the program back when you were collecting them, but it has disappeared from your site. It's easy to edit into open loop, but you should probably install your own A/F gauge or at least hook one up temporarily so you can tune the car through the tables to the necessary mixture at any given RPM point and throttle position, etc. To go in open loop, just find the table that sets the temperature for the closed loop transition and raise it to 255 or something. From there on out, it uses the open loop tables

 

Timberwolf is correct on the open loop mode.
Just raise the "coolant enable mode for closed loop" to the highest value it will take. Then the car will never get that hot and it's open baby.
I spent probley 25+ hours tuning the "Openloop AFR" fuel tables with a wideband o2 box on the car to get the job done.
The following were where the factory o2's values reside while in operation "openloop".
At idle she's .450 mv
at light load cruise= .600~.680mv
moderate load cruise= .680~.750mv
wot horsepower= 855mv
wot nitrous=885mv
any decel the o2's will be around .200~.300

You will loose some gas mileage running open loop but I still pull down 19.5 hwy in open, but in closed loop it get's 23~24 mpg!!
which is bad azz in my book when you run a cam that's 262/268@.50, 647/685 lift, 113 cl, on a 114lsa

 

Thanks guys, might be something Iwill look into deeper. Sounds like a lot of work, but what hasnt been on this car yet.

Q

 

Thanks for all the replies, I was planning on using the 150 shot

Hot Rod Hawk: I'm new to the waterford area and don't know the crossroads yet, the sunoco is about five miles west of of telegraph

 

Leaded fuel pumps also have a larger nozzel so you can't put leaded gas in a car made for unleaded. Easily solved though.
I deleted my O2's too (actually my car only had one). I just did it a little differently

 

sunoco on van born has 110- turbo blue racing gas....the nozzle fits in a regular gas tank so i dont know if its leaded or unleaded....kinda expensive at 3.59 a gallon though

 

yep thats what it was called

 

Yup, just got back from the Sunoco station by my house (also sells Turbo Blue 101 and 110). Both nozzles are the same size! Never used to be! Well that's pretty cool.