Road trip...I was getting over 400mi to the tank! I usually get around 225-250 mi to the tank, but that's GETTIN' IT!!!



No boost, and cruising around 3k rpms 80 - 85 mph, I guess.



Oh and the kicker, my O2 sensor is unplugged.



any thoughts on running 87 oct for road trips?

Should be able got get better milage on 87 with its faster burn rate. I got more power out of it this summer during the Phoenix gas shortage. As long as you dont go boosting your ass off you should be fine highway cruising with it.



24 is some good milage, I hit that one time ever and that was going through the mountains in Colorado, a couple hundred miles of mostly all down hill is what it took me to get that. Usually I do about 22 on the highway cruising at around 80.

That's what I thought too...



I bet even after I filled up with 93 again...I'd be paranoid to boost again, haha!





I hear it's better to test emissions with 87 too, but I've heard too many horror stories of cars getting raped on the smog dyno https://www.nopistons.com/forums/pub...DIR#>/ohmy.png boosting and what not when not needed.





24 mpg is the best I've gotten out of any car I've owned!!



3 Jeeps (now a 5.2L V8) and an FC and who would of thunk the FD takes the cake?!?!

a boost controller would really come in handy, becuase if you are running higher than stock boost your going to want to have 93 octane. When I tune my car, I'm going to have a low setting at 8lbs, and a high of 14.2. On long road trips, only use the lower setting and run 87 octane.



Hook up that o2 sensor!!! you'd probably be seeing more like 27,28. Everyone forgets that just about any properly tuned motor can get great gas milage just cruising all day.

I wouldn't feel comfortable boosting 8psi on 87... (I have 10psi and 13psi)



Now that I think about it, I could put a rev limit at 4k when smoging the car...but still could get boost, so?????



My car (95) doesn't run properly with the O2 plugged in...the old school piggyback I'm running. Believe me, I'd like to have it plugged in...but until I upgrade, the O2 only gets plugged in when I go get smogged, and the guy just thinks my car sucks https://www.nopistons.com/forums/pub...DIR#>/wink.png

your 02 may just be old. I left mine unplugged for awhile until I changed it. It did help out a little bit, but not enough for me to worry about getting a brand new 02 sensor.

1st one had 46k mi on it...



2nd one was heated...



No dice, it the piggyback.

Tech question: how does the 02 sensor relate to boosting? Why take it out/change it when boost is manipulated?



Is it along the same grounds as MAP and MAF with BOV's?

24 mpg?



i got 3 mpg lapping at shannonville the other day. The car never dropped below 4000 rpm. And exiting corners = full boost

=)

it relates to emissions stuff...the ECU takes feedback from the O2 and leans it out for the best possible MPG and "emissions burn"



The ECU doesn't take feedback from it under hard accel or boost.