With the alarm output on a Zeitronix WB, you don't "need" a gauge (it doesn't come with one with their basic kit anyways). Just set the alram trigger points and install the buzzer/LED indicator to alert you if things go REALLY wrong...like in Bryans case.

 

I changed my timing map today to look similiar to mrfred's map and definitly noticed a difference on my drive to work. Much easier to stay out of boost while cruising. I did notice that I have a different exhaust tone during acceleration, found it interesting. Almost sounds meaner/deeper.

Next task is to wire the LC1 into my ECU to make logging easier.

 

Yeah, it definitely helps noticably. I'm tinkering with MIVEC now.

 

yea adding ignition changes exhaust tone...i also noticed this lol

 

I just got 385gal to a tank and equating this figure PROPERLY, came out to 29mpg, 95% hwy use .

 

Thats awesome, with the standard 14.7:1 closed loop I got between 300-320 mile before my light comes on. I fill up every week and checked my gallons to mileage and I averaged about 23MPG on the standard 14.7:1 setup. I gotta test it with a leaner AFR setup (been lazy,lol).

 

Funny thing is, I haven't even touched my fuel maps, (they are OEM) and lean spool is ENABLED. No closed-loop changes or anything fancy like that; driving at -30 vacuum @65-70mph the entire way -when on the expressway and zero boost when on the street of course (man that was HARD). I've backed this up on my last three fills all avg around ~27mpg with the same driving habits.

 

Yah, I haven't touched my fuel maps yet either, just used the zeitronix NB simulator set at 15.5.

On the last tank (a camping trip) I managed 28.8 mpg. That was with a ton of elevation changes (from 4,000 to over 10,000 ft), average cruising speed of 80mph, and the a/c on. Oh, and one jaunt from 75 to 145 in 5th... on a closed course of course

I've yet to add additional timing for cruise, I think that will be the next step (along with a clean air filter... lol). In town as of late I've been getting 22-24mpg, but that is with me driving "normally", i.e. fast starts, etc. We'll see what I can get in-town if I can stay out of boost for a bit.

 

I'm amazed at the mileage you guys are getting. I only get 20.0 mpg cruising around town with my tune and 14.7 afr for cruise. That's staying entirely off boost. What tire pressure are you guys running?

 

I think that's normal for around town.

I notice a HUGE difference with mixed town/freeway compared to 90% freeway. I'm talking like 6-7mpg difference.

The speed also makes a huge difference. 65-70mph gives me great mileage. As soon as I go over 75 my mileage drops a ton.

My last tank, on 100 octane, tuned for 15.2-15.5 at cruise and higher cruise timing, I made 19mpg with mixed town/freeway driving, this included a ton of 29psi WOT romps as well.

 

36/38psi HOT.

 

35psi front and rears, cold.

 

I am getting 12.7L per 100km's which I think works out to about 18mpg.

that is mainly freeway + a few WOT pulls..

 

I run 37psi cold, which ends up about 40psi when the tires have good heat in them.

Do you do stuff like leave the car in gear coming to a stop so the injectors shut off? That helps a bit.

I've never had a whole tank where I stayed out of boost in town, but like I said I still net 22-24mpg, so it's weird if you're only getting 20 with no boost at all.

 

How did you calculate your mpg? What I do is fill up the tank and top it off by 0.5 gallon after the first cut-off of the nozzle. Then I drive until the light comes on and re-fill from the SAME gas station and the SAME pump using the same proceedure.

So far I have averaged 26 mpg in two tanks with 70/30 freeway/street driving. I drive the speed limit or slightly less. Here in SoCal the speedlimit is 65 mph. I do not go into boost and keep the car in max amount of vaccum on the gauge.