Provided similar driving styles, are you guys experiencing worse gas mileage with cams? I commute 70 miles a day so if there truly is a hit gas mileage wise, I will have to stay away.

 

My mileage decreased about 2mpg, My clutch is slipping at the moment, so driving extremely conservatively, Im averaging 18.5 mpg. Before it went out I was getting roughly 13.5 mpg.

 

yeah i'm getting around the same, 13.5 and my clutch is new so now slipping issues here. Mostly after getting the Walbro fuel pump my mileage suffered, then i got cams and they seem to suck more gas down. However, it could be because its just so much fun to haul *** with the new cams and tuning. Even after the tune, i'm getting similar mileage. highway is a different story, i get close to 22mpg there

 

Wow, I thought my 19.5 mpg was horrible with these outrageous gas prices.....

 

My mpg has increased since cams (264's). I also had my ecu "xflashed" by vishnu @ the same time too.

My evo is my commuter, 100% city driving:

100% stock = 185 miles per tank +/-3
tbe, cams & xflash = 210 miles per tank +/-5

 

I am getting worse because I can't stay out of the damn throttle. It pulls so F'n hard.

 

For the first time, I actually got 280 miles to a full tank. When it was stock, I barely got over 220 miles to a tank. I have 264/272 cams among other mods.

 

I have 264's and get the same or slightly better gas mileage.

-Paul

 

2-3mpg better with cams on the highway , 22-23mpg b4 , 25-26mpg after .

 

I get about 24 miles to the gallon, and its stayed that way when I put the cams in, I'm hoping it might be better when I get flashed, cause I drive 55 miles to work one way.

 

I have the HKS 280 cams. My fuel economy (Hwy) is approximately 29 mpg. I am getting about 370-380 miles per tank.

It's all in the timing and tuning.

 

^^^^holy ****

 

Hell yeah, if you stay outta boost then you're going to incease but if you get on it which you probally will due to the new toy you've installed you're gas is going to go down Very nice mileage Ted B

 

Man, I'd like to know how you do that! I have a Vishnu Stage 1++ car with the 10.5 hotside custom tuned and I get around 19-20mpg around town. On the Highway, I get around 21-22mpg. How do you drive your car? Do you really get into the throttle at all?

 

For starters, I timed my cams deliberately to deliver a lot of torque and force the torque peak down in the power band. Because the car is so damn torquey, I can drive even in hilly terrain and never need to be in a boosted situation to maintain speed. I don't know what the static cylinder pressure is, but the starter is telling me it's a lot.

Secondly, I drive the car very sanely. At freeway speeds, I maintain 75-80mph. Again back to cam timing, with the torque peak occurring at a relatively low 4400rpm, the efficiency at 80mph (~3500rpm) is closer to peak VE, which gives snappy response AND improved fuel economy.

In short, it feels very V8-ish, not like a whiny 4cyl that needs to be constantly shifted.