Having gone from HKS 272s to 280s, I opted for a very different setting for cam timing. Whereas I previously had my 272s set at -3/-3, I timed my 280s at a rather unorthodox +2/0. I did this deliberately for the purpose of enhancing midrange power. To say this was successful is an understatement.

Aside from picking up a great deal of torque, my fuel economy has improved measurably. Previously, I could expect around 300 miles on a tank at freeway cruise (75-80mph). Now, despite the fact that the car was loaded and was driven through hilly terrain, I managed 340 miles before the reserve light came on. Previously, I had driven 25 miles on reserve, and can now manage 30-40, which gives a range of 370-380 miles per tank. This equates to 28-29mpg, which is exceptional given the power level and low gearing.

Not too shabby considering the car is now capable of high 11s.

 

Fantastic!!!

 

How effectively does that timing setup work with the Methanol injection running?? Awesome mileage numbers considering your number of Mods and obviously HP if you are running 11's. Wonder why I am lucky to get 240-250 before the fuel light comes on, and a measley 25-30 miles after that before I call AAA.

 

Wow 340? i only get about 240 probably maybe not even that for a full tank

 

That's some motivation to get those cams! How's the idle?

 

The idle is a bit choppy, but the low end is strong.

This particular timing configuration works very well with the methanol injection. Because the torque is so strong, making all-out launches on boost is relatively easy. The downside is it's that much tougher on the factory clutch (which is now on borrowed time).

Similar settings with 272s should give fairly comparable results.

 

Ted,

I went with the 0/-2 setting with my 272's this weekend as we talked about. Same tight LSA as your 280's but retarded some to get some more top end. Needless to say my results were very good. I'll be running at the track this weekend to see what she'll do.

- Steve

 

WOW! you are getting 24mpg in your modded Evo. Pretty awesome.

Either you drive easier than I do or i really need major tuning with mine. Since stock my average is around 18-20mpg.

 

Actually, I'm getting 28-29mpg.

 

wait... 300+ miles to the gallon... i start celebrating n crap when i hit ANYTHING over 201 miles on the tank... you people have like super fuel or something over there in the east coast

 

Ted,

Do you think your MPG has more to do with the Alchy injection than the cams?

Bobby

 

^^ lol...thats nice man...28-29mpg?? thats like WOW for an evo running 11s

 

No, simply because the meth injection is not activated until the boost level reaches 11psi. The high mpg has more to do with the cams and the timing thereof, which has increased the off-boost response tremendously. The car feels far more like a V8 in normal driving as opposed to a small 4-cyl that begs to be shifted.

 

Damn it.... i guess I will have to think about upgrading my cams then... just for the increased gas mileage!

To think.. I was "almost" done with mods.

 

i only get like 210 miles out of city tank and 340 on highway, stock cams