Forged bottom end b18. 9.8:1 or 9.2:1 compression bored .25 over stock. Stock head. Run 93. As a daily i average about 14mpg mostly stop and go traffic with an occasional wot pull on the way to/from work.

curious if that seems really low/bad? My afr at idle is pretty good around 14.7, light throttle cruising afr is also more on the lean side. Car was tuned by Evans tuning so i trust his tune is good but not sure what others get dailying a turbo honda

 

How much power?

My S2000 was on a 5558 @ only 10PSI, probably low to mid 300s, and I think I was only getting about 15MPG on that. I questioned the tune a bit, but I definitely don't think I was running rich.

 

That is pretty awful. That 9.2 compression ratio isn't helping efficiency at all.

Try driving it a tank or two without getting into boost and see what happens.

 

That's terrible. My turbo car gets around 22mpg city and 30mpg highway. Actually more than my stock one...

 

"375k and counting."

To be fair, that could at least be a small factor lol. 15mpg average in my S2000 in city driving, which isn't totally awful on those cars but I'm sure the tune could have been optimized a lot better - It was a street tune on AEM.

 

About 360hp.
i guess ill try staying out of boost more and see how that affects it. I figure if im getting hypothetically in the 20s cruising, the minute i WOT im basically negative mpg so it averages out...idk

 

I was able to do 400 miles on 1 tank of 93 with my ek turbo 11:1 b16. GT2871. Pretty much 40mpg highway. It would get 30+mpg around town no matter how hard I drove it. My realistic average highway was more like 35-36mpg.

 

Likewise. Staying out of boost, ill get 35MPGs. Boostin around, maybe 20MPGs

 

curious what wheel/tire setup you had? I run 17x8 with a 225/45 all around so maybe that extra rubber + taller wheel isnt helping either

 

DANG!!!! im jealous. Im lucky to be close to 20 MPG- but i drive it hard and run E85. So right there I lose roughly 30%.

 

When doing your MPG calculations are you adjusting for tire size? That big of a tire is going to under report miles by 7.8%.

Makes that 14 mpg more like 15 mpg.

 

I think they are 205/45-16 toyo proxies, Enkei RS-5 wheels

 

When I saw 40mpg for sure one time I was going from Chicagoland to Colorado. Had some friends in an SUV following, everyone surprised lol. I used the GPS distance back to our starting point, and the gallons of gas it took at the station.

 

i just calculated from 2 tanks and how many gallons i put in. I think i averaged like 200 ish miles cant remember how many gallons i put in. Ill have to be more accurate this next tank