Fuel Economy of the M42

[KenC]

I'm looking into purchasing an M42 for my bronzit beast. I'm wondering what kind of fuel economy I'd get though. My M10 gets ~29/35 now.

Ken

[boom-monkey]

I have gotten 30 mpg on the highway, but that was only once.
Normally I running around 22 city and 27 highway. With 24 being a good average when I fill up.

[KenC]

I have gotten 30 mpg on the highway, but that was only once.
Normally I running around 22 city and 27 highway. With 24 being a good average when I fill up.

Chipped?

[kowalski]

i get about 28-low 30's with cams, chip, and 19# injectors.

[bimmerphile]

Tara regularly gets 26 in the city, 30-32 on the freeway ~80mph.

I post that just because I know she probably won't. Jim C chip w/ 150k on the engine.

[george graves]

You guys suck - I'm getting 14 MPG....(Of course I have almost twice the displacement - so I guess that about right)

[boom-monkey]

Wow, what the hell am I doing wrong?

And no my car is not chipped, but it does feel like it runs damn strong.

[Stu]

Ken, with JC chip, mine would average 32-33 on the highway going to Michigan in the summer. That's using 93 octane (92 in some places). I never really monitored the around-town mileage.

BTW, recently got 28mpg on the way to the track, with a friend and over 150 pounds of other stuff in the car. (thats with the 24v, not the M42)

[Gr00v3]

pshh, i get about 21-22 with hardly any fwy/hwy driving. all city shifting at 2500-3000 babying the shit. with my eta i'd barely get 21, but that was shifting at 4200. seems like my cars love to run rich on me i suppose, i avg 25 in my dad's honda del sol, but he can get like close to 40. couldn't tell you what i'm doing differently
________
Buy e cigs

[nickmp0wer]

i get an average of over 30mpg for every gallon in the tank

[KenC]

Hmm... the M42 swap is starting to sound even better

[nickmp0wer]

do it. and put in a lightweight flywheel while the shit is out

[spud814]

i get about 25avg.

[Stu]

Rob has an entire driveline for ya Ken 8)

[KenC]

Rob has an entire driveline for ya Ken 8)

I'm getting an entire drivetrain local w/new exhaust for $750... it also comes with the wiring adapter for the early 318. 8)