As mentioned above the screw just adjusts the idle mixture. It will be almost not relevant to power, pinging, or heat. The engine might stumble at bit on a cold start. The questions you are expressing concern about relate to the main fuel circuit and this screw will have almost no effect to it.

[QUOTE=Fourthbean;64779]Thanks, any input I can get is great.

I have a 1 barrel carb with only one adjusting screw, and then the idle speed screw. Would I be able to lean it out with that setup? I could lose quite a bit of power and still be ok. What kind of problems would come up by leaning out? Hot engine and pinging?

QUOTE]

I must be seeing things... 84.1 mpg !!
 

Ok, so after jonesing for an aero mod, I went with the piece of lawn edging protruding straight down from the bumper, and slapped a flat piece of ductwork metal over the remaining grill openings (and threw some black paint over it). I just fudged it on there with panhead screws into the plastic bumper, took like 5 minutes.

Even I am sceptical, I swear though that I found myself braking where I was lurching back and forth in my seat to get a few more inches out of a coast. Maybe there is an unintended HAI thing going on too. Maybe it's placebo? I'll take it all the same :)


Trip home today:
84.1 mpg !!
29 mph avg
58 mph avg
2824 rpm max
211 degrees max water temp
85 degrees OAT

Wow. Is this with the Metro? Photo!

Just as an FYI, on my quest for a 100+ mpg fill-up, I was seeing between 105-115 mpg on a trip to a cottage where my avg speed was about 22 mph with 100% P&G.

Today I did one leg of the run using only DWL and EOC where approaching turns & stops. Average speed was 28 mph, and mpg was 85.

Metro, check. Pics, Sure:

https://www.gassavers.org/attachment....1&d=1185235713
https://www.gassavers.org/attachment....1&d=1185235730

I think it'll be real tight when I cut a coil off of each corner.

85mpg with dwl, that pains me :)

Niiiice! :thumbup::thumbup:

Please tell me you're thinking about doing some ABA on that.

After reading Houston Bill's air dam/coastdown writeup, I was theorizing that our cars' aerodynamics had less to gain from the same mod, based on the smaller than expected 2.x% FE gain (@ about 85 km/h) seen in my full belly pan trial (which was only A-B, admittedly).

Maybe my theory is bunk, and/or my understanding of the trade-offs between a smooth bottom vs. honking air dam is flawed.

As for my DWL/EOC #'s, remember: no alternator, taller F.D. & XFi cam.

:thumbup: :thumbup: :thumbup: :thumbup: :thumbup: :thumbup:. From CO ZX2, Virginia, and Hem & Haw, the cat.

Well to be fair, the lawn edging is much more pronounced on a metro, it looks like a thong on Bills ride :)

CO: is Hem & Haw one cat or two? :D

Yust one. We took him in out of the wild woods, we weren't sure if he liked us or not, hence the name.

https://aycu40.webshots.com/image/236...8595671_rs.jpg