Store Page
My Summer Car
All Discussions Screenshots Artwork Broadcasts Videos News Guides Reviews

My Summer Car

Store Page
View Stats:
Global Achievements
Scottyfoxes Apr 28, 2020 @ 2:47pm
Running very lean
I recently tuned my engine to run 15.6 (Very lean) to save on fuel. I just wanted to make sure running this lean doesn’t cause damage. I’m not a car expert, but I’d imagine running too lean isn’t healthy for the engine. Am I wrong? Does running lean damage parts faster?
< >
Showing 1-7 of 7 comments
DaFusèee Apr 28, 2020 @ 3:25pm 
As far as I know the AFR ratio should not affect the wear rate of the engine. If it does it should be very minor. It's your driving style that determines the wear rate.
#1
Evan Apr 28, 2020 @ 3:41pm 
Shouldn't have a problem at 15.6.
#2
s-d Apr 28, 2020 @ 4:24pm 
It's not exactly healthy to run it on lean mixes, stick to 14.7-ish, that way it'll be more fuel efficient and you won't be running a risk of excessive damage.
#3
Scottyfoxes Apr 28, 2020 @ 4:43pm 
Originally posted by Spee-Dee:
It's not exactly healthy to run it on lean mixes, stick to 14.7-ish, that way it'll be more fuel efficient and you won't be running a risk of excessive damage.

I thought it’s more fuel efficient to run lean?
#4
s-d Apr 28, 2020 @ 6:40pm 
Originally posted by Scottyfoxes:
Originally posted by Spee-Dee:
It's not exactly healthy to run it on lean mixes, stick to 14.7-ish, that way it'll be more fuel efficient and you won't be running a risk of excessive damage.

I thought it’s more fuel efficient to run lean?
It is, but taking it too far will cause engine to wear excessively
#5
meesha Apr 29, 2020 @ 1:22am 
The only negative aspect of this I see is that lean mixture cause engine to run hotter. You might experience more overheats but haven't tested if it actually works this way. For sure when floored the afr should go down, not up.
#6
Rick Apr 29, 2020 @ 2:06am 
Like meesha said, not sure if MSC simulates this.

Apart from moving a car forward, fuel also acts as a coolant for the combustionchamber. A lean mixture will make the combustionchamber a lot hotter (i.e. piston, cylinderwall, valves) so will make the car run hotter.

To pull away from a stop or just every day driving, a lean mixture would be plenty, but in the higher rpm range you need more fuel so the mix needs to be richer. That's where fuel injection is better then a carb it can change mixture based on what the driver asks from the engine
Last edited by Rick; Apr 29, 2020 @ 2:17am
#7
< >
Showing 1-7 of 7 comments
Per page: 1530 50

My Summer Car > General Discussions > Topic Details
Date Posted: Apr 28, 2020 @ 2:47pm
Posts: 7

Discussions Rules and Guidelines