Where are you guys cruising at??? (AFR)
#1
Where are you guys cruising at??? (AFR)
Okay, i am all about best economy too, not in boost but while cruizing. I was reading on PGMFI that some dude tuned his car getting 40+ miles per gallon and running mid 15 afrs crusing with part throttle. Right now i am in the 13.5 range cruizing part throttle, level road, 70 miles and hour, 3800-4000 rpms, 16-19 hgs, with base timeing that b16s have, 450 dsms. I ran one tank never hitting boost once, driving grandma style and i am getting around 27mpgs. How lean is good, can i take it to 14.7 or even a little higher as long as i listen for det What do you guys suggest. Also what is ideally the best afr under a load in vaccuum, espescially right before getting into boost??
its a 2000 civic si.
its a 2000 civic si.
#2
Re: Where are you guys cruising at??? (AFR)
14.7 is what the stock o2 sensor *tries* to get the afr at, so why wouldn't it be ok?
I've run low 15's with no problems. This was on an 8.8:1 compression ratio engine tho.
I tuned an h22 that would start to hear detonation at anything above 15 with 93 octane.
I've run low 15's with no problems. This was on an 8.8:1 compression ratio engine tho.
I tuned an h22 that would start to hear detonation at anything above 15 with 93 octane.
#3
Re: Where are you guys cruising at??? (AFR)
Originally Posted by d112crzy
14.7 is what the stock o2 sensor *tries* to get the afr at, so why wouldn't it be ok?
I've run low 15's with no problems. This was on an 8.8:1 compression ratio engine tho.
I tuned an h22 that would start to hear detonation at anything above 15 with 93 octane.
I've run low 15's with no problems. This was on an 8.8:1 compression ratio engine tho.
I tuned an h22 that would start to hear detonation at anything above 15 with 93 octane.
#8
Re: Where are you guys cruising at??? (AFR)
yea, i ran my d15b super lean cruising. i had a super small turbo that boosted in every gear no matter what. i dont remember what the afr's were but i was getting 35mpg's with a 50/50 mix of city and highway driving. one i start driving again in march i will be shotting for 40mpg's highway. if there is no load on it, then it will be hard to hurt it