vq35de light load crusing a/f ratio
#1
vq35de light load crusing a/f ratio
I was reading some older threads on mpg and some of you are getting 20-27mpg crusing light load.
Ever since I went FI, I'm getting horrible gas mileage at crusing approx 250 miles for 16-17 gallons. My a/f is currently around 14-14.7 crusing light load.
I was reading http://autospeed.com.au/cms/title_Tu...5/article.html and it was mentioned somewhere between 15.5-17 can be safe for light load/crusing.
What is a safe a/f ratio for our cars for cruising? I am currently using the haltech.
thanks
Ever since I went FI, I'm getting horrible gas mileage at crusing approx 250 miles for 16-17 gallons. My a/f is currently around 14-14.7 crusing light load.
I was reading http://autospeed.com.au/cms/title_Tu...5/article.html and it was mentioned somewhere between 15.5-17 can be safe for light load/crusing.
What is a safe a/f ratio for our cars for cruising? I am currently using the haltech.
thanks
#5
New Member
iTrader: (11)
i've never seen those kinda mpg's. best i ever go was maybe 22 on the stock injectors/stock ecu driving my car to chicago to get tuned. drive home on big injectors and standalone was a good bit less.
whats the stock timing map look like off an OEM ECU between 2000-4000 rpms at whatever MAF voltages aligned with 15 to 5 inches Hg??
whats the stock timing map look like off an OEM ECU between 2000-4000 rpms at whatever MAF voltages aligned with 15 to 5 inches Hg??
#7
Registered User
iTrader: (1)
Yeah, OP, my wideband says basically the same AF ratio while cruising also.
I believe we have a 20 gallon tank (my fuel meter is not correctly reading). On a 20 gallon tank (91 Cali gas) I can get about 335 miles before my fuel pump starts to make this horrible whining noise and then I know it's time to fill-up.
I believe we have a 20 gallon tank (my fuel meter is not correctly reading). On a 20 gallon tank (91 Cali gas) I can get about 335 miles before my fuel pump starts to make this horrible whining noise and then I know it's time to fill-up.
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#14
Cranky FI Owner
iTrader: (14)
I was joking earlier I wasn't that bad . I did hit limiter once and was upset because it should have been off lol. But otherwise went easy because everything was new. 711 mile trip I'll never forget it. Don't think I've ever been so happy with my setup. That was 2007.
#20
New Member
iTrader: (18)
^+1. stoich afr, maximizing vacuum via timing at cruise, and fast decel fuel cut out gives decent gains in economy. I get 21+ mpg driving within 10 mph of the speed limit on the hwy. 15 mpg daily driving (too many nice back roads to work ). I get single digits on the airstrip days.