Quote:
|
Originally Posted by priobe
I was wondering what you guys are getting for fuel economy with a big block 427 and webers.
Just curious  |
Not quite 427 & Cobra but 428 & Shelby:
Relaxed highway driving (70-90 mph)
Holley 750 (3310) 16-17 mpg
Holley 850 DP 14-15 mpg
48 IDAs (tuned by an "expert"
) 8-9 mpg
48 IDAs 13-14 mpg (my current - not yet perfect tune)
The leaner tune runs much , much better than the "expert" and also noticeable better than the Holleys.
I expect the Webers to do as well or better than the 3310, after I find a way to reconnect the vacum advance.
At $2 per Liter (3.78l / gal)
I do care.