Originally posted by lt1s10
storm the best way to save gas with a blower is not kick the blower in so much. the blower is not doing anything untill around 1/2 throttle anyway, so riding down the road at light throttle there is not enough air to make any boost, so its not doing anything. ive had 454s with 671 blowers that got the same gas mileage with or without the blower.depending on the way i drove it) i leaned the carbs. on down got good gas mileage but could not hold the boost on for any amount of time. if you wont gas milage the blower is going to be for looks only. i think that gear might be hurting you a little also. i ran a little lower gear so it didnt take as much throttle to move the car. go over to the gallery and look at the 70 chev. conv. i was getting around 15 freeway mpg with that. i dont see what the boost has got to do with the idle eather. if your sitting at the stop light idling you could take the rotors out of the blower and it wouldnt make any dif. hope this helps
Sorry it seems your post snuck in while I was typing the other one. I lowered the boost because I thought that I could move the curve to the left so there would be almost no boost at the lower rpms that I was using to cruise on the freeway. The carb seems to be happier at the lower

Just how lean did you run the carbs, I am a horrible by ear tuner so I tend to use the wideband for most of what I dod.

Also on the gearing any suggestions. I have a 3.13 and a 3.33 and a 3.69 or so in the garage right now. Thing is I don't want to run my freeway cruising rpms to high.