MPG increase
Senior User
Joined: Mar 2010
Posts: 231
Likes: 0
From: Lakeland
Wow, right now I'm only getting about 13-14mpg with my '93 EFI 300 in the Bronco. I just did a tuneup/timing bump on it and I'm hoping to see some changes. Either way at 14mpg, it's still my econobox compared to my DD. I know I have some emissions issues also but I'm working my way through them to try and figure out the ultimate cause. Hopefully I'll have a clean burning, 18+mpg Bronco in the coming months.
Posting Guru
Joined: Nov 2008
Posts: 1,647
Likes: 3
From: Halifx Pa
I was doing battle with my Cater 1 bbl on my 77 300, and was getting between 10 to 14 mpg. I would fine tune it, and it would run good, but in no time it just wasn't running right, and there was an ever increasing rich problem. I would adjust the fuel/air screw, but it made no difference. I took the carb off, and found this screw was broken off in the carb.
I got a friend who is in the surplus business, and he had a Cater 1 bbl brand new in the box, however, I learned it was for an 81 to 86 F150, 84 Topez, or 86 Mustang. I put it on and it ran like a NEW truck, but with in 15 to 20 minutes it started to run like the other carb, or worse. I got a rebuild kit, and that took care of it, and I took it to my buddies shop and he put it in the scope and we fine tuned it, and I am now getting 19.5 mpg.
One of the other up grades is it now has an electric choke, which makes it nice too. I figured in four tanks of gas, I will save in gas to pay for the carb, which was $75 by the way. I thought that was a decent price for a carb that had never been on an engine before, and when the carb was rebult, the biggest issue with it was the float was WAY out of adjustment.
I got a friend who is in the surplus business, and he had a Cater 1 bbl brand new in the box, however, I learned it was for an 81 to 86 F150, 84 Topez, or 86 Mustang. I put it on and it ran like a NEW truck, but with in 15 to 20 minutes it started to run like the other carb, or worse. I got a rebuild kit, and that took care of it, and I took it to my buddies shop and he put it in the scope and we fine tuned it, and I am now getting 19.5 mpg.
One of the other up grades is it now has an electric choke, which makes it nice too. I figured in four tanks of gas, I will save in gas to pay for the carb, which was $75 by the way. I thought that was a decent price for a carb that had never been on an engine before, and when the carb was rebult, the biggest issue with it was the float was WAY out of adjustment.
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
That right there can cause quite a bit of grief. The idle usually sucks when the float level is not right and no amount of external adjustment can correct that.
Posting Guru
Joined: Nov 2008
Posts: 1,647
Likes: 3
From: Halifx Pa
Your right, I felt as if it was going to shut off at any time, it was very hard to drive in that condition. It now comes off of the line and right up to 55, or 65 mph with the rest of them now with ease.
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Lead Driver
Joined: Mar 2008
Posts: 7,188
Likes: 384
From: Near Los Angeles
ZF with Gear Vendor...
I am intriqued by the gear-splitting ability of the Gear Vendor unit with a ZF. Looking at the chart on the GV site, I could see how it would be very useful for climbing with a load, also for keeping the rpm in the torque band for better mileage.
Would it be over-kill? Maybe.
Would it be over-kill? Maybe.
FTE Legend
Joined: May 2008
Posts: 56,542
Likes: 0
From: In my own world
would be very pricey to do, and an awful lot of fab work to get it all together, to make something that only you would understand, and appriciate. let alone, I really think the driveabulity would really be horrable.try driveing a zf equiped truck with 4.88's in it, the shifting happens so quick, your in 5th, before you are hardly out of the intersection, now split it, and that's a whole lot of shifting. the trucks manners would be horrable.pulling a heavy trailer would be bad, you would be shifting constantly.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,189
Likes: 2,656
From: GA
I don't know how traffic is where you live. I do know if you have alot of stop and go and backed up freeways standard shift can be a PITA.
I once drove my 4 speed 81 through ungodly Atlanta traffic to help move my daughter back home. If I lived there I would not have a standard shift !
I once drove my 4 speed 81 through ungodly Atlanta traffic to help move my daughter back home. If I lived there I would not have a standard shift !
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