Rear Axles Ratios
12-10-2017, 06:14 PM
#21
Senior Member
Sounds good. I was leaning towards the 3.55’s. So I guess you are saying that it will get the turbos to kick in quicker. I’m still debating whether to get the 2.7 or 3.5 EB. I’m not planning on towing and from what I see they both get about the same gas mileage. With the 3.5 you are getting 50 more HP, but you paying extra money for that engine. I haven’t heard any complaints about the 2.7. Is there a definite difference in acceleration with the 3.5 over the 2.7? Any other advantage with the 3.5 other than towing?
12-10-2017, 06:19 PM
#22
Senior Member
don't listen to anyone who mentions lag with regards to the 2.7 or 3.5 ecoboosts. There is no lag. none. So don't worry about lag with regards to gearing, no matter what gears you have.
btw, you're getting 50 more hp and 70ft-lbs more torque, but you're also getting more displacement, which for towing, means it doesn't have to work as hard towing the same load as the 2.7.
btw, you're getting 50 more hp and 70ft-lbs more torque, but you're also getting more displacement, which for towing, means it doesn't have to work as hard towing the same load as the 2.7.
12-11-2017, 07:59 AM
#23
Senile member
All turbos have lag. Its a fact. You may not be able to feel it but boost does not happen until you make enough exhaust gas to spin the turbo to a speed to make boost. This is a fact. You may not feel it but there are times when a turbo motor can be caught off boost and will produce lag.
The ecoboost motors in stock form are imperceptible. There's more throttle/transmission lag than turbo lag.
12-11-2017, 08:06 AM
#24
Senior Member
[QUOTE=chimmike;5576696]I know all about lag and boost. I built a 500whp turbocharged 2.3L 4banger. That was lag...full boost just after 4000rpm. That's when you have to plan your shifts.
The ecoboost motors in stock form are imperceptible. There's more throttle/transmission lag than turbo lag.[/QUOTEi
i agree Ford has done a great job with lag in the eb motors. We had a 14 2.0 eb escape and it was almost inpreceivable but it was there. My wife has a new crv with a 1.5 turbo motor and its there too. Bearly felt but still there
The ecoboost motors in stock form are imperceptible. There's more throttle/transmission lag than turbo lag.[/QUOTEi
i agree Ford has done a great job with lag in the eb motors. We had a 14 2.0 eb escape and it was almost inpreceivable but it was there. My wife has a new crv with a 1.5 turbo motor and its there too. Bearly felt but still there
Last edited by 2015rubyFX4; 12-11-2017 at 11:41 AM.
12-11-2017, 09:06 AM
#25
Senior Member
Just got my new issue of MotorTrend, and they tested all of the '18 Ford trucks. The 5.0 Coyote was the overall fastest truck in the test, and in the 1/4 mile race it tied with the Raptor which has the 510 lb/ft version of the 3.5L EgoBoost engine.
My point is, do not underestimate the 5.0. It's the king. And it's rock solid dependable.
As far as axle ratio, the beauty of the 10-speed auto is that the overdrive gears are so tall you can get excellent highway MPGs with any axle ratio. So, if you go 3.73 you get more power at slower speeds, better towing, and still maintain great cruising MPGs.
My point is, do not underestimate the 5.0. It's the king. And it's rock solid dependable.
As far as axle ratio, the beauty of the 10-speed auto is that the overdrive gears are so tall you can get excellent highway MPGs with any axle ratio. So, if you go 3.73 you get more power at slower speeds, better towing, and still maintain great cruising MPGs.
12-11-2017, 11:41 AM
#26
Senior Member
Just got my new issue of MotorTrend, and they tested all of the '18 Ford trucks. The 5.0 Coyote was the overall fastest truck in the test, and in the 1/4 mile race it tied with the Raptor which has the 510 lb/ft version of the 3.5L EgoBoost engine.
My point is, do not underestimate the 5.0. It's the king. And it's rock solid dependable.
As far as axle ratio, the beauty of the 10-speed auto is that the overdrive gears are so tall you can get excellent highway MPGs with any axle ratio. So, if you go 3.73 you get more power at slower speeds, better towing, and still maintain great cruising MPGs.
My point is, do not underestimate the 5.0. It's the king. And it's rock solid dependable.
As far as axle ratio, the beauty of the 10-speed auto is that the overdrive gears are so tall you can get excellent highway MPGs with any axle ratio. So, if you go 3.73 you get more power at slower speeds, better towing, and still maintain great cruising MPGs.
Last edited by 2015rubyFX4; 12-11-2017 at 11:53 AM.
12-11-2017, 12:23 PM
#28
Renaissance Honky
Jump on YouTube, check out 'The Fast Lane Truck' and their video reviews. They really did seem to like the more rock-n-roll feel of the 2.7 over the ecoboost. with the changes for this year, expect new vids to come out over the winter.
12-11-2017, 02:56 PM
#29
Senior Member