Performance Mods for 4.7?
#11
RE: Performance Mods for 4.7?
How can you tell for sure what gear ratio you have? I remember jacking up my old Mustang many years ago, marking the rear tire, and counting the number of revolutions. But I don't remember what else I did. Top gear at 70mph on my auto 03 QC 4.7L is at 2K rpm, I think I have 3:55 but am not positive.
Also, how much will 3:92 gears affect gas mileage versus the 3:55? What rpm are you guys at with 3:92 gears at 70mph?
Also, how much will 3:92 gears affect gas mileage versus the 3:55? What rpm are you guys at with 3:92 gears at 70mph?
#12
RE: Performance Mods for 4.7?
"How can you tell for sure what gear ratio you have? I remember jacking up my old Mustang many years ago, marking the rear tire, and counting the number of revolutions. But I don't remember what else I did. "
There should be a tag on the diff housing saying what gears you have or pull your VIN and call the dealership.
"Also, how much will 3:92 gears affect gas mileage versus the 3:55? What rpm are you guys at with 3:92 gears at 70mph?"
I'm at about 2200 rpm's but the truck pulls much better making it fell more responsive. Mileage if you drive like an old lady is in the 18 range. Making her growl through the tailpipe will get me 15-16.
There should be a tag on the diff housing saying what gears you have or pull your VIN and call the dealership.
"Also, how much will 3:92 gears affect gas mileage versus the 3:55? What rpm are you guys at with 3:92 gears at 70mph?"
I'm at about 2200 rpm's but the truck pulls much better making it fell more responsive. Mileage if you drive like an old lady is in the 18 range. Making her growl through the tailpipe will get me 15-16.
#13
RE: Performance Mods for 4.7?
There should be a tag on the inside of your glove box telling you everything about your model. With 3.92's just as stated above 70mph is 2200-2300 rpm. On my last long trip I averaged 18.2 mpg with the cruise on 70. You wont regret upgrading, makes a HUGE difference. Where are you located? I know a guy that is installing 3.92's with the limited slip for cheap b/c he has them laying around his shop, ask anyone that got the switch they love the new gears.
#14
RE: Performance Mods for 4.7?
ORIGINAL: ross944
Where are you located? I know a guy that is installing 3.92's with the limited slip for cheap b/c he has them laying around his shop, ask anyone that got the switch they love the new gears.
Where are you located? I know a guy that is installing 3.92's with the limited slip for cheap b/c he has them laying around his shop, ask anyone that got the switch they love the new gears.
#15
RE: Performance Mods for 4.7?
talking about the gear upgrades where can I get a set and what price range are we talking. and what would be the best set to go with if I am running stock 17's.
Also, what would be the best 2 out of these 3 to do first
1) throttle body 70mm upgrade
2) underdrive pulley
3) rear diff gears
I already have a CAI, and aftermarket flomaster 40 series. I am looking for the best upgrades to add to these.
Also, what would be the best 2 out of these 3 to do first
1) throttle body 70mm upgrade
2) underdrive pulley
3) rear diff gears
I already have a CAI, and aftermarket flomaster 40 series. I am looking for the best upgrades to add to these.
#17
RE: Performance Mods for 4.7?
I will agree that the 4.7 is no track burner but that was not it's purpose. I traded an 01 F150 SuperCrew with the 5.4 Triton and yeah, I miss the acceleration some but I didn't buy it for speed. I bought it for the looks, the drive, the ride, etc. My F150 would absolutely smoke my 05 QC 1500 4.7 up to 101mph when the governor kicked in but oddly enough, because of the difference in the torque curve between the 2 I can get my Ram sideways just about anytime but the F150 wouldn't do it without some coaxing.
#18
#20
RE: Performance Mods for 4.7?
ORIGINAL: ross944
There should be a tag on the inside of your glove box telling you everything about your model. With 3.92's just as stated above 70mph is 2200-2300 rpm. On my last long trip I averaged 18.2 mpg with the cruise on 70. You wont regret upgrading, makes a HUGE difference. Where are you located? I know a guy that is installing 3.92's with the limited slip for cheap b/c he has them laying around his shop, ask anyone that got the switch they love the new gears.
There should be a tag on the inside of your glove box telling you everything about your model. With 3.92's just as stated above 70mph is 2200-2300 rpm. On my last long trip I averaged 18.2 mpg with the cruise on 70. You wont regret upgrading, makes a HUGE difference. Where are you located? I know a guy that is installing 3.92's with the limited slip for cheap b/c he has them laying around his shop, ask anyone that got the switch they love the new gears.