Speedo Question
#1
Speedo Question
I was wondering if anybody has information on engine RPM vs MPH?
I've a 2001 Dodge Ram Quad cab 4x4, with the 5.9 gas engine. At 60 MPH (with the cruise on & on a flat level road) the engine turns about 1600 RPM. I think the engine speed is about right, but I'm not sure. I just bought it yesterday & the tires are 28575R16's. I'm not sure if the computer has been corrected for these tires.
I was also wondering if anybody has one of the HyperTech PowerTuners for the 2001 Dodge. I really don't want to purchase one if I don't have to, but I would be willing to rent one & pay shipping both ways.
Mark
I've a 2001 Dodge Ram Quad cab 4x4, with the 5.9 gas engine. At 60 MPH (with the cruise on & on a flat level road) the engine turns about 1600 RPM. I think the engine speed is about right, but I'm not sure. I just bought it yesterday & the tires are 28575R16's. I'm not sure if the computer has been corrected for these tires.
I was also wondering if anybody has one of the HyperTech PowerTuners for the 2001 Dodge. I really don't want to purchase one if I don't have to, but I would be willing to rent one & pay shipping both ways.
Mark
#3
#4
RE: Speedo Question
I guess I better explain. I took delivery & was going home & got pulled over by the hiway patrol. Anyway, he said "your tires seem a bit bigger than factory, you might want to make sure your speedo is correct". No ticket or anything, just a heads up by him.
Hence the question.
Mark
Hence the question.
Mark
#5
RE: Speedo Question
ok heres a site that has a calulator for ya too use to find out if it is correct
its bbackwards but u gotta go find a straight road put the rpms say a 2000 and see how fast ur going then fill in the info and basically if u do have 3.55 rear end gear ratio and the tires are correct it shud say 3.55 if it doesnt ur tires are prolly to big
it also says in the door area not on the door itself but the truck waht size tires ur truck came with from the factory then see waht you have on it
but heres the link anyways its under calulators
www.mymopar.com/tools.htm
thanks todd for that link
its bbackwards but u gotta go find a straight road put the rpms say a 2000 and see how fast ur going then fill in the info and basically if u do have 3.55 rear end gear ratio and the tires are correct it shud say 3.55 if it doesnt ur tires are prolly to big
it also says in the door area not on the door itself but the truck waht size tires ur truck came with from the factory then see waht you have on it
but heres the link anyways its under calulators
www.mymopar.com/tools.htm
thanks todd for that link
#7
RE: Speedo Question
http://dodgeram.org/tech/specs/axle/rpm_vs_mph.htm
heres a place i visit frequently.lotta good info there.i have 285s as well...it says at 65 im goin like 74..or something like that.check it out.
heres a place i visit frequently.lotta good info there.i have 285s as well...it says at 65 im goin like 74..or something like that.check it out.
Trending Topics
#8
RE: Speedo Question
Thanks guys. I tested my speed by following a couple of cars at a steady rate for several miles. I also checked the odometer agains the miles posted along side the road. Seems I'm ok. I might be 1 or 2 mph off, but I think I'm within the LEO allowance for speed.
Now, does anybody have a Hypertech Power programmer they want to rent?
Mark
Now, does anybody have a Hypertech Power programmer they want to rent?
Mark
#9
RE: Speedo Question
ORIGINAL: MarkBall
Now, does anybody have a Hypertech Power programmer they want to rent?
Now, does anybody have a Hypertech Power programmer they want to rent?