Greetings fellow Ram owners, just laid to rest my 2002 Dodge Ram Quad with the 5.9L, 4x4 on 35s (gonna miss her) and I purchased a 2007 Dodge Ram Mega Cab with the HEMI (only 29K miles). So I have a couple of questions on this truck.

I read that we don't have the MDS, but what RPMs should I be seeing at freeway speeds, mostly around 70mph. I am at almost 2k on the RPM and I was usually at about 1600 RPM on the 5.9L. So just wondering what RPMs are you guys getting with the HEMI at FWY speeds.

This is a stock truck, 2wd with CAI.

thanks

 

At 70 mph I am at 1800 rpm, but I also have 35" tires. It also depends on what gears you have. I have 3.73"s which is most likely what you have.

 

Close to 2000 on mine. 4.10 gears, 285/70/17 tires. I think that is sort of the normal range. May also depend on whether there is slight grade or not (torque convertor engaged or not).

 

Your probably looking for numbers on similar trucks, but with 4.56's and 38" tires I don't see 70mph too often as i think i get negative gas mileage up there. jk.

IIRC I'm around 2400-2500.

 

MDS doesnt lower rpms just so you know. RPMs stay the same in equip Rams.

I have altered my transmission so I get higher rpms at all speeds. It increases performance by keeping the truck within its powerband and it actually improves mpg's! Ofcourse by 70mph, my truck is in 5th and I am at 1850rpm with my stock 3:73 gears. Use of a Superchips tuner with Advanced trans tuning to alter shifts.
The Hemi has 100HP more and still gets better mgps than the 5.9L so your already ahead!

 

Thanks. Different truck, different motor so wasn't sure where the RPMs are yet...

I have the 3.73 gears...

PS... Drives like a champ and so much more power compared to my old one.

 

Looks like you have 245/70r17 tires on the truck. That would give you 681 revs/mile.
681*3.73*.67*(70/60)=1985 RPM. A 35" tire would be around 576 revs/mile. If you had those 35" with a 3.55 axle. 576*3.55*.67*(70/60) =1598 RPM.
You old truck was really gear pretty high. Most people would want at least the 3.92 or higher for 35" tires.

 

HOLY STINKBUG, you need a leveling kit Srg. Haha

 

2200rpm's at approx 63mph to 68mph...