StickyLifter
Senior Member
So I don't know how you guy's trucks run, but my RCSB 2wd 5.7/65RFE/3.92/31" tire Tradesman runs in MDS a lot since I went to the 3.92:1 final. I like MDS because it saves gas and is non intrusive. It's a pretty slick setup and I think it's cool.
Assume that Chrysler's durability testing works abd that the "hemi tick" is really a "warped cast iron truck manifold tick" for most occurrences and has nothing to do with the valvetrain.
When I swap out the turdly 65RFE for an 8HP70, I'm expecting to be able to spend even more time in MDS mode, which you would think Chrysler would like for their CAFE and emissions compliance. So here is what I'm wondering:
If the factory had offered a 6.4L/485hp MDS version, wouldn't it have helped their CAFE? I don't see how it would fail emissions, and I'm pretty sure that the added power from the displacement increase would help the truck stay in MDS mode EVEN EVEN MORE. I could them offering it as an option on the R/T models that already have the 8spd and 3.92 final. I don't see how it would burn more gas at light load, and with 40 extra cubes it's bound to pull hills in MDS and stay in more often. How can a 3.2L running on four NOT get better mileage and emissions than a 5.7 running on all eight under those conditions?
Assume that Chrysler's durability testing works abd that the "hemi tick" is really a "warped cast iron truck manifold tick" for most occurrences and has nothing to do with the valvetrain.
When I swap out the turdly 65RFE for an 8HP70, I'm expecting to be able to spend even more time in MDS mode, which you would think Chrysler would like for their CAFE and emissions compliance. So here is what I'm wondering:
If the factory had offered a 6.4L/485hp MDS version, wouldn't it have helped their CAFE? I don't see how it would fail emissions, and I'm pretty sure that the added power from the displacement increase would help the truck stay in MDS mode EVEN EVEN MORE. I could them offering it as an option on the R/T models that already have the 8spd and 3.92 final. I don't see how it would burn more gas at light load, and with 40 extra cubes it's bound to pull hills in MDS and stay in more often. How can a 3.2L running on four NOT get better mileage and emissions than a 5.7 running on all eight under those conditions?