On my current setup it seems that my gears are always on top of the turbos. When running down the highway there's not enough RPM to keep them working. Considering moving down to 4. 10's and wonder your opinions. I know this has been covered in depth, this was reflected in search results, but my situation may be a bit different.
Currently I'm running 3. 73 gears & 325/60-20's, (35. 4"). vs a standard 265/70-17, (31. 7") Using THIS calculator, I found in a search, this is what I cam up with.
Goal is optimum driving at 70mph. Figures based on . 7 OD in the 48re.
35's:
3. 73's @ 70mph = 1735rpm
4. 10's @ 70mph = 1907rpm
4. 30's @ 70mph = 2000rpm
31's:
3. 73's @ 70mph = 1937rpm
4. 10's @ 70mph = 2129rpm
Before spending the $$$$ to do a swap does this seem like a proper fix, vs. changing out chargers?
Driving impressions: The turbos spool incredibly well under hard acceleration. Though this vehicle is my DD and I like to just go with the flow of traffic. Stop light to light it smokes on me pretty good if I dont take off like a g-maw. On the highway it does ok until I start up a grade. It will lug a bit, smoke, and slowly the turbos will begin to light and smoke clears, partially because of how tight my t-converter is. I know that 4. 10's have a mpg dis-advantage, but running the larger tire it seems as I will be going back to where the typical rpm's are in a stock setup.
Any thoughts?
Currently I'm running 3. 73 gears & 325/60-20's, (35. 4"). vs a standard 265/70-17, (31. 7") Using THIS calculator, I found in a search, this is what I cam up with.
Goal is optimum driving at 70mph. Figures based on . 7 OD in the 48re.
35's:
3. 73's @ 70mph = 1735rpm
4. 10's @ 70mph = 1907rpm
4. 30's @ 70mph = 2000rpm
31's:
3. 73's @ 70mph = 1937rpm
4. 10's @ 70mph = 2129rpm
Before spending the $$$$ to do a swap does this seem like a proper fix, vs. changing out chargers?
Driving impressions: The turbos spool incredibly well under hard acceleration. Though this vehicle is my DD and I like to just go with the flow of traffic. Stop light to light it smokes on me pretty good if I dont take off like a g-maw. On the highway it does ok until I start up a grade. It will lug a bit, smoke, and slowly the turbos will begin to light and smoke clears, partially because of how tight my t-converter is. I know that 4. 10's have a mpg dis-advantage, but running the larger tire it seems as I will be going back to where the typical rpm's are in a stock setup.
Any thoughts?