Join Date: Jun 2007
Location: Palm Bay FL
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Edge MFG Response
I talked to Edge today - makers of EVO2 programmer. I told them my interests were two conditions:
1)Economy while towing my 19' boat (3200#) with my slide-in camper (3400#) installed
2)Economy while unloaded in the city & highway.
I told them that I was upgrading to a Tymar/Donaldson intake system, a 4" turbo-back exhaust and their EEF1120 programmer.
I asked- if these are the primary driving situations, should I use a 3.5" or 4" downpipe?
Edge responded that for the towing & economy mode (my situations) the
3.5" downpipe might give better overall performance as opposed to a 4" downpipe with respect to turbo spin up time and acceleration at low speeds.
Note that my primary focus is on fuel economy and towing for my load conditions. If I wanted top performance in acceleration and speed, then I would choose the 4" downpipe.
I also talked to the people at Magnaflow. They had a general comment of using a 3.5" with the stock settings and a 4" with a chip (performance). They had no opinion they were willing to share about economy settings with a programmer.
I'm not trying to cut myself short, just trying to match what's available to my driving needs.
Thanks for all the responses.
2000 F350 7.3L Crew Cab
Dually 2WD 4.10LS rear
1999 Lance 1130 Slide-in Camper
screened Zoodad, otherwise Stock-but upgrading