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Originally Posted by slowmover
Need to take it over to Hendersons Lineup. Mechanical rolling resistance issues plus steering/handling upgrades are their forte. National reputation. It's the biggest impediment to repeatable FE results at any step of the way.
A set of Doug Thorley Tri-Y headers and non-restrictive single 3.0" mandrel bent exhaust with resonator and chambered muffler. Engine fuel delivery needs to be refined with an O2 sensor on chassis dyno. Stepping up to even simplest TBI would be a benefit (but work with source as RVs have different fuel demand than cars. ) MSD distributor as its far easier to adjust total and initial timing.
See threads by Orbywan. A boat tail would be singular plus effective.
I didn't follow reasoning, but that Streamline TT a better low cost and long term bet than this rattletrap. Wood framing?
An early 70's CAYO Motorvator (Avion) or Silver Streak Class C is a better choice. In which case leave aero alone except air dam, etc. Focus on RR mech issues and upgrade drivetrain. These are far better built. Past plumbing breaks, water damage unlikely.
These and yours are on either the CB300 or MB300 chassis, if memory serves.
Wall interior water damage is likely on almost all conventional RVs of gen years or more. Pick up a moisture meter with probe and start investigating floor. A long thread on WOODALLS re Dodge motorhomes has been running for years.
What is your projected percentage improvement goal?
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Hey Slowmover, honored to have your input again.
We sold the Streamline because we were getting tired of maintaining a trailer and a tow rig, and when we switched from a Tahoe to a Roadmaster as a tow rig the towing wasn't so much fun anymore. We were done with the Roadmaster then got an offer for the Streamline we couldn't pass up and so we let it go.
Let's see, it already has a set of Thorley headers, but duals instead of a single 3". The exhaust is practically new so I'm leaving it alone for now.
A thorough suspension refresh is on the list. A few bushings are new, most have 75k miles on them. It needs shocks, the typical steering box adjustment, will probably just redo the entire front end then get it aligned. I also found a sway bar for it to eliminate some of the sway I felt on the first few drives.
The Clipper is all fiberglass over a wood frame. They don't leak nearly as bad as most 70's aluminum/wood models. I looked at a few, all were total rebuilds. We also wanted something small like this one and loved the looks and fan base the Clippers have so we went for it.
As for % goal I would love to hit 20% once we do the 4-speed transmission. So that would put it right at 9 MPG. Since we'll probably only use it a couple thousand miles a year it doesn't make sense to throw $10k at it, but we'll see how much use it gets and adjust.