Yeah, pumps and generators seem to use them often, and I expect WOT 24/7.
HDEO for 1971 Dodge 413-1 RV
- Thread starter Ray S
- Start date
I had a ‘73 Class A for quite a while, Dodge 440-3 with a Carter Thermoquad-it ALWAYS got Castrol GTX 20W50. And, that heavy old girl WORKED-once had 12 guys in it on a trip to Churchill Downs in Louisville. 3 MPG and a 30 gallon tank meant a LOT of gas stops-I actually had TWO fuel pumps because the single mechanical would starve the engine going uphill!
I have an aux electric to push from the tank, although I hadn't seen an issue WOT at 6% myself with just the mech pump.
With the 8HP70 trans and other tune stuff I hope to get >10 at 65, and the 60 gal tank is plenty.
The boxy style class As really take power to push 70.
Mine would make 70-that old Torqueflite 727 laying the power down, revs in the 4000 range at 70!
I have an aux electric to push from the tank, although I hadn't seen an issue WOT at 6% myself with just the mech pump.
With the 8HP70 trans and other tune stuff I hope to get >10 at 65, and the 60 gal tank is plenty.
The boxy style class As really take power to push 70.
Yeah that's part of my issue, with 4.55 gears, an old slipping TC, and now slightly undersized tires it's "screaming" all day on the highway, while peak torque is at 2200 and HP at 3800.
The new ZF trans will bring rpms down, with less wear and noise from a 413 screaming under my elbow.
ok what if you opened up the Exhaust and put a good Dustrubitor in it ? along with your trans upgrade that would be helpfull to your millage ?
The exhaust could use small tube headers - the iron manifolds on these are basically large plenums. The dizzy is a 60kV electronic unit which really made a difference in power.
Pretty normal on the old heavily loaded V8 engines. The 366 GM engines in large trucks were notorious for it too. I’ve seen them glow in the 534 gas engine in our wrecker on a long hard pull too. Not saying he doesn’t have a possible problem but I wouldn’t go looking for something wrong if it runs fine otherwise.
I added O2 sensors and had the Holley reman'd to spec so I'm confident that the performance is OEM (slightly rich). The data shows rich at WOT, slightly rich at 1/2 and very lean with plates closed downhill and 22"Hg. Rick Walker carbs does a perfect job.
Come to think of it our early eighties ambulances with 454 engines would illuminate the ground when on high idle on scene. They also cracked exhaust manifolds frequently. We wrapped air conditioning lines with exhaust wrap and mounted a cooling fan at the 160 amp Motorola alternator trying to keep everything from cooking under the hood. Even punched louvers in the hoods. My memory is foggy after 45 years of this stuff…
My 454 Southwind cracked manifolds and I added Headmans to good effect.
Problem with RVs is that they glow on the hill and then cool too quickly on the downhill.
That RV is great!
Help me understand your chart and how it relates to ratios like 14.7.
I tuned a holley with a wide band, it was fun to watch the different circuits kick in. Nice tool for tuning.
With narrowband it's an S-curve, 1.0 rich and .4 to .6 is about stoic.
Most ECUs don't care about keeping perfect 14.7 (and rarely do for good reasons). Here in 10% ethanol land stoic is more like 13.x anyway so I want it richer for that and which puts it out of the top of the vertical middle plot. Then also, I live at altitude which implies I want leaner.
https://www.holley.com/blog/post/how_to_tune_your_holley_carburetor_for_driving_at_high_altitude/
And, to top it off, the 413 RV models are stagger-jetted
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Thank you for the details.
I didn't know they had 5w20 back in 1971 
Yep, Mobil one was the first I used back in the day in railway switch heaters used to melt snow.I didn't know they had 5w20 back in 1971
I have never in my life seen a BB Mopar eat a cam. I would not worry about adding anything to the oil.