Nice and quiet when in the box.
I also noticed that it had a 12v dc output. I had a brainstorm (possibly a fart) and hooked up two computer case fans to the 12v and drilled a couple holes in the bottom to vent the case, one fan in and one fan out.
I figured any noise out would be attenuated by the dirt. It seems to be.

 

Computer fans might not move enough air for that to do much. Some of those duct fans are pretty powerful. Noctua is one of the best, if not the best in computer case fans. Low cost, longevity and quiet. You may be better off with just one good exhaust fan to keep the air moving.

 

If the ones in it don't work out I'll look into those.
I actually built the box and when I was done I realized I made it nearly airtight when closed. Not wanting to have the roof propped up when running as I felt this would negate the entire purpose of having the box, I just threw them in as I had them.

 

If your method doesn't pan out, - using a smaller exhaust fan, enclosing it some will have it pulling more air... why I was thinking duct fan. The intake inlet should at least twice the size at the exhaust....for fanned exhaust anyway.

Yea, doesn't require a roof stack w/rain cap or turbine stacks. Turbine stacks are more for whole house fan set ups. I mean you could if wanted to lol.
Intake are usually thru the wall 4-6" above the floor. Exhaust thru the wall 2-6" below the highest part of the ceiling. Duct fans slip fit into the wall with adjustable width flanges on both sides for securing. Very simple to install. Sizes 4-8". Minimal power consumption with 5x's the CFM. Those little suckers move some air due to the duct enclosure in which the fan is centered into. The more expensive units are temperature controlled with sensitivity adjustment, - automatic. Those are intended for additions or extending a heat zone/duct work.

I bet a little 6" wold be perfect. A 4" would work....as long as it's the ducted version and you can spare about 18 bucks or so.

Good luck coming up with something..

 

That was me. I'm curious to see some pics of it if you have them.

 

White
Do you know if a 1990 ranger with 2.9 v6 have 2 fuel pumps? A low pressure pump in tank and a high pressure on frame?

 

I do not believe so. I think that was a Bronco II only thing.

 

Thanks for the idea.
I didn't take pics while building. Even with having a camera in my pocket all the time I never seem to think of taking pics.
I'll probably go back up in April and hopefully remember to get pics.

 

Trivia; German allied.signal trucks used a modified BMW motorcycle engine. It was on a microtrailer with no housing. I was walking through the dead quiet forest at night on a courtest ceypto maint call and was 6" from the black "mosquito netting" that hung 2-3 feet from it. Totally exposed, and yet, scary quiet. The auto-fan was barely discernable, 30" from my face at head level. They cuda warned a guy.

Mebe drill an 1/8th" hole in your gen box and stick a cheap.1" dial meat thermometer to note temps in the box. Mebe add an intake fan if you exceed 100°F. When you kill it, one time, check the gas tank temp?

Also did elec-mech R&D for gov't stuff. Fans were always in the mix. One of them failed as it was trying to pull hot exhaust rather than pushing intake. in one case, we stacked 2. Backpressure / case resiatance was high with a few hundred watts of waste heat. Axial fans push about 0.1" of water column. ~27" = 1psi. A few are thicker and can make 0.3". Squirrel cages rule where case pressure / flow fesistance is an issue. You start to almost need an entrance tube 3 ft long and lined w batting to kill fan noise in those heavenly quiet spots.

Play w the fans with the gen off. Put a T on the entrance tunnel or a flat "cap" that is batted standi.g off the entrance area 9x the area. IOW, with a 6"x6 fan your tunnel might be 1'x1. Stand an absorbant cap 0.5-1 ft from it and 4-9 sq ft, respectively. If it's flat, bonus points if it reflects any escaping sound 45° straight up. Again, a batted T can be adequate. Or bend 1/4" hardware cloth so it springs outward, holding batting againgst the inside of 12" round ducting. "There must be 50 ways to leave your (dB) level." Or diffuse the entrance - opposite of a silencer/muffler.

 

Noobie... what's the story on the Torino in your avy? Looks sick!