Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Joseph Davis]

I'm looking into building an enclosure, primarily to direct airflow and keep monkeys from kicking electrical connections, secondarily to contain noise.

Anyone have any practical experience with air flow or sound deadening?  For the former I'm visualizing a couple squirrel cages pulling from a sheet metal exhaust trap, and a spare accordion vent hose for "interesting" exhaust configurations. 

[slappynuts]

When apartment buildings are built they offset 2/4 studs on a 2/6 plate and then weave fiberglass between the studs. As far as ventilation goes,maybe restaurant exhaust fan? Obviously direct exhaust outlet as well.

[Joseph Davis]

I was also considering a cinder block enclosure with some sort of filling to dampen vibrations.  National Speed has a purpose built dyno *bay* with plenty of room to move around in that I'm (currently) modeling this notion off of.

Most of the dyno cells I've seen are more like modular food service freezers.  LOL

[TurboVFR]

The last place I worked that had a dyno room had two enormous mufflers on the outside of the back of the shop, had to build them off course, they even had stack flaps to keep out the rain. Used 6" pipe to feed them I believe and those were wrapped in that soundproof ducting. The big floppy donkey dick stuff, not the kind that recoils. ill be dipped if i can remember what kinda positive draw/fan setup they had going..

Had sweet checkerboard floor though, and a 4'x4' steel wire lattice over top of the engine coupling so you could hang multiple sets of electronics and testing on more than one EMS at a time with just the swap of a few connections.

[Joseph Davis]

Pics, or you have failed me, Bubba.

[HiProfile]

Cinder blocks filled with something, inner wall with insulation behind it or acoustic material, then fans. I'd think negative pressure would let you use big axial fans they cool barns with. The prob with squirrel cages is they usually aren't designed for suction/negative pressure. If there's a restriction on the intake, it can overheat the motor. With that in mind, you'd want baffled vents leading from the shop into the enclosure.

[Joseph Davis]

You want air coming in, there'd be no negative pressure and the exhaust would be directed at the fans intake.

[TurboVFR]

Pics, or you have failed me, Bubba.

Its Quest Engineering right in Arden, I don't know about pictures, I may be able to swing through and snap a few, just when the owner isn't there and we're good.

[catsman50]

USE PILLOW PETSSSSSSSS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Foowee]

How much power can your dyno read?  Isn't an engine's exhaust gas volume around 2.5x's intake air volume?  I think you can look up specs. on how many cfm a squirrel cage can move...  So, I'm gonna assume you could narrow down your fan selection/dimensions that way. 

Find a building, that someone is ripping a drop ceiling out of(grocery store being refurbed), n grab the tiles from the big dumpster.  Break them up n drop them inside the voids in your block wall.   

Making pulls with the doors cracked n then closing/opening getting annoying?

[Joseph Davis]

Yeah, annoying.

Dyno hooks 1800whp with some load applied across the brake.  We have the DynoCOM power record at 2441, no load and rolling into the throttle to sidestep wheelspin.

I never thought of drop ceiling as an acoustic barrier, but it makes sense.  Could layer it between drywall as well.  Sweeeet.
 

[rsmith2786]

At work we have about 20 dyno cells.  They're all just concrete block walls with thick steel doors.  The rooms are slightly pressurized to keep all exhaust flowing out the stack.  I'm amazed how quiet a high speed 300L engine is just a few feet away.  Water dynos each capable of well over 5000 hp with engines putting out close to 30,000 ftlbs.



'

[Joseph Davis]

I hate you

[Ntrain2k]

Block the walls and fill voids with shredded newspaper insulation very loose.

[TurboVFR]

Blocks are heavy and require much labor, stick frame that shit, nail up some ply and hang egg-crate foam. Been working for make-shift recording studios forEVEAARRR.