blower dyno

Hi
Has anybody here seen a dyno for blowers? Do you know where we can see some pics how they look.

Thomas

 

If you find good info, post a link please. The dyno we built was powered by a 283 Chev. Pretty crude.

 

I know that John Force has one..if you need a phone number let me know..Dave
www.myspace.com/daveloweswr

 

Rob Atchison has just built one and it is powered by an AJ481x .

 

I have seen both Kalitta’s and Schumacher’s blower dynos and they are powered by large electric motors. I was lucky enough to see Schumachers in use, and it’s incredible. There’re set up to turn the blower at a typical fuel motor idle. Then through the use of a gear box/clutch set-up, in an instant they bring the blower up to a predetermined rpm to match how quickly the blower would spool up during the starting line launch. They then cycle the blower rpm to match a typical top fuel pass. It’s all over in less then 5 seconds. The data they gather tells them if the blower efficiency is where it needs to be for their tune-up and overdrive.

 

WOW!! Does that ever paint a mental image! It would be quite something for electrical wigdets, the large HP e-motor and the VFD or whatever they use to control it.
And for me it doesn't stop with "just" that. In order to replicate fuel lubrication, cooling and occupancy I would assume a fuel system is intact also.


SSI has one.
Mike Sage (SCS) had one in the mid-80's? it was powered by a Pontiac Big Chief motor, 1100HP. The blower dyno and wife were gone about the same time.
Does Davenport or DMPE have any? About 3-4 yrs ago Darren mentioned wanting one.

 

If you got 'em you might as well use 'em.

 

Electric motors really aren't that big, there turning huge flywheel which is what turns the blower. So the electric motor is only turning the flywheel. The SC's take a huge amount of power, and an electric motor that is needed to turn that can run about half of New York

In reality, you need both, steady state and the inertia test. An electric motor is great for steady state, which is the best way to test flow, power consumption, temps. But the inertia is the only way to simulate the acceleration and boost curve.

Thanks,
Dustin

 

Darren Mayer's will be done in about 2 more weeks.

 

I know the guy that works on the one that SNAKE has in his shop here in Brownsburg. I've seen it, not running however.

As far as I can remember, the set up goes like this. Blower is strapped to the mount, fresh air is supplied via an air handling unit from above that is the right humidity and temp. That's the inlet. Inlet also has a cooling mdeia, kind of like they use in CNC tooling. Outlet has a mass air flow meter and drip tank to collect coolant to recycle it.
Blower is spun via a clutch coupled to a 30-40 HP 480 3 phase electric motor which turns it at a certain rpm, 1680? rpm , anyway behind the glass where the computer is that collects data is a shifter and when it is popped into second the clutch swiches and the blower is spun via a 350 bowtie motor running at 8000 rpm for 4 seconds then the whole thing is done measurements are recorded. It all looks pretty simple, the hardest peice I saw was the giant clutch. It was more of an industrail type ( heavy iron ) than anything automotive.

this is similar to what is posted above, maybe a bit more detail. One thing they did show me was that by measuring the output of the motor they can tell how much HP the blower required from the motor.

Thats all I know. If I can get my buddy to post more I will but he is rarely on a computer forum.

JS.

EDIT: please dont construe this to mean that I know alot about blowers because I don't. I am VERY new to blown alky. I just read that small think tank thread and I was shocked. Maybe WJ meant me. LOL

 

I heard it take 500-600 hp to turn a TF roots blower to 12000-14000 (blower rpm ) range.

 

Dyno

Maybe WJ mean't alot of us. Don,t feel bad I know very little. But there are some really smart people on this site. Never cared for people who didn't carry their ego's well. Anyway DMPE for the dyno. Should be ready soon. Just a small mind, trying to understand. Don