Blower RPMs

[1900 North]

I’m hoping to learn the factory set RPMs of the blowers (and engines) on the Prochem 370, Peak 500 (same blower as the 370 but better air flow) and the 650.
Can any of the three be spun slightly faster through engine speed or pulley changes to increase airflow, preferably without causing long or short term damage to any of the components?

 

[FB19087]

sapphire 370ss 3402 RPM (GD TI406)
peak 500 3402 RPM (GD TI406)
Everest 650 3125 (GD TI410)



edit:not 408

 

[1900 North]

sapphire 370ss 3402 RPM (GD TI406)
peak 500 3402 RPM (GD TI406)
Everest 650 3125 (GD TI408)

Thanks Fred. Am I mistaken that the Peak set up moves more air than the 370? Just to double check, the 650 is a 408, not a 410? Can any of the blowers spin a bit faster without damaging the blower and improve performance?

 

[Lee Stockwell]

Thanks Fred. Am I mistaken that the Peak set up moves more air than the 370? Just to double check, the 650 is a 408, not a 410? Can any of the blowers spin a bit faster without damaging the blower and improve performance?

Yes! We've done it. However there is more potential gain in fixing other plumbing restrictions.

 

[FB19087]

Thanks Fred. Am I mistaken that the Peak set up moves more air than the 370?

Idk. I would assume increased room and potentially less restriction would allow for more cfm

Just to double check, the 650 is a 408, not a 410?

410....I put 408 by mistake....will edit

Can any of the blowers spin a bit faster without damaging the blower and improve performance?

you could provided the horsepower is still there at the desired RPM. The increased load/heat/etc would likely wear out components faster

 

[Lee Stockwell]

My son Jason spun a virgin Bane 33 up to 4000 rpms with a 17hp motor.

We quit making so many trips to Indianapolis after that.

 

[Hack Attack]

I've read on old posts of some of the garage builders running 10% over

when you consider that these blowers aren't made specifically for this industry, and the hrs they run nonstop elsewhere 10% over sounds feasable

 

[Cleanworks]

I've read on old posts of some of the garage builders running 10% over

when you consider that these blowers aren't made specifically for this industry, and the hrs they run nonstop elsewhere 10% over sounds feasable

Comes down to how much you want to make sometimes. Faster you run it, the louder it is.

 

[Hack Attack]

Comes down to how much you want to make sometimes. Faster you run it, the louder it is.

faster it runs also the cooler its exhaust runs, so depends if you've got a blower heatexchanger too

 

[Lee Stockwell]

faster it runs also the cooler its exhaust runs, so depends if you've got a blower heatexchanger too

NO. The faster you run a blower the hotter its exhaust, largely due to the compression of exhaust gasses.

 

[Hack Attack]

NO. The faster you run a blower the hotter its exhaust, largely due to the compression of exhaust gasses.

again only going off what I've read from old posts.

but thought the rationale was higher airflow less chance to pick up blower heat, therefore cooler?

higher Hg the blower is working harder (more heat) less airflow (more transfer of heat) theories are wonderful things

 

[1900 North]

Yes! We've done it. However there is more potential gain in fixing other plumbing restrictions.

I’d love to hear of plumbing restrictions that could be changed on the 370 and 650!

 

[hogjowl]

Oh lord ...

 

[Lee Stockwell]

Mainly alluding to the garage builders in TX that buy 2 inch galvanized elbows by the pallet full.

(although Prochem's vacuum relief tee at the blower could be redesigned)

 

[FB19087]

again only going off what I've read from old posts.

but thought the rationale was higher airflow less chance to pick up blower heat, therefore cooler?

higher Hg the blower is working harder (more heat) less airflow (more transfer of heat) theories are wonderful things

I think Lee is talking about the actual temp rise of the blower and you are talking about the velocity through the heat exchanges allowing less time to give up heat..

 

[hogjowl]

I don’t care either way

 

[Hack Attack]

I think Lee is talking about the actual temp rise of the blower and you are talking about the velocity through the heat exchanges allowing less time to give up heat..

maybe I'm misreading the heat rise chart on urai 45?

 

[FB19087]

maybe I'm misreading the heat rise chart on urai 45?
View attachment 102102

You aren't...except the rpm is static...so as airflow goes down and lift goes up the temp goes up


your second statement seemed to be referencing transfer time in the exchanger

 

[1900 North]

I don’t care either way

Then, according to the Cheshire cat, it really doesn’t matter which way you go. Enjoy your journey. Be sure to write, or at least a card at Christmas.

 

[Dolly Llama]

Then, according to the Cheshire cat, it really doesn’t matter which way you go. Enjoy your journey. Be sure to write, or at least a card at Christmas.

agree
Having been a CC'ing rocket surgeon 20+ years ago with this that and other mod to eek out the last nano minuscule of performance ...
I've discovered it was/is so much overthinking and didn't make a dime's worth of difference as a practical matter


..L.T.A.

 

[Lee Stockwell]

If you restrict the exhaust of a PD blower the temperature rises proportionately. Thus many post blower designs severely do just that.

 

[Lee Stockwell]

Remember the "gas law" from physics class.

 

[Cleanworks]

Remember the "gas law" from physics class.

Don't pass gas in class?

 

[BIG WOOD]

I’d love to hear of plumbing restrictions that could be changed on the 370 and 650!

The only restrictions that those two models have is the first 50ft of vac hose connected to the tm. Just get 25-50' of 2.5" hose if you're looking for more suction. Other than that...adjust the hg up to 14" from it's current setting, and get a rpm gauge for the 370 to make sure it's set at 3k rpm on the engine. Suction on those two truckmounts is very good as is. I've seen both directly on the job. No need to do any more

 

[Lee Stockwell]

Restrictions can be measured with a pressure gauge or conversely, a vacuum gauge.