I'm gonna go against the grain and general consensus here and offer some food for thought.
miata wrote: ↑
Tue Jun 15, 2021 1:52 pm
I am just a bit beyond experimenting by now.
If you have a few projects that need a wind machine for testing on a limited basis, then I stand corrected and the previous advise on the LS platform with gear is a great solution (I'm building one myself). But, if you are looking to build long term, money making workhorses that blow poorly made impact windows and shingles back to China, then copying our lead on Hot Rod solutions will just be the start of your experimentation, starting with figuring out which oil diapers absorb the most oil from blown engines.
We build and run hot rods that regularly can and do make 200-600 Hp easily and produce the kind of wind figures you are looking for, but none of these solutions are going to last long very long putting out 300 Hp for 45 minute pulls, max power on these setups is measured in seconds and average power needs are well under 200 Hp.
miata wrote: ↑
Mon Jun 07, 2021 7:34 am
twin engines, these are workhorses. 3k rpm, full load for about 45 minutes at a time.
miata wrote: ↑
Mon Jun 07, 2021 10:42 am
High-speed wind testing
I use 2 of these 500's to blow through a flow straightener, creating what is basically an outdoor wind tunnel.
each test is about 40 minutes of full load @3k rpm
All weather conditions, freezing rain to 110°F summers.
You describe these as workhorses and you are obviously looking to make money providing a test platform. What is unsaid is your expectation for total yearly hours and your risk vs. reward tolerance for reliability and longevity.
In my opinion you are looking for industrial solutions rated for continuous duty (at least intermittent) industrial applications. Just look at the spec sheet that Heavy posted for that Ford 460, 175 Hp Continuous and 200 Hp Intermittent. Throwing a stroker crank into that engine (or other other hot rod solutions) and adding RPM to increase power are not going to improve longevity. With industrial engine ratings, Intermittent typically means 10 minutes for every hour of operation.
The two options I would be looking at are industrial rated engines (gas or diesel, your preference) factory rated for 300 Hp continuous with a gear/belt system to achieve the prop speed you need, or electric drives using commercial 3 phase power or diesel generators depending on power availability. A big advantage of an electric solution would be the ability to use 2 motors (50% of the power each) facing each other with 2 props counter rotating which would delete the need for the flow straightener and reduce total power consumption. Add in a VFD (variable frequency drive) and you would have the ability to vary prop speed remotely and log all kinds of performance parameters. Another advantage of electric drive would be significantly reduced upfront cost (capex) if you are on a budget to start out as you can rent the generators as needed making them billable at cost + per job.
It's all big stuff and requires semi's to haul around, I'm running 6x 300 kW (400 Hp) diesel gensets pushing a butt load of big electric motors on a job right now. They run 12 hours per day and I fully expect them to be running just fine next March when this job is complete and ready to move onto the next.
Good luck what ever route you decide to take.
I still think I-10 is the Mason Dixon line.
2013 Mike Stossel Boats, 13' x 7' deck over, IO-540, 74" NGQ less winglets.