Marine “Prop-Shaft” Dynamometer

OneCycle · **Posted:** December 3rd, 2012, 12:10 pm

13" toroidal-flow water-brake absorber, heavy-duty electronic torque arm transducer (can be used with either CW or CCW rotation), engine load control, DYNOmite LCD equipped handheld data-acquisition computer, AC power supply/recharger, a set of prop-shaft mounting hardware, data wiring harness, manual, stainless-braided hoses (with an anti-scratch covering), and protective carrying case. Watch the video!

The lightweight DYNOmite absorber installs, like a prop, on most 50 Hp outboards through 502ci stern drives. During testing, you sweep the desired RPM range by adjusting its load valve. This controls the water level inside the absorber - which changes its rotor’s load (like having an adjustable RPM test tank wheel). The DYNOmite’s computer records the resultant torque at the absorber’s housing (along with the RPM) to calculate: Hp = Torque (in foot pounds) x RPM / 5,252.

$7950.00 USD

I'll put $500 toward it we only need 16 more donations of $500 and you get free dyno readings for the rest of your life .... who else is in ? M.R.S needs a DYNO for prop shaft HP

Andrew4ce · **Posted:** December 3rd, 2012, 12:58 pm

A friend of mine in Michigan is a shop teacher... he has the best Hot Rod (outboard race engine manufacturer) engine program in North America. His secret... convince the school they needed a dyno so kids working on lawn mower engines and such could test their engines to see if they performed properly after fixing them. haha. It was convienently setup to work with outboard motors too.

SHIVERS · **Joined:** April 21st, 2012, 1:57 am **Posts:** 411

there's a few more pieces you need to crank out a 502.! We had one at championship and it was the land and sea hydraulic! Worked great for outboards,didn't even need to hook up the dyno water cooling! tried it on a 320efi mercruiser and the oil temp in the dyno went to 250 in about 30 sec.! you haven't heard an outboard sing unless you've stood 2' behind it at full rpm and load!

Himagain · **Joined:** April 14th, 2012, 5:59 pm **Posts:** 564

OneCycle wrote:

13" toroidal-flow water-brake absorber, heavy-duty electronic torque arm transducer (can be used with either CW or CCW rotation), engine load control, DYNOmite LCD equipped handheld data-acquisition computer, AC power supply/recharger, a set of prop-shaft mounting hardware, data wiring harness, manual, stainless-braided hoses (with an anti-scratch covering), and protective carrying case. Watch the video!

The lightweight DYNOmite absorber installs, like a prop, on most 50 Hp outboards through 502ci stern drives. During testing, you sweep the desired RPM range by adjusting its load valve. This controls the water level inside the absorber - which changes its rotor’s load (like having an adjustable RPM test tank wheel). The DYNOmite’s computer records the resultant torque at the absorber’s housing (along with the RPM) to calculate: Hp = Torque (in foot pounds) x RPM / 5,252.

$7950.00 USD

I'll put $500 toward it we only need 16 more donations of $500 and you get free dyno readings for the rest of your life .... who else is in ? M.R.S needs a DYNO for prop shaft HP

I know where there is one of those!!!!

OneCycle · **Posted:** December 3rd, 2012, 4:22 pm

Himagain wrote:

OneCycle wrote:

13" toroidal-flow water-brake absorber, heavy-duty electronic torque arm transducer (can be used with either CW or CCW rotation), engine load control, DYNOmite LCD equipped handheld data-acquisition computer, AC power supply/recharger, a set of prop-shaft mounting hardware, data wiring harness, manual, stainless-braided hoses (with an anti-scratch covering), and protective carrying case. Watch the video!

The lightweight DYNOmite absorber installs, like a prop, on most 50 Hp outboards through 502ci stern drives. During testing, you sweep the desired RPM range by adjusting its load valve. This controls the water level inside the absorber - which changes its rotor’s load (like having an adjustable RPM test tank wheel). The DYNOmite’s computer records the resultant torque at the absorber’s housing (along with the RPM) to calculate: Hp = Torque (in foot pounds) x RPM / 5,252.

$7950.00 USD

I'll put $500 toward it we only need 16 more donations of $500 and you get free dyno readings for the rest of your life .... who else is in ? M.R.S needs a DYNO for prop shaft HP

I know where there is one of those!!!!

Care to Share?

Himagain · **Joined:** April 14th, 2012, 5:59 pm **Posts:** 564

Birch Point Marina has one they use it to Dyno the Turbo cats before and after the mods....

DoktorC · **Posted:** December 3rd, 2012, 7:46 pm

Himagain wrote:

Birch Point Marina has one they use it to Dyno the Turbo cats before and after the mods....

So is it all dented up from shrapnel?? or...wait...low hours right? cuz they don't run too long... :lol:

dubber · **Posted:** December 3rd, 2012, 8:12 pm

Maybe the price to dyno your motor at Birch point is in better interest than buyin one that likely needs to be maintained etc.. This is not a cheap toy to say the least. Besides, if someone had a dyno we wouldn't be able to complain about any more speed claims for little motors

DoktorC · **Posted:** December 3rd, 2012, 8:20 pm

dubber wrote:

Maybe the price to dyno your motor at Birch point is in better interest than buyin one that likely needs to be maintained etc.. This is not a cheap toy to say the least. Besides, if someone had a dyno we wouldn't be able to complain about any more speed claims for little motors

Exactly.....besides....dyno racing gets boring...

LittleCharger · **Joined:** April 1st, 2012, 12:29 am **Posts:** 1445

DoktorC wrote:

dubber wrote:

Maybe the price to dyno your motor at Birch point is in better interest than buyin one that likely needs to be maintained etc.. This is not a cheap toy to say the least. Besides, if someone had a dyno we wouldn't be able to complain about any more speed claims for little motors

Exactly.....besides....dyno racing gets boring...

Can't measure set up!

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Marine “Prop-Shaft” Dynamometer

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