Now for some billet DYNO Porn

wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
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snowxr

snowxr

V watch your daughters V
Location
Waterford, MI
The dyno may not give actual HP numbers. The numbers could however be used to compare power output of different engines, and different carb/pipe/porting/compression setups. Peak numbers are not the only thing that matters, either. Torque, rpm, and range of usable power are important, too.
 
Dustin Mustangs

Dustin Mustangs

uʍop ǝpıs dn
Location
Holland, MI
I'd rather see the curve than just a number. Both would mean a whole lot if you tested some other 'benchmark' engines on the same dyno for comparison. I'll never understand why people in this industry are so weird about dynos.

If this is porn than I guess I have blue balls.

:thumbsdown:
 
snowxr

snowxr

V watch your daughters V
Location
Waterford, MI
Brian,
Thank you for showing off the dyno. Seeing that you're setting up the timing brings a question to mind. Have you noticed any of your MSD pickup mounting plates having the holes not timed correctly? I've had to move some pickups as far as .100" to make them 180 degrees apart.

Thanks again,
Kurt
 
SJBrit

SJBrit

Extraordinary Alien
Location
Bradenton, FL
Dustin Mustangs said:
I'll never understand why people in this industry are so weird about dynos.
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I think it's the riders who are weird about dyno numbers, and therefore the builders are wary about publishing them. It's not at all easy to look at HP and torque curves and translate that into how a motor feels on the water. People get too obsessed about how much HP they are making when tat's just one of a number of factors in terms of how well the motor works for you. And let's not forget that the pump plays a big role in how a ski feels to ride.

Couches get into HP wars since it looks great on the marketing slicks and sells skis. I hope we're a little smarter than that around here.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
A ski that makes 150 hp at WOT may be a turd coming out of the hole (where we need the power) compaired to a 110hp motor that may make way more power at the lower to mid RPM band.
 
SuperJETT

SuperJETT

So long and thanks for all the fish
Location
none
Every dyno is setup differently and can give different numbers, plus the operator can make it ready whatever he wants. However, if you have an engine on a dyno and make a baseline run, then you can compare later runs on that same dyno after changes to see if there was an improvement or not.

If they were to toss out a number, then someone else would just say they made 5hp more or whatever. The proof is in the pudding, if they can use it to make engines that really perform, down the road people will find that out based on actual experience and the number doesn't really mean much.
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
yamaslut said:
I am not a "engine guy"... Just wondering why would the numbers not mean much?? They seem to be important in cars and so on.
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I just posted the pictures for a teaser.

It is the same in cars, it can be made to say whetever the operator wants.

The only relevance is if you are able to compare setup to setup, back to back, on the same equipment, in as close to the same time of day, with the same conditions.

Yep, and when you post a number there are a hundred guys to post that they don't beleive it.

It is reality, the "brake" can be set wherever you want. You can stop the motor DEAD at a full pull just by turning the knob.

The number could be made to say whatever the operator wants and the number is not even relevant, just a way to make motor setting changes and observe the difference while allowing the engine to run under a load.

We'll see, as I have stated before in the past, DASA is Dan's shop, if he wants me to post a figure I will. But he has told me in the past, dyno figures on the internet cause nothing but problems.

But mark my words....

Brian
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
Exactly.

snowxr said:
The dyno may not give actual HP numbers. The numbers could however be used to compare power output of different engines, and different carb/pipe/porting/compression setups. Peak numbers are not the only thing that matters, either. Torque, rpm, and range of usable power are important, too.
Click to expand...
 
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