Great website

vtectom · Post by **vtectom** » Sun Sep 30, 2012 11:14 am

http://www.dyno-plot.co.uk/dyno/about.htm

No Prelude figures on there yet though - let's get some up.

A1ex · Post by **A1ex** » Sun Sep 30, 2012 11:32 am

I'll get my lude up on there when I get home

A1ex · Post by **A1ex** » Sun Sep 30, 2012 4:21 pm

http://www.dyno-plot.co.uk/dyno/dynoplo ... oworks.htm

Flying the PAW flag

vtectom · Post by **vtectom** » Sun Sep 30, 2012 4:26 pm

Well done Alex!

Also, I found out this week that 'assuming both Torque and BHP scales are equal
on a dyno graph, Torque and BHP will always cross each other at 5,252RPM.'

Check it out on the graphs - wish I could tell you how the maths work, but I
can't

Post by **rob quilter** » Sun Sep 30, 2012 4:40 pm

How many Elise's?

A1ex · Post by **A1ex** » Sun Sep 30, 2012 4:42 pm

I'd never noticed the crossed over! Good random knowledge!

There will be an equation applied to the torque output (which can be measured) to produce the bhp value. So if the numbers are linked this would make sense

Maybe think of it like, 20 divided by 10 gives you 2 but so does 200 divided by 100

I know! lots of k20 action there as well

littlefeller · Post by **littlefeller** » Sun Sep 30, 2012 6:41 pm

ok, horsepower, torque and engine speed are all related, if you change the the value of one it will have a direct effect on the others, for instance - if you keep engine speed the same but raise torque the horsepower will go up, if you keep the torque the same but do so with an increase of engine speed then horsepower will go up here too, some race engines actually lower torque but do so with a massive increase of engine speed thus again pushing up horespower. horsepower is derived by engine speed whilst torque is applied to said engine speed.

vtectom · Post by **vtectom** » Sun Sep 30, 2012 6:49 pm

i wish i was clever :p

littlefeller · Post by **littlefeller** » Sun Sep 30, 2012 6:52 pm

its not clever, its many years of tuning and preping 2 stroke motors for competition, the onlt reason it crosses at around 5000rpm is because most cars have a similar rev range, try this on a 2 stroke motor of say rev limit of 16000 rpm you get a different result, or with an f1 engine with a rev limit of around 18000rpm again its different