16 replies to this topic

[PaddyShepherd]

Hi,

As part of a project unit at college I'm designing (and later creating) a new exhaust for my mini. In one of the assignments I need to 'produce graphical and statistical data' as evidence to show why I chose one design over another.

So for the graphical ideally I need some dyno results. So, if any of you have any for a relatively standard mini, and wouldn't mind me using them as part of my assignment (it will obviously have to be referenced), could you please send me them or post them here?

[MrBounce]

Interesting idea Paddy. However, you would ideally need a "before & after" graph for the same car so your findings are more accurate. Different cars can be VERY different even though they are supposedly mechanically identical.

[PaddyShepherd]

Yeah I know, it doesn't have to be anything accurate, just rough estimations. Ideally I need three - as I did three designs. I can then compare them against each other and wouldn't need the before and after :)

[holmesy]

vizards book has a load of flow information on exhausts

[PaddyShepherd]

is it online anywhere?

[ANON]

i wonder what would happen if you put 'dyno charts' in to a google images search??

[PaddyShepherd]

I've tried, but they are too varied. A lot of them are well modified mini's, not close enough for a comparison between simply modified minis.

[jaydee]

Ask KC
hes probably got some old dyno print-outs of same cars with different exhausts

[PaddyShepherd]

this the guy?
http://www.theminifo.../user/41875-kc/

[jaydee]

Keith Calver, hes usually helpful when it comes to such stuff

[998dave]

Why not get the student version of Ricardo Wave, and enter into that a standard exhaust, and your designs.
Wave will then plot the graphs against eachother, and if you enter the correct Boundary conditions provide power and torque figures.

This would also allow you to tune your runner lengths for the best performance.

Dave

[PaddyShepherd]

Dave, could you PM me with more details? I'm not familiar with such software.

[Kam]

this the guy?
http://www.theminifo.../user/41875-kc/

Though he's not the guy he's gonna have ALOT of visitors to his page now!

[PaddyShepherd]

so where can I find this Keith Calver then?!

[jaydee]

http://www.calverst.com/main.htm
http://www.facebook....alver.5?fref=ts

Dave's comment makes me think you can also try dynolicious for iphone and use it for rolling road your car. Its an educated guess of bph but it gives you graphic print outs