graph fun
Turbo Mini Forums

i was doing a bit of number crunching with the acceleration runs ffrom the spud ,and thought it might be interesting to compare the real world graphs with those from a drag analyser software i have

then used the real time graphs to make a more accurate model

this worked well ,so then i thought ,how bout stepping up the hp in steps ,and making a graph of bhp versus terminal speed at the 1/4 mile .
i could use this to guage bhp at the track , ,

this is based on my car with the group 5 arches etc ,so would have a higher drag than some other minis,but i thought it may be interesting to some of the crew on here .
bear in mind that the top end speed is very related to bhp, but will also be affected by weight 60 ft time etc to some degree .

regards
robert.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

That's very interesting.

Is that bhp at the wheels?

I always used to use the rule that if you multiplied the terminal speed by the ET you should get 1320. So using that rule, the graph also should give a theoretical ET.

I think that because high hp turbo Minis are slow off the line, the ETs are usually a bit higher.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

sorry just read it again and its based on your car!
looks good though.

Edited by JT on 25th Feb, 2007.

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

thanks axel yes i thought it was too ,
thats bhp at the crank , and it prob wont necessarily compare with the rr results all the time , i know that when i was testing cars on the rr sometimes just closing the bonnet would drop a fair few bhp .so at the track with bonnets shut and higher temp it all combines to give a lower figure sometimes ,unless of course all that has been programmed into the rr software and its testing situation is similar to the track bonnet shut etc .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

hmm very intriging

what do you think causes the slight spike at 100mph?

i crossed at 106mph, and the car was rr'ed on peter baldwins at 188 at 14psi, though i was running 18psi at avon.

Ive noticed that each psi seems to give an 11 banana increase. However i was running low compression on one cylinder at avon (this happened after the rr), so im not sure how much difference that would have made

also baldwins rollers are a bit high

though this looks like it could be somewhere near right fomr my experience

i put that down to a operator error nic !!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Very interesting. I cross at a shade under 100mph and have circa 140banans.

So looks reasonable.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph