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MG MGB Technical - New Rolling Road up and running

Hi All

At last we have an up to date dyno which measures bhp using energy storage flywheel and has pau for fuelling and timing tests. Hopefully best of both worlds. I attach a graph of a Full Race 1950 B series which made 158 on my old Clayton. This B showed 145 but I gained a few with much more accurate fuel monitoring/sampling. The power was 4th gear and showed 23 bhp transmission losses.

Peter

P Burgess

Hello Peter,

Good news, you must be enjoying playing with your new toy.

Just to be sure I understand, the new road works out losses and gives you a corrected print out of power at the flywheel?

I love the power curve of that engine. Clearly not idealy suited for popping down to the shops!

David
D Balkwill

Hi David

Printout is at wheels the transmission losses were an extra 23. There will be argument as to what the 23 bhp really is, of interest we did two negative runs/coastdown runs during the session, the bhp losses went down by 4 as the transmission warmed up, this included a limited slip diff. The figures are corrected by the software to SAE J1349. There is a weather station gizmo attached to the control boxes.

You are correct about the power delivery, not a lot at 4000 :) We are pleased with the flat toruw/power curve, the engines seem very effective in the endurance races they run in.

Peter
P Burgess

I'd like to get my V8 on there once the new exhaust has been fitted. Shame its a 500 mile round trip.
Mike
Mike Howlett

Hi Mike

You are most welcome to pop in next time you are passing...next Silverstone?

Peter
P Burgess

Nice one Pete!!! I am looking forward to getting the 2 racers on it!

That's when they are finished of course!

Colin
Colin Parkinson

This thread was discussed on 03/08/2010

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