[Staowners] ALPINE engine power

[Vic & Rosalie Hughes]

Hi Mal,

Can't claim to be an expert but I reckon that 50 bhp at the rear wheels @ 3000 rpm is probably not too bad.  The 80 BHP claimed in the manual would be at the flywheel, and @ 4200 rpm - more rpm (up to the peak) = more power.  Power loss through the transmission (gearbox and diff) accounts for some of the difference, lower than peak revs accounts for some more.  

My Series III Alpine is rated at 82.5 gross, 75 net @ 5000 rpm at the flywheel. It dyno'd 58 bhp @ 4000 (it too was running in) 

Cheers, Vic
  ----- Original Message ----- 
  From: Mal Clark 
  To: Staowners at sunbeamtalbot.info 
  Sent: Monday, May 05, 2008 9:41 PM
  Subject: [Staowners] ALPINE engine power


  Hi everyone,I have been without my computer for a few weeks, now up and running ok, my Alpine is just about finished and driving and running beautiful, highly recommend Jim Wilkinson's Power steering kit,dont think he as yet come up with a left hand drive kit, it makes the Alpine driving a dream so so good,and with the Toyota Celica 5 speed gearbox as well it is superb, Today I had my alpine on the Dyno,I felt is wasn't quite right,being a new engine I didn't want to damage it, as it turned out it was running very rich so different jets in the carb and resetting the timing,etc produced an extra 7 kilowatts of power,the question I have,someone out there must know more than me on these power outputs, the first run up to only 3000rpm (NEW ENGINE REBUILD) on the Dyno it produced 30 kilowatts of power after the rejetting etc it produced 36.7 kilowatts . if you multiply the kilowatts by 1.34 it gives you the horse power,so it is producing 50 HP at 3000rpm at the back wheels, can someone tell me if that is good or average, as I have worked the motor, quite a bit,as I said it drives great, Manual states 80 BRAKE horse power for the Alpine, regards Mal Clark.


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