Quote:
Originally posted by EGSMachine:
i was planning on racing/autoX, and some streetrodding, so driveability is important. However, i think that the weight of the shafts, both static and rotational, is worse than a single crank mounted harmonic balancer. any of you racers that have run without the shafts, i am very interested in your input about engine performance along these lines.
Thanks,
e
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We campaigned a 944na in POC Clubracing for 2 seasons on the same engine. It had been balanced and ran without balance shafts. Once beyond idle, there is no discernable difference without the balance shafts. The balance shafts really are there to prevent the engine from vibrating the rest of the car loose AT IDLE and lower RPMs. Nor did removing the balance shafts create any significant gains in power.
But for your purposes, I would keep running the balance shafts. If the car is to be a street driven car, you really should run them. The difference between a Race engine and a Street engine is that race cars are generally driven with the throttle wide open almost always where street cars are rarely wide open. Even in AutoX applications, you spend a lot of time at idle while waiting your turn to run.
Remember, just because it works on the track doesn't mean it'll work on the street.
Regards,
David
PENNYWEB/REALRIDE.COM RACING
http://www.RealRide.com