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Re: (tech)sbc overbalance opinion

To: land-speed@autox.team.net
Subject: Re: (tech)sbc overbalance opinion
From: Bob Bridge <saltracer@shaw.ca>
Date: Wed, 30 Jan 2002 15:59:23 -0800
RE: (tech)sbc overbalance opinion

  That sounds like the engine I need.  Lets see (think think, compute compute, 
guess guess,) 640 honest sea level HP should make my girlie Camaro go 230.1999 
MPH.  I look forward to the article.
  Bob in Canada






  Bob & List, 
  Overbalancing is somewhat a common practice with NASCAR engine builders, but 
  only for some specific reasons. It is usually done only for engines that are 
  expected to rev above 8,000 RPM . Above 8000 RPM valve train and other 
  engine components tend to develop harmonics which is dampened by the 
  overbalancing. This actually does nothing to increase HP, only reduce the 
  harmonics and to it's detriment, overbalancing does increase engine 
  vibration at lower RPM ranges. Therefore, if you do not expect to run these 
  RPM ranges, it probably is not a good idea and surely a waste of money. My 
  T'Bird is slightly overbalanced but I've turned it at 9500 RPM many times 
  (it likes it) 

  BTW, I have completed the new build of the "NASCAR Street Engine" for Hot 
  Rod Magazine. The article is expected to come out sometime within the next 
  few months. It is a SB2 motor as is run by the Winston Cup teams but with a 
  street cam, 10:1 compression and a wet sump oil system. It dyno'd at 640 HP, 
  will run on pump gas and take a family of four from New York to Disneyland 
  in 8 Hours flat. I'll have it on display at the Motor Show in Daytona next 
  month. I'll post some pix next month. 
  Next on the agenda is to convert the fuel system to DFI with a Wilson 
  Manifold system and put it in a show car I've had in storage. (an 84 Iroc 
  Camaro that's just a bute) 

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