Anti-turbo lag systems

[Simon Quested]

Hi All

>    I will say that I saw quite an interesting thing of the sort one time.  A
> Mitsubishi Eclipse Turbo came in with a fried plug wire; therefore it was
> firing on three cylinders, running rather roughly.  However, all of that
> fuel was dumping into the exhaust manifold.  Therefore, you could rev the
> thing in neutral, and the turbo would start whining (we had the intake hose
> off) and the boost would come up.  It was the only car I have ever seen that
> could get full boost without moving.  Really neat.  The extra fuel and air
> in the exhaust manifold was burning, and propelling the turbo.

Martin mailed me a similar Idea.... 

From:             Martin Ruddick <RUDDICK at clear.co.nz>

Re getting more boost lower down, the Autronic and similar EFI units
have anti-lag set up on them. with it running on our rally car we get
approx 1 bar of boost at idle (2500 rpm idle though) basically they
retard the ignition by about 35 degrees, so that the cylinder fires
way after TDC. this means you get the same volume out the exhaust, but
the engine rpm's don't rise. Hit the throttle and the ignition
switches back to normal, and you have a spooled up turbo. Rather
interesting to watch in action, however our driver finds it a bit
awkward on the road sections when corners etc approach as it maintains
that 2500 rpm idle unless you switch the anti-lag off.

Cheers

Simon
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  Simon Quested (E-mail questeds at lincoln.ac.nz)
  Computer Technician, Silicon Graphics & Windows NT Support
  Centre for Computing and Biometrics
  LINCOLN UNIVERSITY OF NEW ZEALAND
  Phone (64)(03) 3252811 Ext. 8087
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http://www.lincoln.ac.nz/ccb/techs/simon/default.htm
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