Anti-turbo lag systems

[Robert Harris]

EFI sortof.  Just this morning while I was taking a Clinton and conjugating
my navel, I came up with about the same thought.  Try this ---

To "spool" up a turbo, deterministically drop SPARK to certain cylinders
and burn the mixture in the exhaust. Maybe all it would take is dropping
a single cylinder every other revolution to quickly spool up and then stop
dropping cylinders.  Would shure beat all the gimmicky stuff - specially
if your EFI included a Rev Limiter that limits by "randomly" dropping spark

"When some one gets something for nothing -
             some one else gets nothing for something "

If the first ingredient ain't Habanero, then the rest don't matter.
Robert Harris <bob at bobthecomputerguy.com>


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> From: Bill Jenkins <muwtj1 at wiu.edu>
> To: diy_efi at coulomb.eng.ohio-state.edu
> Subject: Re: Anti-turbo lag systems
> Date: Wednesday, August 13, 1997 10:18 AM
> 
> >Not strictly DIY_EFI but sorta related.  This thread on the Saab APC system
> >has got me thinking.  I have seen several references in Racecar Engineering
> >to anti-lag systems used on current FIA rally cars like the ford, subaru and
> >mitsubishi.  In particular I was wondering how the system worked?
> >
> >I know that early eighties ferrari F1 cars used a system that bypassed air
> >from the turbo compressor straight into the exhaust system when the throttle
> >was closed and ran a rich mixture to create combustion in the exhaust.  I
> >also read somewhere that peugeot used to inject propane into the exhaust to
> >acheive the same effect before it was banned in the group B rally cars.
> >
> >Depending on how these current systems work, I would like to adapt it to my
> >current project.
> >
> >Any info would be appreciated.
> >
> >Max
> 
>    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.