Anti-turbo lag systems

[John Hess]

>----------
>From: 	Robert Harris[SMTP:bob at bobthecomputerguy.com]
>Sent: 	Wednesday, August 13, 1997 11:07 PM
>To: 	diy_efi at coulomb.eng.ohio-state.edu
>Subject: 	Re: Anti-turbo lag systems
>
>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

Why not just put a combustion chamber with an air pump lead and an
injector in the manifold?  At least, you would get all cylinders to fire
this way.

>"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>
>
>
>----------
>> 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.
>