RE: An M3 ate my Q

["Lewis, Gary M" <Gary.Lewis@West.Boeing.com>]

Igor said:


> Gary wrote:
> 
> It was ugly.  Real ugly.  Guy in a brand spanking new M3 coupe is
> tooling
> [...]
> behind me, I hear him jump on it.  So of course, I do to.  I have a K24
> turbo, 2 piece EM, chip, my 88 is no slouch.  I get 1.8 bar at 2,800
> rpm.
> There is nothing wrong with my car.  Purrs like a kitten, roars like a
> lion.
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>
> 
> Gary,
> sorry about the incident.
> 
> I did not voice my opinion then coz you have already bought the parts
> and seemed pretty determined to do the conversion on your MC-1 '89
> 200TQ. However I am pretty confident that the K24 is your biggest
> problem.
> 
> The MC-1 has a lower compression 7.8:1 (terrible off boost), but has a
> bigger K26 turbo, (capable of producing more boost).
> The MC-2 has a higher compression 8.4:1, but has a smaller turbo.
> 
> You have combined the MC-1 with the K24, i.e. the worst of both worlds
> for this particular application. You have a low compression engine which
> is a dog off boost and the undersized  turbo for this engine.
> Audi had put a lot of effort in matching a specific engine to a specific
> turbo. I personally elected not to mess with it on my own MC-1 '89
> 200TQ.
> 
I wrote a reply to this immediately, unfortunately the mail servers here
were shut down for a few days due to a nasty, pecker bending then pecker
breaking virus (and thanks for the descriptors Phil).
Anyway,

Hi Igor,
Thanks for the note.  I completely agree with you at boost pressures
exceeding 2.0 - 2.2 bar.  But I maintain positive 1.8 - 2.0 bar, _measured_
, at 5,250 rpm with the K24.  I raced both my cars, car in question, 88
5kcstq w/K24, against my 86 5kcst 5 sp w/K26, both running 1.8 bar, 2nd gear
+ 3500 RPM start (In 1st gear the FWD has a wheel spin problem).  Both cars
were dead nuts even to 80 mph (max we achieved).  The FWD 5sp weighs 300 lbs
less than the Q.  These 2 real world examples had led me to believe that at
reasonable street pressures, the K24 _is_ a great mod for the MC-1.  I get
full boost in the mid 2,000 rpm level, and no tail-off at high rpm.  I still
think (and every qhead that drives my car) this is THE killer addition to a
1.8 bar mod.  Ask Avi.  "Avi, you out there"??  It makes the car great to
drive, gobs of torque down low, and great launches.  I know you like the
K26, but I believe you've been running pressures I don't plan on
running...(or were.  Did you sell the 89??)  

Thanks for the comments Igor.  Always appreciated...

Gary Lewis 
88 5kcstq 1.8 bar 110km Pearl w/Fuchs, K24 turbo, 2-piece EM
86 5kcstqw Sapphire and Platinum, stock 
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