[s-cars] Turbo replacement

Lewis, Gary M gary.m.lewis2 at boeing.com
Tue Nov 18 10:29:47 EST 2003

The K24 Compressor does move more air SOONER, however the exhaust turbine really limits how much air the K24 can pass.  It is a plug on the system.  I bent and BROKE teeth off my K24 turbine wheel when the shaft noodled at 24 psi (in his defence, Pastore warned me).  You may want to read that again...

Anyway, my take on the turbo thing...

The K26 in stock trim (#6 turbine) will ultimately move more air, but you are looking at a 4,000+ rpm spool-up.

There are some really great options available right now.  The stock RS2 is great, IF YOU CAN GET ONE.  And they seem to be expensive ($2,000).  If you are going hog-wild (full RS2 Spec, 26 PSI), some of the hybrids are great.

In no particular order

RS2 Comp - Really awesome, hard to get, very expensive.  I have never seen one, but I have seen 3 that were claimed, and turned out to be modded K24's, some with hammered turbines.

K26/6-K26 w/large compressor opening - What I have.  Innovative Turbo cuts off the stock K26 compressor opening (44mmish), and attachs a K24 sized compressor opening (48-50mmish), with attendant compressor to match.  Bolts right in, $950 w/core.  Performance very similar to the RS2 Comp. above except the K26 compressor housing is larger, so the density is better (density = more power).  26 PSI at 3,400 (3rd gear), very linear, boost starts around 2,600.

K26/6-K27 If you have a love of above 4,000 rpm boost level, this guy is great.  Not sure if it bolts right in however, the compressor inlet looks too big for the stock hose.

K26/Garrett Hybrid.  Similar to the K26/6-K27, except the boost thresholds are much lower, more in line with the Innovative K26/K26 hybrid described above.  Great turbo (probably the best) for just balls out performance.  In the $900 - $1,000 range.  The 2 reasons I didn't go for one of the Garretts are the mechanical incompatibility (oil and water lines, and intake hoses, which seem to add $300-$400), and they seem to have a less than 40,000 mile lifespan, based on user comments.  And some of them smoke like chimney's.

Gary Lewis

1995.5 S6 Avant, Green/Ecru, RS2 MAF, RS2 Exhaust Manifold, RS2 Injectors, Custom Turbo (K26 Turbine, Factory K26 Cold side (Audi Works '999' P/N) with 50mm intake and custom Innovative Turbo compressor wheel), Bilsteins, Eibachs, Big Reds.

> -----Original Message-----
> From: Mark Strangways [mailto:strangconst at rogers.com]
> Sent: Monday, November 17, 2003 7:30 PM
> To: Lino M. Valadas
> Cc: Audi S Car List
> Subject: Re: [s-cars] Turbo replacement
> yeah it'll bolt up just fine.
> Longer spool-up times will be yours.
> Not sure 100%, but I thought that the K24 compressor moved
> more air also.
> I have driven an S6 with a K26 from an MC motor (I think),
> and I will keep
> my K24.
> Is your broke ?
> Give Carl a call at ADP in Markham, they can either fix yours
> or get you the
> parts to do it yourself.
> They also carry many other turbo's K27's, all garrets and even (still
> waiting the part numbers) the RS2 turbo's
> Mark S
> ----- Original Message -----
> From: "Lino M. Valadas" <l.valadas at rogers.com>
> Cc: "Audi S Car List" <s-car-list at audifans.com>
> Sent: Monday, November 17, 2003 10:10 PM
> Subject: Re: [s-cars] Turbo replacement
> > Hi  there
> >
> > Do you know if a kkk 26 bolts up to where the kkk 24 was on
> a 93 S4?  And
> if
> > so has anybody done it?  What are the pros and cons.
> >
> > Any feedback would be appreciated.
> >
> > TIA
> >
> > Lino
> >
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