[s-cars] installing a hybrid turbo

[djdawson2 at aol.com]

You can go down to the 46 trim and get very fast response.  However, the 46 trim tolerates high boost, low flow (read: the Audi 2.2) less than the 50 trim.  I have worked with 50 trims with a stage 1 wheel, and they boost very fast, and don't have surge issues, if you stick to a peak boost of about 21psi.  You will loose some top end as a result of using the smaller turbine wheel, due to increased backpressure.  But it does perform very well.
 
Dave
 
 
-----Original Message-----
From: calvinlc at earthlink.net
To: djdawson2 at aol.com; jim.green at gmail.com; gcmschemist at gmail.com
Cc: s-car-list at audifans.com
Sent: Sat, 12 Aug 2006 12:19 PM
Subject: RE: [s-cars] installing a hybrid turbo


I think this answered my question about who has less tolerance for lag :)
My question is (as someone who probably has even lower tolerance for lag
than Dave) is there anything equivalent to the 2871 in a journal bearing
format.
--Calvin


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of djdawson2 at aol.com
Sent: Saturday, August 12, 2006 9:45 AM
To: jim.green at gmail.com; gcmschemist at gmail.com
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] installing a hybrid turbo


Jim,
Yeah... you let me know when you've got 30k miles on your FIRST big ball
bearing turbo  ;-)  I am a real believer in the performance of the GT-R
series turbos, just not the longevity.

And I'm well aware of our differences WRT boost threshold...  Jim is OK with
boost hitting at 4500rpm, so that he can make 500whp.  It's cool in a car
like his, but for a daily "normal guy" situation, I don't think it would be
suitable to most folks.  Even with my GT30R, I don't get "the hit" until
about 3800rpm.  For me, this is fine, simply because the engine is very
willing to rev, and runs great past 8000rpm, and has enough power to pull
the hills well before 3800rpm.  In the end, I have a very strong power band
spanning 4000+rpm, better than an RS2.

That being said, it is still a matter of personal preference.  I simply
suggest the 50 trim with the stage 2 because I've heard many complaints from
folks that have tried the typical 50 trim stage 3 approach.  If it is a
daily driver, and you wish to maintain a significant amount of the original
low end grunt, this is a good option.

However, if you want 5xxwhp, call Jim... he'll get you started!

Take care,
Dave


-----Original Message-----
From: jim.green at gmail.com
To: gcmschemist at gmail.com
Cc: s-car-list at audifans.com
Sent: Fri, 11 Aug 2006 8:56 PM
Subject: Re: [s-cars] installing a hybrid turbo


 Eric, I haven't been following all of this and I'm replying on my way to
the bar, but Dawson has given you some very good info.  I ran the 50 trim
K04E/stage III T3 on the 10vt for a very long time, it was by far the best
street journal bearing street turbo out there.  I do have to disagree with
Dave about the GT turbos though.  I'm running a GT35R on the 20vt right now
and it has made me a real believer of the BB turbos.  I think Dave and I
have very different ideas of acceptable lag though just so you know.  The
GT3071 is proving to be a favorite among many ur-s owners.


> --
> Jim Green
> '89 90 GT35R quattro
> '89 80q
> http://www.mswanson.com/~jgreen/car_home.html
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