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Join Date: May 2011
Posts: 23
89 Carrera 3.2L at 0.5Bar Boost

Hey guys, I'm still doing my research into how to properly and safely turbo an 89 carrera 3.2L at 0.5Bar.

My dilema now is to decide which turbo to go with. This is street only, limited highway so I probably want a turbo with around .70 AR that can spool up fairly quick around 2600 - 3000 RPM.

Options are:

1. K27-7200 or K27S - Around $1400 new including shipping, etc. Sounds like this is a good fit but may need more oil requirements? Would I need a scavenge tank and pump for this one? What is the inlet/outlet size on the compressor side? Rarly8?

2. Garrett GT3076R - Close to $2000 new. Looks like also nice fit, and may not have as much oil requirements, but all I can find are with 4" inlet at the compressor side. Any sources for these other than ebay?

3. Looks like Precision have some decent prices $600 - $800 for 0.6 or 0.7AR. However, oil requirements are unknown and compressor maps are not available. Anyone using these here? Which model should I be looking at?
Old 12-02-2011, 06:44 AM
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Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
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You should be able to get Garrett's far cheaper than that.

If I had the disposable income, I'd get the Garrett ball-bearing with a twin-scroll housing. Then get a divided header.

It'd be hard to beat that combo regarding spool time.
Old 12-02-2011, 07:40 AM
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If it were me, I'd go with a K27S for lower RPM spool and ease of compatbility. however, I will say that my K27 ($600 NEW) builds boost at 2100 RPM and is in full tilt at 3K! I'm using gravity drain with 15 degree decline to crank case oil drain and works great! Good luck.

Last edited by cliyde; 12-02-2011 at 09:52 AM..
Old 12-02-2011, 09:49 AM
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Location: Melbourne, Australia
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ATP is a great source for Garretts, I got my GT3071 for $1200 I think. Have had it for nearly 4years, it's awesome. Bearings still have no play, you can hear it spinning for about 10 minutes after the car is shut off. It also allows you to use v-band exhaust connection which is such a bonus, drop a muffler in about 30 seconds, no gaskets and rotate it to get the exact exit alignment. The fact the Garretts don't flow a lot of oil means less heat in your oil system and less chance of it not draining when using gravity. Clyde has had success with gravity draining a K27, many haven't.

Garrett GT3076R (aka GT30R aka GT3037) Ball Bearing Turbo : atpturbo.com
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Old 12-02-2011, 02:54 PM
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turbo 3.2

Thanks spence, I'll try them.
Old 12-02-2011, 03:54 PM
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Brando
 
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Location: Las vegas
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Also check turbokraft. I got a gt30r with an inlet that was milled for correct fitment. Chris said it made it a bolt on which it is other than the oiling issues which are easy if you drain. I used my scavenge pump. Great little turbo and good option in my book.
Old 12-02-2011, 05:13 PM
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