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Turbo selection

Quick question regarding turbo selection on a 3.2 convert. Is the K26 a good choice for a low boost setup? I've got a lead on one that is like new off a Porsche. Will this work with a stock 930 exhaust?Just came across this and don't have the time to do extensive research. The price reflects a need for a quick decision. I'm not interested in a wild fire breathing monster, but 300 horsepower would feed my need. Is this a good pick as a base to start collecting parts for?
Old 10-14-2009, 02:11 PM
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It'll no doubt work, may be a little laggy.

It should be cheap, they're not worth a lot...
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Old 10-14-2009, 02:34 PM
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BTW, lag isn't a real issue on 3.2 conversions as you have a lot more power off boost than a 930 as you're compression ratio is higher. It'll get you going, you might want to spring for a more modern turbo once the economy bounces back.
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Old 10-14-2009, 02:36 PM
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$120 is cheap right?
Old 10-14-2009, 02:59 PM
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I use the K27S or K27HFS on Carrera conversions with stock 930 exhaust parts. Turbo lag is non-existent and those turbos work well in low boost applications.

The K26 is not the same as a 3LDZ. Very laggy but for $120 will get you going. If purchasing used make sure the turbo is in good condition and never damaged. You don't want to throw 25 year old turbo bits through your engine.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 10-14-2009, 03:08 PM
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What does a k27s or k27hfs go for on the used market? (in good working order of course) The Carerras lag as it is, i'm not sure I want to go through all the trouble just get even more high RPM kick. Low end is where the boost is needed.
Old 10-14-2009, 03:12 PM
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Very rare to find one used. 7200 11.11 is more abundant and often removed when going to a bigger turbo. They are an improvement over the 3LDZ by kicking in by 3000rpm.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 10-15-2009, 11:02 AM
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+1 I've been able to buy a 7200 11.11 and a 7006 on ebay in the last couple months but I have yet to see an S or HF or HFS on ebay. I'd love to have one though.
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Old 10-15-2009, 11:35 AM
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K26 is smaller than K27 and sits in old Audi 100 Turbo and 944 Turbo. Thus, it ain't laggy but it's probably a tad too small for 3.2L. It would probably start boosting at 2000 RPM. Good for 250hp, not more.
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Old 10-15-2009, 01:57 PM
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3LDZ is laggy. K26 is not a stock 930 turbo.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 10-15-2009, 02:14 PM
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Who makes the 7200 11.11? Is this a reasonably priced unit? Will this make some power to the 300 HP range? Is ebay the main source for something like this?
Old 10-15-2009, 02:17 PM
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Brian, is there a source that I may read about different units, their applications and compatibilities? There is so much information out there that it almost becomes impossible to piece it all together. A search on here yields everthing a guy wants to know, but in no particular organized order. I have looked over the protomotive site several times, and this is simply way too rich for my blood. I am capable of doing the work, there are a bunch of Porsche stock components that I can purchase on the cheap to assemble this with, but it's been difficult to locate a source that "puts it all together"
Old 10-15-2009, 02:21 PM
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just bolt the K26 up, you're only going to run 5-7psi for 300-360 fwhp, all these better turbos will just be bled off through your wastegate very early. I run 7psi and my throttle is like a wastegate switch, opens almost straight away. For $120 you can't loose, just sell it later if you don't like it.

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Originally Posted by tony9704 View Post
Who makes the 7200 11.11? Is this a reasonably priced unit? Will this make some power to the 300 HP range? Is ebay the main source for something like this?
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Old 10-15-2009, 04:01 PM
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The 7200/11.11 is the stock turbo for the 965 (C2T from '91-'94). Many places rebuild and sell these turbos.
I can appreciate frugal but be careful with used turbos. If they are damaged or worn out they can cause big problems. There is a point where saving money defeats the purpose. A rebuilt 3LDZ will cost a few hundred but you still have a turbo that boosts near 4000rpm. A new K27S is $1295 and boosts to 0.7bar by 2600rpm on a stock 930 exhaust.
Using a new but less expensive Garrett GT30 will require some modification or added expense in parts/labor which again may defeat the purpose. You have to do a lot of number crunching to see what is the best bang for the buck compromise.

A single source for all things turbo is a tall order. Turbos are designed for specific applications. They will work in a range of applications but overap when parameters change.
For example, a K27-7200/11.11 will reach 0.7bar at ~3200rpm in a stock 965. A 3LDZ will reach 0.7bar in the same car at ~3800rpm. Now add headers, fuel tuning, ignition tuning and a free flowing muffler and the 3LDZ will hit 0.7bar at ~3200rpm as well.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 10-15-2009, 05:54 PM
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It looks like rebuild kits are under $100 for a k26. Seems kind of no lose either way. I'm just supposed to check for shaft play correct? Is there an acceptable amount of play or is it supposed to be 100% solid? I just want to make sure that this is something that will bolt up to a factory 930 exhaust. Yes, frugality is my game on this one. If It doesn't meet expectation, i'll pull it off, sell the car, and try to get into a 930. I've got a feeling i'm nowhere near alone in this conquest. There is a world of affordable performance out there available to those willing to do some digging. If i can find it, I will gladly post the entire process to clear things up a bit for novices like myself. Thanks for the help so far!
Old 10-15-2009, 08:36 PM
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Correct me if I'm wrong, if a K26 is used for a 944 turbo application then the turbine inlet and outlet bolt patterns are different than the 930 header, bracket, and muffler. They *look* similar, but not the same.

Turbine inlet flange bolt pattern is smaller on the 944 t
944t Turbine inlet port is round, not rectangular
Turbine outlet is about .75" shorter and has a smaller diameter bolt circle

Last edited by Jim2; 10-15-2009 at 09:15 PM..
Old 10-15-2009, 09:10 PM
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This does not sound like the application for me as I don't wish to fabricate adapter plates. I'm sure space is at a premium in the engine bay also. There isn't a simple conversion kit available is there? I'm thinking more "bolt on"
Old 10-16-2009, 03:20 AM
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Ok, what turbo is stock on a 930? Is this an appropriate match for a 3.2 conv? Or, is there a budget minded bolt on substitute?
Old 10-18-2009, 01:40 PM
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A cheap and good turbo is the older Garret T03/T04s, a well proven turbo. I've been told they have been successfully used on 3.2 conversions. They don't have ball bearings like the GT series, more inline with the technology of a K27 so they would need more oil than a GT, they have a T3 flange so will bolt straight on. About half the price of a GT but I don't know how long they will last. Like this one: Garrett T3/TO4E 60 trim w/.82 a/r

If money really is a huge concern on this project I think you might be taking something on that you can't afford... Remember your car is going to be putting out a lot more power and weaknesses will come to light, stock rear torsion bars struggle with the power and need upgrading, standard carrera brakes aren't the greatest, the rubber center clutch will s#it itself quicker, engine wear will be increased and it's first rebuild will come around faster, all expensive factors to consider...
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Old 10-18-2009, 03:37 PM
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3LDZ is stock 930.
K27-7200 11.11 is stock 965 and will fit stock 930 with 930 bracket adjustment or 965 bracket.
K27-7200 has a lower threshold than the 3LDZ and worth a few HP. Finding one used is your least expensive bolt-on.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 10-18-2009, 03:37 PM
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