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which Garrett turbo and what intercooler

OK, I know this has been asked before. My mechanic wants a "50 state" or long neck intercooler. He also wants to upgrade to a Garrett turbo. What are your suggestions on both. The engine is a 3.5 liter with SC cams. Thanks, Tate
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Old 12-18-2009, 09:17 AM
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Highlands... beautiful place to live!!!!! I am going to PM you my number... give me a call on the above post... I have some details for you...
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Old 12-18-2009, 09:21 AM
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Old 12-21-2009, 07:54 AM
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Long Neck and 50 State have nothing to do with one another.
The long neck intercooler is OEM on the 965, the short neck intercooler is OEM on the 930. Both engines are CIS 930 engines so the 965 setup can be used on the 930 engine. Any performance benefit is from a larger intercooler and not the long/short neck as that is just BOV packaging.
Most any turbo is better than the stock 3LDZ. The K27-7200 is the stock upgrade replacement for the 930. Garrett turbos are not designed for the 965/930 and must be adapted to work. Many are using them so the adaption process is documented.
The 965 uses the long neck IC and 7200 as stock equipment so all parts are available to bolt it on to your 930.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 12-21-2009, 10:03 AM
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I use a KKK so I don't know how best to install a Garrett, but be careful of the Garrett's modified to bolt onto the stock 930 exhaust. I've seen one and was a little scary.
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Old 12-21-2009, 11:27 AM
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My mechanic seems to like the long neck intercoolers. He wants to get rid of the BOV mess?? He referred to the short neck as a "california" and the long neck as a "50 state" ?? Can someone send me a pic of the long neck? Which brands are the best? Also Brian, Can you suggest one of your turbos for my engine? 3.5 liter with sc cams. I realize that you have 4-6 different variations. I am also interested in your exhausts. Thanks, Tate
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Old 12-21-2009, 12:06 PM
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Tate,
Shoot me an e-mail and I'll send you back some pictures.

I am in the process of installing a Kokeln intercooler today. Not fun. The long neck requires changing out a lot of odds and ends and coming up with extra fittings to accommodate what you had before.
I have a very old B&B shortneck on my car and absolutely love it. I can pop it off in less than 5 minutes. It is quick because all of the ancilliary hoses and what not are attached to the 930 BOV and not the intercooler. B&B does not make that perfect fit intercooler anymore. The recession has turned good products to junk overnight as manufacturing is farmed out to China and the like.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 12-21-2009, 03:41 PM
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FWIW,

I have a 964 turbo factory intercooler for sale. Part located in 90404. perfect condition, $1000.
Old 12-30-2009, 09:26 AM
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Call Chris at Turbokraft and let him fill you in on the Garrett turbos and the options he offers. He's a very generous and nice guy to deal with. I have personally installed a GT35R on an '86 930. Be aware, its not a direct bolt-on affair, but it is close. I have plenty of pictures of my install that I can share if anyone is interested.
Old 12-30-2009, 09:09 PM
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Post em for the record!

Dose the header to turbo flange match up?
Old 12-30-2009, 09:31 PM
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Can do, give me a day or 2.

Header to turbo flange match up perfectly. Turbo exhaust outlet was 3" exactly, whereas the 930 exhaust inlet was something like 2.7"ish, although it still bolts up without fuss. Obviously a true 3" inside diameter exhaust should be used.

Quote:
Originally Posted by 911st View Post
Post em for the record!

Dose the header to turbo flange match up?
Old 12-31-2009, 02:35 PM
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Dailydriven 88, I have also heard great things about Chris at Turbokraft. I might also have him fabricate the same intercooler he has made for people wanting to use a Duck tail instead of the factory tail. I would appreciate any and all the pics you have of the Garrett turbo install. Thanks, Tate
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Old 12-31-2009, 02:37 PM
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So the GTs' bolt right up to the flange. Cool!

What are the differences between the different GT35's?

Can the hot housing be changed out easily if one wants.
Old 12-31-2009, 02:42 PM
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Not if it is a T4. Be sure to specify a T3 flange.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 12-31-2009, 02:57 PM
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Brian,

So it sounds similar to a Turbonetics program where you can order them built on modified T3 frame with larger shaft or a more standard T4 frame.

Dose the T3 & T4 flange GT35's share the same center section and compressor?

Thx.
Old 12-31-2009, 04:17 PM
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There's a lot of housing options with a GT35:

Garrett GT3582R (aka GT35R, aka GT35/40R) : atpturbo.com

V-Band clamps are so good compared to 4 bolt IMO, so fast and easy.
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Old 12-31-2009, 08:22 PM
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GT35R configured for use in an '86 930, purchased from Chris at Turbocraft. Note: I also opted to go with an aftermarket SS oil line versus keeping the stock rubber/metal hardline set up. I figured this was a good time for the upgrade and Chris provides all necessary adapters for the stock banjo bolt set up, as well as a small spring to be installed in conjunction with the ball bearing. From what I was told, the stock oil line can be adapted to work with ease.

Before (stock 3LDZ):


When you order it from Chris:



Slight sheet metal modification for clearance, initial fitment:


Final fitment:


Up pipe mock up to finished stage:



Old 01-01-2010, 10:38 PM
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Up pipe before:


After:


Turbo bracket, slight amount of tweaking/grinding to fit, nothing big:



Aftermarket SS oil line routing and install, I routed it the best way I saw fit:





Notes: Your existing exhaust should be modified b/c the GT35R will cause it to mount a bit lower and to the right. Without modification, it would look a bit goofy. If you have an exhaust with a slip fit connection, it may help with horizontal adjustment, although the vertical adjustment would still need attention. Im in the process of trying to get a hold of Chris's new exhaust system that he will be/is offering. Its looks great and is designed to be used with this turbo (3" of course). I have pictures but not sure if they can be posted yet.

On initial start up, I experienced an oil leak from the scavenge tank to its adapter at the turbo. Chris supplies you with a nice machined aluminum adapter with integrated O ring, but apparently the B&B scavenge tank's flange was a bit imperfect. The O ring wasnt enough to compensate. Rather than trying to resurface the flange, I used the oem gasket. Works fine.

If anyone needs anymore info, I'll do my best to help.
Old 01-01-2010, 10:39 PM
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So thoughts on the GT35? spool time? holding boost?
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Old 01-02-2010, 06:41 AM
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Very pleased with it. Wastegate has a .8 spring in it and that remains unchanged after the GT35. No comparison to the 3LDZ (duh!) but this same car also had a K27HFS at one point. Lots of down time in between the swap so the feeling of the HFS has faded in my mind. I do have a few dyno pulls with the HFS though that I could use for direct comparison if and when the car gets back to the dyno. It feels very strong though and boost builds pretty darn low. Next time Ive got the car out, I can tell you an exact threshold figure. It does hold the .8 all the way to at least 6k (for the street, no need to rev higher so I havent). I doubt this turbo will run out of breath for any street/mild track 930.

Oh I almost forgot, the GT35 has been installed for longer than 2,000 miles and still going. Cant say the same for the HFS!

Last edited by DailyDriven'88; 01-02-2010 at 02:14 PM..
Old 01-02-2010, 02:05 PM
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