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Turbo build

new parts list...
Started my shopping list and have purchased a few items....if anyone has recommendations of where to buy or have anything in the list for sale I would be very interested!! I am going Twin Turbo EFI Twin Plug
Compression still to be determined =8.0:1 or 8.5:1

Crank trigger, Serpentine belt conversion
Bosch IAC with 2 wire conversion
Map Sensor 2 or 3 BAR
MAT Sensor
Cam Trigger
TPS (TBD)
EGT
WideBand o2
Knock Sensor Kit
Bar plate for Knock Sensor Kit
APR Head Stud Kit
Exhaust
Gasket Kit, Oil Lines, Plugs, Misc
Carrera Intake 3.2
Pistons and Rings
EFI, Ignition (Tech3r )
Cam Chain Tensioner Kit
Fuel Rail (TBD)
Injectors (TBD)
Injector Harness
A-N Fuel Lines, Misc Fittings
Machine Shop (have)
Upgraded Valves, Springs, Seals
Turbos (Have)
Exhaust work
Intercooler, piping, fittings
Old 10-14-2017, 02:35 PM
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Youíre going to want at least 964 cams with that compression, but Iíd recommend 993 super sport. Thatís what I have in my 8.3:1 twin plug turbo motor.


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- 1979 930
Old 10-14-2017, 02:39 PM
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Chain fence eating turbo
 
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Since you're already going to use a Carrera 3.2 intake, you can use a plethora of TPS with a custom adapter. I'm using a mid '90's 325 TPS. All early to mid-'90's BMW's except the 318 fit the square D shaft.

2nd, the fuel rails on the 3.2 flow well enough for our motors. No need to upgrade.

I like my 80lb/875cc high-Z Siemens Deka injectors. ID1000 or bigger (if big hp E85) would be even better in idle quality. Mine idles just fine for me with the Dekas.
Old 10-14-2017, 03:36 PM
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Thank you....wasn't sure about cams as I've seen the sc's are pretty aggressive for turbo applications but I have looking at 964 too

Yes analog run gas no E85 for me but was wondering what most are running for injectors. I like the idea of 80# too much more I think idling will be a big issue on the street
Old 10-14-2017, 04:24 PM
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Chain fence eating turbo
 
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With ID injectors, idling is never an issue if your EFI system has granular enough injectot PW resolution.
Old 10-14-2017, 04:30 PM
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SCs are about as UNaggressive as you can get. Even 993SS purr like a kitten on my high compression 3.4 running CIS. With that high of static compression, youíre going to want a cam that eases up dynamic compression. Trust me, 993SS is the way to go. They only get a bad rep from those who have not used them. If I had it to do over again, Iíd even go more aggressive with GT2s.


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Old 10-14-2017, 05:00 PM
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Yeah but I'm not running high compression I'm running either 8.0:1 or 8:5:1. Which hasn't been determined yet as I'm waiting on some data
Old 10-14-2017, 05:27 PM
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8.5 is HUGE compression for an air cooled 911 turbo without knock control. Even a 993 turbo only ran 9.2:1. These cars arenít Evo Xs or STIs. You need to design the engine correctly or youíll melt something.


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Old 10-14-2017, 05:33 PM
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Yes but I'm going to be running knock control... clewitt has a great system

Last edited by xtturbox; 10-14-2017 at 05:37 PM..
Old 10-14-2017, 05:35 PM
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So am I. Just leave some margin, is all. Cam choice is critical or your dynamic compression is going to plasma cut you a paper weight.


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Old 10-14-2017, 05:38 PM
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That's what I'm working on now....Cams and compression, but should have it figured out pretty quickly plus running tech3r with full timing map control
Old 10-14-2017, 05:42 PM
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xtturbo, you sound like a Subie guy. Forester XT? I have a 22b replica motor I need to unload.


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- 1979 930
Old 10-14-2017, 05:42 PM
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Now Available for Ordering:   101 Projects For Your BMW 3 Series 1982-2000  [more info]
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Looking for as much input as possible here from people's experience. It's a **** ton on money to grenade a motor
Old 10-14-2017, 05:43 PM
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Way before that time....started with Subaru xt's in early 90's then wrx 2002 which couldn't make fast enough so built a 2006 3.2 stroked evo many moons ago
Old 10-14-2017, 05:46 PM
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Quote:
Originally Posted by xtturbox View Post
That's what I'm working on now....Cams and compression, but should have it figured out pretty quickly plus running tech3r with full timing map control


PM me RE: Tec3r. Iíve spent 2 years with a Tec3r and can share some thoughts.

And Iíve calculated every permutation possible on static to dynamic compression and cam, including boost compensation in the dynamic number.


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Old 10-14-2017, 05:46 PM
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I will gratefully take any advice you have =)
Old 10-14-2017, 05:47 PM
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I will gratefully take any advice you have =)


I'll save you a ton of time and money. I've redone everything twice.


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- 1979 930
Old 10-14-2017, 05:49 PM
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Quote:
Originally Posted by kenikh View Post
I'll save you a ton of time and money. I've redone everything twice.


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Thank you!!!!
Old 10-14-2017, 05:53 PM
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kenikh,

Did you have to fly cut valve pockets in the piston tops to use 993SS cams?
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1977 930 Slant, MS3 EFI, Carrera intake, Twin plug, Powerhaus headers, Magnaflow muffler, Garretson intercooler, GTX3071R
Old 10-15-2017, 09:13 AM
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kenikh,



Did you have to fly cut valve pockets in the piston tops to use 993SS cams?


No. JEs cleared no problem.


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- 1969 911S
- 1980 911SC Targa
- 1979 930
Old 10-15-2017, 09:32 AM
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