My EFI project

fletcher0780 · fletcher0780's Garage

Bought my 930 a year and a half ago. 87 carmine red 50,000 miles. Car had sat for a while, but had a decent history and was well cared for. It had so cool ad ons (mostly cosmetic). Fikse wheels, interior bits, B6 intercooler, 1 bar spring.

After a couple weeks of driving it was apparent the turbo seals were shot, so I called UMW and swapped on a k27-7200. As more time went by, I noticed I was burning about 1qt of oil every 800 miles (smoke only on decel), and the 3rg gear grind started getting to me.

I just pulled the engine with plan of having the trans repaired, replacing valve stem seals, adjust valves, and EFI/DIS. I'm using VEMS for my ECU, carrera manifold with rotated TB (to use 930 IC) 65 lb/hr Siemens injectors, LS2 coil near plug, clewett 60-2 crank pully, AEM boost solenoid w/ .5bar WG spring and other misc. sensors/electronics. I'm curious if turbokraft has the only carrera to 930 injector blocks out there. I'm not tearing into the engine, so I will not be porting my heads, or swapping cams. I'm aiming for a good street driver with good lowish end grunt (no need to rev past 5500 RPM's). Anyone have any suggestions or comments?

sjf911 · sjf911's Garage

Your injectors might be a bit too large for your relatively stock build which may impact idle and low load control/tuning some. Looks like a nice mix of features on the ECU at a relatively low cost. I would highly recommend you have a local tuner that has experience with and can help you with that specific system.
What about the status of your valve guides if you are having significant oil consumption issues?

proffighter · proffighter's Garage

Quote:

Originally Posted by sjf911

Your injectors might be a bit too large for your relatively stock build

That's what I think too...

Clewett does have some blocks for your needs

fletcher0780 · fletcher0780's Garage

I mis-stated my injector spec's, these are the ones I have:

Coil Resistance: 12.5 Ohms / High Impedance / High-Z (No ECM driver modifications required)
Static Flow Rate @ 43.5PSI ( 300kPa ) w/Gas: 60 lb/hr = 630 cc/min = 453 g/min
Static Flow Rate @ 87PSI ( 600kPa ) w/Gas: 85.7 lb/hr = 900 cc/min = 648 g/min
Gain: 0.11ms/mg
Offset: 0.055ms
Turn on time @ 14VDC: 1.14ms
Turn off time: 0.85ms @ 600KPa
Connector: Bosch EV1
Series: DEKA 4 ( DEKA IV )
Orifice Type: Multi-orifice
Spray Pattern: 30 Degree Spray Cone
Factory fitted with Viton upper and lower o-rings

http://www.bmotorsports.com/shop/product_info.php/products_id/448

fletcher0780 · fletcher0780's Garage

Quote:

Originally Posted by proffighter

That's what I think too...

Clewett does have some blocks for your needs

Just got off the phone with Clewett, they don't have the blocks.

proffighter · proffighter's Garage

Quote:

Originally Posted by fletcher0780

Just got off the phone with Clewett, they don't have the blocks.

That's strange. Didn't you say 930 with a Carrera manifold??? Here is what I've found on their website:

Adapters, 2 bolt intake flange for 964/993 intake manifolds, set of 6.
Stock fuel rails can be adapted or custom rails made. Call for details.

And further this:

A great upgrade for the 911 SC and 930 Turbo! Pick up a used 3.2 Carrera intake manifold
(84-89), bolt it on, and attach the fuel lines. Purchase kit # 9007-1 or # 9007-2 to complete the system. The 930 will also need a set of larger fuel injectors.

found here:

Clewett Engineering Catalog: Engine Management Systems

fletcher0780 · fletcher0780's Garage

strange, he actually made a joke about installing a carrera manifold on stock 930 heads. Those look like they'd need to be welded onto to the bottom half of the manifold. I'm looking for something more like these, it looks like they are the only manufacturer though. I just wanted to do a little comparative shopping.

willtel · 01-04-2011, 04:11 PM

Quote:

Originally Posted by proffighter

That's strange. Didn't you say 930 with a Carrera manifold??? Here is what I've found on their website:

Adapters, 2 bolt intake flange for 964/993 intake manifolds, set of 6.
Stock fuel rails can be adapted or custom rails made. Call for details.

I thought the stud spacing was different on the 993 engines?

Quote:

Originally Posted by fletcher0780

strange, he actually made a joke about installing a carrera manifold on stock 930 heads.

A joke as in it is a bad idea?

Pat Williams Racing makes some, I don't think they are cheap.

PWR-EFI-1 Components - Pat Williams Racing (porsche)

fletcher0780 · fletcher0780's Garage

Quote:

Originally Posted by willtel

I thought the stud spacing was different on the 993 engines?

A joke as in it is a bad idea?

Pat Williams Racing makes some, I don't think they are cheap.

He thought it was a bad idea to adapt a 41mm manifold to a 34mm intake port.

Those Pat Williams adapters are to EFI a 930 with the original 930 intake manifold.

gsmith660 · 01-04-2011, 05:09 PM

I put a 3.2 intake on a 2.7 motor all I had to do is a little port matching with a dremel tool and I am pleased with the outcome you say you have a manifold did you get the fuel rails that go with it? Use the phenolic spacers to help with the blending they are stock and pelican sells them for right around 9 bucks a piece I think put a 3.2 intake gasket on top of the spacer and a 930 spacer on the bottom trim to fit.

fletcher0780 · fletcher0780's Garage

Quote:

Originally Posted by gsmith660

I put a 3.2 intake on a 2.7 motor all I had to do is a little port matching with a dremel tool and I am pleased with the outcome you say you have a manifold did you get the fuel rails that go with it? Use the phenolic spacers to help with the blending they are stock and pelican sells them for right around 9 bucks a piece I think put a 3.2 intake gasket on top of the spacer and a 930 spacer on the bottom trim to fit.

is the 2.7 similar to the 3.3 as far as intake ports? I've got the complete 3.2 EFI system including spacers and fuel rails. I'll try matching them up.

gsmith660 · 01-04-2011, 05:31 PM

Quote:

Originally Posted by fletcher0780

is the 2.7 similar to the 3.3 as far as intake ports? I've got the complete 3.2 EFI system including spacers and fuel rails. I'll try matching them up.

You will need some shorter studs I went and got threaded rod from the hardware store and cut my own then put the phenolic spacer on the head and mark the places where the head is smaller than the spacer then put a towel or something in the port to stop grindings from getting into the motor and keep a vac handy and I used a dremel to blend and shape the intake port to the spacer particuarly around the injector port so you get a good pattern and then I trimmed the in my case 2.7 intake gasket to fit properly and not block the port. I think it worked pretty good for the time being.

fletcher0780 · fletcher0780's Garage

Quote:

Originally Posted by gsmith660

You will need some shorter studs I went and got threaded rod from the hardware store and cut my own then put the phenolic spacer on the head and mark the places where the head is smaller than the spacer then put a towel or something in the port to stop grindings from getting into the motor and keep a vac handy and I used a dremel to blend and shape the intake port to the spacer particuarly around the injector port so you get a good pattern and then I trimmed the in my case 2.7 intake gasket to fit properly and not block the port. I think it worked pretty good for the time being.

You ported your intake ports with the heads installed? Not sure i'd attempt that.

willtel · 01-04-2011, 05:36 PM

Quote:

Originally Posted by fletcher0780

He thought it was a bad idea to adapt a 41mm manifold to a 34mm intake port.

Those Pat Williams adapters are to EFI a 930 with the original 930 intake manifold.

I see. There is some more info in drmatera's EFI conversion thread.

EFI conversion

gsmith660 · 01-04-2011, 06:26 PM

Quote:

Originally Posted by fletcher0780

You ported your intake ports with the heads installed? Not sure i'd attempt that.

Didnt take off that much material and was real careful to not get any into the cylinder really only blended rather than ported. I think my induction setup supports way more flow than my motor can ever use.

pkracer21j · 09:53 PM

Steve!!!!
Long time no talk!!!!
glad to see your making the most of you CT winter! I hope Paul k is lending you a hand and a beer! its cold enough for me up there in the summer. haha

you could probably epoxy the injector holes shut in your stock CIS injector blocks and taper them to match the carrera manifold. epoxy all around the outside of the blocks to reinforce them if you go that route...they crack fairly easy without.

pkracer21j · 01-04-2011, 09:47 PM

on second thought, I may have a set of billet injector block blanks that don't have the injector openings bored in them yet, so techincally they're just spacers at the moment...I'll check in the morning.

fletcher0780 · fletcher0780's Garage

Hey Pete, how's it going? I'm dropping the trans off to Gary Fairbanks tomorrow and am working with Marc Swanson from EFI express (the guy with the twin turbo V8 audi coupe). The VEMS unit has some really cool features out of the box, launch control, selectable maps (vallet mode), boost control, EGT, digital display, sd card for data log.

Let me know what you find and if you want to part with them. Are you doing your EFI project this year?

pkracer21j · 01-05-2011, 05:43 AM

I was going to, and I have the entire efi setup sitting in a box in my garage, but my yellow car dyno'd in at 396 at the hubs on .7 bar and is running so well right now I'm following the "if it ain't broke" route for the time being. I'll get back with you on the blocks today, should be back at the house early this afternoon.

krasuskyp · krasuskyp's Garage

Hey ladies!

Steve - you nut. Good for you! That's a great project, love to check it out sometime over a cold one or 3 - 860.490.9808 if you ever need mocking and generally disparaging remarks provided (I'm good for something).

Awesome about Marc Swanson - as I read your VEMS mention I was about to reply that you contact him as he's quite talented (brilliant!), but then see you're locked on and tracking already. NOICE. Tell him I said hey. Did you get to check out his 90CQV8tt at all? That thing is astoundingly stoopidfast, and makes incredulous sounds. Good stuff.

Good luck w/ the progress, ring me anytime.

ps. dig the Jeep storage unit 8-)