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one of the great unwashed
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,870
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Considering EFI swap
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Patrick E. Keefe 78 SC 01 Boxster |
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I have not done it myself, but have been partly down that path, and researched accordingly, what you suggest is a valid option. However, I don't remember if you have the alu plenum for your CIS. If you do, I believe you might as well stick with that, making it even easier. I would personally use MS, but there are lots of options, also on a budget.
Edit: no matter what plenum you have, it seems to be ok for boost, so my comment on the alu plenum is nonsense. You should just be able to use what you have a la tbitz.
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Jesper Carrera 3.0 1975 930 1978 OEM Matte Schwartz, ANDIAL IC, BL WUR, SC cams. LMA-3 w. XD-16 and CP transducer www.stauningwhisky.dk Last edited by jsveb; 06-04-2014 at 04:24 PM.. |
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MS2 with EDIS ignition running wasted spark would be my recommendation. The EDIS really simplifies the setup as it's almost bullet proof and basically self contained. The EDIS parts are easy to get at the junk yard and very cheap. I would recommend Clewett for a crank pulley, 36-1 toothed wheel, and sensor bracket although GSF is an alternative.
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Steve Sapere aude 1983 3.4L 911SC turbo. Sold |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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^^^ this.
Don't be fooled by other EFI makes, the surface mount components inside MegaSquirt are the same quality as say Motec. Why pay more? |
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Turbo Hooligan
Join Date: Sep 2007
Location: Greensboro NC
Posts: 1,246
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We've done the MS2 with EDIS, and MS3 with COP. after building harnesses for both and using both I'd recommend MS3 with COP. Its a much better system for not much more money.
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www.d-zug.com blog.d-zug.com All these guys do is drive too fast, work on cars, chase ******* and drink.. really no fun at all... |
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Registered User
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,547
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You won't regret it!
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Chris Carroll TurboKraft, Inc. Tel. 480.969.0911 email: info@turbokraft.com http://www.facebook.com/TurboKraft - http://www.instagram.com/TurboKraft |
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Join Date: Oct 2012
Location: Peoria, Arizona and Big Rock, IL
Posts: 213
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07 911 Turbo - Pilot Sport Cup 2 ZP 96 Carrera 4 - Bridgestone RE050A 73 911E - Hoosier R6 + twin 75's 92 Corvette - Nitto NT01 14 BMW X3 - Pilot Sport A/S 3+ |
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Registered User
Join Date: Nov 2007
Location: New Jersey
Posts: 2,417
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Definitely choose a system that you can either tune yourself or have someone local do the tuning. Many to choose from..happy hunting..
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Rey....77 930 "the Mistress" |
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one of the great unwashed
Join Date: Apr 2004
Location: Ringwood, NJ
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Quote:
Here is an older configuration: ![]()
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Patrick E. Keefe 78 SC 01 Boxster |
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I've noticed a few 3.2 manifolds for sale relatively cheap with TB and fuel rails. I would think 930 pancake manifolds should be less but converting them to EFI could be more expensive as you have to source spacers, fuel rails, etc.. One recommendation from my experience, if you elect to go simple with MS2/EDIS, I would go ahead and wire everything for sequential. You can still run batch fire fuel and wasted spark. That wasn't on my radar when I did my original build so when I converted to MS3 I had to completely rework the entire wiring harness.
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Steve Sapere aude 1983 3.4L 911SC turbo. Sold |
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one of the great unwashed
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,870
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Thanks, Steve
I'm am definitely leaning towards a 3.2 setup, because it seems the simplest route. I've been reading your threads on your conversion with interest. I've gotten to the point that I want to put this tub together one last time, and then just be able to drive it, so I want to try and get it close to right. My immediate concern is getting a reliable signal from the crank somehow.
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Patrick E. Keefe 78 SC 01 Boxster |
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A little pricey (especially compared to EDIS), but if you want sequential, Clewett crank pulley, 60-2 wheel, and sensor. I had little trouble getting sync, no resistors, very little adjustment of the main board POTs. His cam sensor is flawless as well, although with a little effort, a 930 scavenge pump with air pump pulley can be made to work handily.
I admire your desire for a final build, I can't seem to stop tinkering.
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Steve Sapere aude 1983 3.4L 911SC turbo. Sold |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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^^^ you've forgotten more than I know.
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Thanks Pat,
I would actually stay with the plenum and runners you've got. Others correct me if I am wrong, but the SC type plenum and runners are actually good for flow and responsiveness. This is how simple your left bank would be if ridding the WUR and other CIS components. All that woul be left is the charge pipe to the TB. sorry for the mess. Some day this will go on my Carrera 3.0 ![]() This is not mine, but is shows how clean it can be done, I bet it would be fine in blue as well ![]() ![]()
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Jesper Carrera 3.0 1975 930 1978 OEM Matte Schwartz, ANDIAL IC, BL WUR, SC cams. LMA-3 w. XD-16 and CP transducer www.stauningwhisky.dk |
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Crotchety Old Bastard
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I've seen a few Haltech powered 3.0L engines that look just like the one Jesper posted. Very clean setup.
+100 on doing the install and tune yourself. You know what you have and how it works.
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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 |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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It was something I was forced to do but I'm so glad I learned it. I mean, you never stop learning, but you understand enough to make it happen.
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one of the great unwashed
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,870
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I'm really starting to like Jesper's idea with the SC setup. I do have a spare airbox I can cut up.
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Patrick E. Keefe 78 SC 01 Boxster |
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one of the great unwashed
Join Date: Apr 2004
Location: Ringwood, NJ
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Correct me if I'm wrong, but are the MS systems non-sequential, up to the MS3X or whatever it is? In essence, a MS system is pretty much like a 3.2 system...squirts one cylinder bank, then the other?
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Patrick E. Keefe 78 SC 01 Boxster |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
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You can inject up to 3 times a revolution, so if you alternate bank injection, you can almost have sequential.
So for MSII, kinda batch/bank, kinda sequential. |
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one of the great unwashed
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,870
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Thanks, Tippy
I will assume that the MS variants up to MS3 are then fairly suitable for street/some track/low boost applications such as mine, where absolute HP is not the objective. And, the non-sequential injection will not need cam sensor?
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Patrick E. Keefe 78 SC 01 Boxster |
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