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Marelli dizzy replacement
Okay wiseguys! What can I substitute a Marelli distributor with on a 71 2.2T?
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Steve in South Africa If it isn't sideways, it isn't fun |
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03-07-2002, 02:23 PM
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Location: Ottawa, CANADA
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Based on the Tech Spec pocketbook, it's a Bosche # JDFR6 0231 159 008
Good luck
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Ron '96 993 C4S happy again  '03 996 gone..... No regrets  '95 993 gone.... So sad  '70 Signal Orange 911T Targa (gone but not forgotten) |
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03-07-2002, 03:19 PM
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Search for Marelli, then start crying quietly to yourself as you realise all the posts don't tell you a definitive answer.
John Forcier (Fishcop) recently had a 72/3T or 2.7 CIS dizzy (I think - #0-231-184-001) machined down slightly so it fits his '69 Marelli "hole". He is probably the best guy to ask. I think the advance curve is ok (I have been told it is). I don't know if the 71T has the right or wrong size hole already. I am fixing mine by replacing the whole engine  (edit) Or you can just buy the Bosch which fits. B.O.H.I.C.A. for a new one (and rarely available second hand). Cam
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1975 911S (in bits) 1969 911T (goes, but need fettling) 1973 BMW 2002tii (in bits, now with turbo) Last edited by CamB; 03-07-2002 at 03:27 PM.. |
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03-07-2002, 03:19 PM
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Location: Peoples Republic of Long Beach, NY
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Steve...does your hole accept the routine/later 911 dizzy??
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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03-07-2002, 04:28 PM
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"Okay wiseguys! What can I substitute a Marelli distributor with on a 71 2.2T?"
Steve, How about another Marelli? I've got one from my '69 T. Excellent condition. Advance curve should be the same/similar. Let me know if you're interested. Sherwood Lee http://members.rennlist.org/911pcars www.seinesystems.com |
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03-07-2002, 05:22 PM
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Bird. It's the word...
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Steve, as CamB mentioned I recently replaced my Marelli for a Bosch.
On the excellent advice of the esteemed John Walker (John Walker Workshop) I obtained a relatively cheap 1974 bosch dizzy. It needed a freshen up, so I rebuilt it courtesy of one of Warren's (Early S Man) instructional posts. The advance in a 2.7 S dizzy (other than the Carrera) is the same as the earlier T engine. I also purchased a new rotor cap and rotor button (rev limited to 6500). Whilst the body of the distributor was dismantled and free of obstructions, I took it to a local performance engine rebuilder and had the shaft machined to exactly match the shaft of the Marelli. There is a width difference of about 2 mm and the O ring is in a slightly different spot but this does not matter (but you must get a new O ring to match or use the old Marelli one). I then rebuilt the distributor and added a Crane XR 700 optical ignition unit and new leads. The overall improvement was incredible. Your hardest task is to track down a suitable dizzy, but trust me....you will not find an original second hand Bosch to fit! Good Luck
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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03-07-2002, 06:46 PM
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Good! I wasn't too far wrong!
I was quoted NZ$200 for a suitable dizzy - about US$80 - so it really is pretty cheap.
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1975 911S (in bits) 1969 911T (goes, but need fettling) 1973 BMW 2002tii (in bits, now with turbo) |
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03-07-2002, 07:00 PM
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Guys ... check the shank diameter on the 2.2 Marelli ... I belive the 2.0 engines used the smaller diameter. The 2.4 and 2.7 distributors use a nominal 30.00 mm bore in the crankcase, and I believe the 2.2 engines did also.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-07-2002, 07:13 PM
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Good point Warren - otherwise when you take your "new" distributor down to the machine shop they are going to look at you strangely.
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1975 911S (in bits) 1969 911T (goes, but need fettling) 1973 BMW 2002tii (in bits, now with turbo) |
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03-07-2002, 08:22 PM
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Bird. It's the word...
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Yep, maybe you'll be lucky and not have to machine the shaft. By the way...the vaccum unit that the Bosch will come with does not matter to your engine (it only retards at idle) so do not connect it.
I'm sure that if you engine is running like mine was after at least 15 to 20 years on the same rotor and button, you will really notice the difference a correctly performing ignition system makes!
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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03-07-2002, 10:06 PM
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I used a "S" dist in my "T" and am very happy with it. The Bosch number is 0231-159-006. Cost was $100 US. I set the timing for total advance. At idle/low rpm the timing is advanced with the "S" dist but I haven't noticed any problems. I think it is about 5 BTDC when the Marelli unit was 2-3 ATDC at idle.
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Craig Dinger '02 Sampson Titanium, Campagnolo 20 speed roadbike, daily commuter, 3,700 miles and counting '71 911 T Targa for fun '89 BMW 325i sedan wife' ride '83 BMW 533i White/Cardinal red leather, Wet weather commuter '89 BMW 535i auto to 5 speed conversion in progress '98 Ford F-150 weekend hauler |
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03-07-2002, 11:29 PM
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Join Date: Sep 2000
Location: Bournemouth, England
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I recently replaced the Marelli Distributor in my 69 T engine only to find out that the old one was not the problem. The cap is a little worn but bar that it's fine and works fine. So if anyone needs one or even for parts feel free to mail me.... at the moment it's sat on shelf not helping anyone !!
Alan.UK |
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03-08-2002, 01:10 AM
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1971 Porsche 911 2.2
1975, 1969 Porsche 911S, 911T 2.7S CIS, 2.0T ca
1969 Porsche 911T 2.7RS Spec with Webbers
