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Porsche Crest European Fuel Injection Delivery System

Hello All,

I am new to the forum. I recently purchased a 1986 930 with 48000 miles and in cherry condition. It was imported to the U.S. in 1986 and modified with RUF parts to a RUF (sort of) Slant Nose Turbo. The only performance upgrades were the Euro fuel system, variable boost controller in the cockpit, and the RUF duel exhaust. He did not do the transmission, the 3.4liter upgrade or the RUF Inter-cooler which is why I say "sort of"..


I would like to do an EBC, a bigger IC, and a K-27 at some point.

So my question is, what is different about the European Fuel Injection Delivery System over stock? I think it is still the K-Jetronic system but I do not know. After I put some miles on it I will take it to Brumos and see if they can figure out what it is but I thought that I would ask the forum.



Last edited by 1986 930; 05-11-2011 at 08:30 AM.. Reason: change pic
Old 05-11-2011, 08:28 AM
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Very nice car.

I bet there's a whole bunch of guys right here on this forum, that can more than answer your questions. I believe one of the differences on the fuel system is the fuel head (FH). Alot of people have the US FH modified as (part of) a performance upgrade.

I believe it is still Bosch K-jet. CIS, but with different specs.

Some think the Manual boost control is nice. So if you want to sell it you might collect some of the money needed for the upgrades your mention.

Good luck
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Carrera 3.0 1975
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Last edited by jsveb; 05-11-2011 at 05:18 PM.. Reason: spelling - again...
Old 05-11-2011, 10:36 AM
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Nice!
Yes the "Euro" system has a black steel fuel head and all the parts are built to flow a bit more fuel that the later "US" system. These terms are a misnomer as the Euro system was on all 930 cars to 1985. The US system appeared on smog engines from '86-89 with an aluminum fuel head fitted with lambda system and frequency valve.
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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
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Old 05-11-2011, 12:10 PM
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Very nice car!!
Not to highjack but Brian, do you mean that the euro system did not have lambda or a frequency valve?
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1985 Black 930, K27 7006, Garretson Intercooler, Adj boost, TB: 23 - 31mm, bielstein sport shocks, ER polybronze bushings front and rear, ER monoball joints front and rear with offset camber plates, 935 X triangulated strut brace, raised spindles, racing bump steer kit
1981 Black 911sc (sold)
Old 05-11-2011, 12:38 PM
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The boost is another question mark I have. I seem to only get around .5 Bar with the Boost dialed out and .7 Bar with it dialed in. I either have a less than stock spring or my waste-gate is leaking. I figure that dialed out it should be a factory .8Bar and dialed in it should probably go over 1.0 Bar. Based on what I have read, close to 1.0 Bar might not be a good idea with a stock IC. Does the extra fuel from the fuel system mitigate that threat?

What amazes me that even with .7 BAR, it is a pretty good quick ride to speed.

Last edited by 1986 930; 05-11-2011 at 01:28 PM.. Reason: sp
Old 05-11-2011, 01:19 PM
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Never trust the stock boost gauge. A lot of them are inaccurate.

I believe the difference between the Euro fuel head and the US fuel head (besides the colour) is the US had a frequency valve. I don't recall anyone having a Euro head with a frequency valve but I could be wrong.

Yes IMO you want a better intercooler and have your AFRs dialed in just right to safely run 1.0bar.

Now sell me those wheels!~!! She looks beautiful.
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Old 05-11-2011, 04:33 PM
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Quote:
Originally Posted by Helmsy View Post
Never trust the stock boost gauge. A lot of them are inaccurate.
This little beast has the RUF Boost gauge that replaces the clock. I have been told they are pretty accurate. It would be great if it were wrong though!!. One less thing to deal with.

Those wheels are the only after market wheels I like over the Fuchs. They make it really stand out.
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1986 930 Ultra-Smith RUF Slant Nose conversion, RUF VB, K-27 HF-S, B&B Headers and Exhaust, RUF Short Shifter, RUF Interior
Old 05-11-2011, 05:23 PM
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I agree with the boost gauge. I had one put in the clock position and will never trust the stock ones again.

Could be a boost leak or wastegate issue. I thought with a boost controller you could only go up from the spring ie 0.5 bar spring gets you up to 0.7? I could and probably am wrong tho.
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Old 05-11-2011, 07:48 PM
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Crotchety Old Bastard
 
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Quote:
Not to highjack but Brian, do you mean that the euro system did not have lambda or a frequency valve?
That is correct.

Concerning the boost settings, the original "boost controller" on some of the early tuner street cars was a valet safety device that lowered boost when switched on and then back to stock boost settings when switched off. Could this be what you have?
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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 05-11-2011, 07:49 PM
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I have a 85 Euro. I seen alot of topic on the fuel pump relay 1 and 2 in the front compartment. When I was trouble shooting on fuel issues eatlier, there is no fuel pump relays 1 & 2 in the front even though there is listed on the relays cover. It is just empty. I found only 1 fuel pump relay at the left side of the engine compartment. I don't know if this was standard for the Euro model or it's been modified by the previous owner.
Old 05-12-2011, 03:09 AM
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Definitely modified, all i've seen here in Europe have them in the front

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Old 05-12-2011, 03:25 AM
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