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Alan L's Avatar
 
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cylinder/head studs

Does the 930 only use Dilavar. There seem to no steel options listed in Pelican parts for the 930 - presumably 911 ones won't work. Found one weird stud in my engine during dissasembly. It is solid steel from the Allen head to the stud. Screws out of the case rather than the Allen head. All the rest are Dilavar. Wondering what I should be replacing it with.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 07-17-2011, 12:26 PM
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My personal car is 993 dilivars built in 1995 but the price has gone so exorbinate it almost the cost of the build to install them.
The last turbo I built was with steel, regular 911 studs and there has been no problems.
I do like the idea of fine thread on the head side to more properly torque the studs. I personally have never inquired into the parts though.
Bruce
Old 07-17-2011, 03:26 PM
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I just installed a set of Raceware studs on my 1986 930 so they should be available for your car. I have used them before for track cars without any problems. The solid stud sounds very strange, never heard of that.
Old 07-17-2011, 04:00 PM
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Are the Raceware ones steel or Dilavar?
When I did my SC engine I threw out all the Dilavar and replaced with steel.
Are Dilavar considered superior to steel for the 930 (hard to figure why)
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 07-17-2011, 04:11 PM
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Years ago, I replaced dilivar with dilivar because I always felt, they lasted 20 years, you got your moneys worth, just put them in again and go another 20.
Then computers came out and places like Rennlist and PP, there was other people to talk to. Then I went to steel about 10 years ago and havent had a broken stud on any engine I built in that time.
The biggest lesson learned was you cant retorque on dilivar, learned that in the late 80s when I got back on an engine and had half the studs laying on the floor after I torqued them and that was SC engines.
Bruce
Old 07-17-2011, 04:43 PM
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930 uses dlivar on top and steel on the bottom... I thought. You can purchase nice steel set from Walt at Competition Engineering in Lake Isabella, CA... Super guy and does a ton of Porsche work. He has these made for him and they are just like ARP but less exspensive... and he states better which he can tell you why. I have forgot.

Best of luck,
Bryan
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1987 930, 1975 914 2.0, 1989 944 Turbo S, 1991 964 Targa, 2004 996TT Convertible, 550-6 Spyder with a 2.4 liter twin plug "S-spec'd motor"

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Old 07-17-2011, 04:48 PM
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Hmm, mine has Dilavar all thru - is that uncommon.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 07-17-2011, 05:53 PM
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I guess Raceware uses an alloy that they are not willing to share (unless somebody here knows). I have also heard good things about ARP but never used them. I believe all are in the $500 to $600 range.
Old 07-17-2011, 06:08 PM
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Alan, you may be correct. I know that I changed them all to Steel from Walt when I rebuilt my motor... none of mine were broken but the added insurance was worth it. I think his were around $350.. It has been almost 2 years since rebuilding my motor.
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Previous cars:
1987 930, 1975 914 2.0, 1989 944 Turbo S, 1991 964 Targa, 2004 996TT Convertible, 550-6 Spyder with a 2.4 liter twin plug "S-spec'd motor"

Current cars: 2006 Cayenne TTS, 1991 964 Cabrio, 1997 993TT, 1984 Jeep Grand Wagoneer
Old 07-17-2011, 08:21 PM
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Are they the same studs as for 911s?
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 07-17-2011, 09:15 PM
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Quote:
Originally Posted by x98boardwell View Post
930 uses dlivar on top and steel on the bottom... I thought.
This is not correct - all the turbo engines used Dilivar studs top and bottom.
Old 07-18-2011, 07:26 AM
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I knew it sounded wrong.. thanks for clarifying.
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Previous cars:
1987 930, 1975 914 2.0, 1989 944 Turbo S, 1991 964 Targa, 2004 996TT Convertible, 550-6 Spyder with a 2.4 liter twin plug "S-spec'd motor"

Current cars: 2006 Cayenne TTS, 1991 964 Cabrio, 1997 993TT, 1984 Jeep Grand Wagoneer
Old 07-18-2011, 10:16 AM
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