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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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 Posted: Tue Apr 18, 2017 6:06 am Post subject: 4-lug to 5-lug |
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I need some informations about this conversion, if I use 931 as donor car it's enough to buy disks and calipers?
Or it's necessary to replace even front and rear hub?
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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924RACR
Joined: 29 Jul 2001
Posts: 9128
Location: Royal Oak, MI, USA
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| Posted: Tue Apr 18, 2017 7:32 am Post subject: |
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Yes, you'll need the hubs front and rear...
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Vaughan Scott
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hdrider19
Joined: 03 May 2016
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Location: Catawissa Missouri(40 mi sw of St Louis)
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Tue Apr 18, 2017 6:59 pm Post subject: |
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I think this parts are necessary from 944, from 931 I think hub was the same of 924 na.
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Porsche 924 2.0 na 125hp (1979) euro
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924RACR
Joined: 29 Jul 2001
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Location: Royal Oak, MI, USA
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| Posted: Tue Apr 18, 2017 9:48 pm Post subject: |
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Yes and no. Yes, if you just buy the 944 parts, that's most of what you need.
The correct distinction is not 931 vs 924 vs 944 hub, but 4-lug vs. 5-lug hub. 931s came with both - M471 aka 5-lug was an option on both NA and Turbo 924.
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Vaughan Scott
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Tue Apr 18, 2017 10:15 pm Post subject: |
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Then I need minimum of parts showed in the link?
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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924RACR
Joined: 29 Jul 2001
Posts: 9128
Location: Royal Oak, MI, USA
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| Posted: Tue Apr 18, 2017 11:51 pm Post subject: |
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Do read through the thread; as Rasta noted, it's not actually necessary to change the rear trailing arms, just to replace the drum backing plate (the stamped steel plate that the drum brake components mount onto) with the aluminum caliper mounting plate for the 5-lug setup (which both mounts the caliper to the trailing arm, and mounts the components for the drum parking brake).
Not swapping the trailing arm will save you a lot of work... 
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Vaughan Scott
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'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Wed Apr 19, 2017 1:23 am Post subject: |
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Then I have not to replace hubs?
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Porsche 924 2.0 na 125hp (1979) euro
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ideola
Joined: 01 Oct 2004
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Location: Spring Lake MI
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Rasta Monsta
Joined: 12 Jul 2006
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| Posted: Wed Apr 19, 2017 1:35 pm Post subject: |
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Too much trouble.
Would rather ask.
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Wed Apr 19, 2017 3:34 pm Post subject: |
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I read many times this thread, but this conversion is from 944, I don't understand if conversion from 931 need even replacing hubs or they are the same of na.
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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924-76
Joined: 05 Jun 2006
Posts: 1489
Location: Ontario, Canada
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| Posted: Wed Apr 19, 2017 9:14 pm Post subject: |
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| chris79 wrote: | | I read many times this thread, but this conversion is from 944, I don't understand if conversion from 931 need even replacing hubs or they are the same of na. |
You should read it again because all your questions ask in the tread are answer there.
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1980 931S
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924RACR
Joined: 29 Jul 2001
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Location: Royal Oak, MI, USA
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| Posted: Thu Apr 20, 2017 6:24 am Post subject: |
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Of course, I could understand some reluctance to read the whole thing, every bloody word... given English as a second language...
Sometimes it's helpful to ask, if you think your question isn't answered, even if it is... may just not be easy to understand...
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Vaughan Scott
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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| Posted: Thu Apr 20, 2017 6:28 am Post subject: |
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In Europe 931 and 944NA brakes are identical, so are the hubs and suspension...with one small difference...the 944 does not have that hole trough the spindle for the speedometer to work.
Why not buy a 931 or a 944..?
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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| Posted: Thu Apr 20, 2017 6:33 am Post subject: |
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| morghen wrote: | | Why not buy a 944..? |
Exactly.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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Then www.924board.org/viewtopic.php?t=31252 |
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