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RC
Joined: 25 Mar 2007
Posts: 2637
Location: Australia
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 Posted: Sat Aug 09, 2008 1:53 am Post subject: |
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| ideola wrote: | | Maybe you / we can find you a SI 931 intake? They should be dime-a-dozen... |
Sure. They`re as common here as koalas in gumtrees are in the USA. 
Actually a 931 S2 manifold will be much better for this application as it has the large (58mm IIRC) round hole and square bolt pattern. Then you won`t need the adapter and have sufficient room for a bend. Its not a bolt on since the stud hole spacing is different and I understand the ports don`t exactly match. So it requires some port work and drilling/milling of holes. Runner length is no problem and will actually improve torque slightly through the usable midrange.
How thick is that adapter Gav?
Maybe it`s possible to mill the manifold face at an angle to incline the TB so that a bend will fit over the fuel rail. Hood clearance is a big issue but the TB can be rotated (90*) to its lowest edge, that may just fit?
Or of course you can imitate my manifold, hacking out the TB mount area and weld in a larger Aluminium flange, recessed deeper in for additional clearance. Then the TB can be bolted direct, obviously gaining the thickness of the adapter.
Something to think about over the week end. |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Sat Aug 09, 2008 2:15 am Post subject: |
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Unfortunately, the bolt pattern is much smaller on the Weber than the SII manifold, already checked that. You'd have to have an adapter plate either way, although it could be much smaller with the SII mani. The adapter plate is about 1" thick (from memory) and it is designed to create a smooth transition between the round bore of the TB and the lopsided ovoid audi-style opening on the manifold. Shaving it might muck with the airflow, but I suppose anything is possible...
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erstwhile owner of just about every 924 variant ever made |
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emoore924
Joined: 13 Apr 2004
Posts: 2822
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| Posted: Sat Aug 09, 2008 11:36 am Post subject: |
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| I have an adapter plate... |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Sat Aug 09, 2008 11:49 am Post subject: |
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| emoore924 wrote: | | I have an adapter plate... |
You have a Weber-to-SII adapter plate???
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erstwhile owner of just about every 924 variant ever made |
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RC
Joined: 25 Mar 2007
Posts: 2637
Location: Australia
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| Posted: Sat Aug 09, 2008 1:51 pm Post subject: |
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| ideola wrote: | | emoore924 wrote: | | I have an adapter plate... |
You have a Weber-to-SII adapter plate??? |
Should be a piece of cake to make one from 3/8 or 1/2" ally if its not possible to simply drill and tap 4 holes in the manifold.  |
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emoore924
Joined: 13 Apr 2004
Posts: 2822
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| Posted: Tue Aug 12, 2008 1:07 pm Post subject: |
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| Quote: | | You have a Weber-to-SII adapter plate??? |
Heh heh. You know how this works. I have one of everything for this car and if you want pickies, please PM.  |
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emoore924
Joined: 13 Apr 2004
Posts: 2822
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| Posted: Wed Aug 13, 2008 1:49 pm Post subject: |
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Ok, I checked and I have a series I adapter. It is egg-shaped, not round.
Mea culpa  |
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pocketscience
Joined: 23 Apr 2006
Posts: 1650
Location: Sydney, Australia... mate!
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| Posted: Wed Aug 13, 2008 5:04 pm Post subject: |
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I'm looking into a different option now maybe...
Anyone wanna buy a Weber and adaptor plate...
G.
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Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911 |
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Chrenan
Joined: 15 Jan 2003
Posts: 3903
Location: Canada
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| Posted: Wed Aug 13, 2008 11:56 pm Post subject: |
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Put it on EBay, I got close to $200 for mine when I sold it. Some guy in Denmark must have really wanted it. It almost completely paid for the parts car I pulled it off.
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1987 951 - M193 Version for Japan |
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