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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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 Posted: Thu Dec 10, 2009 1:52 pm Post subject: Completed Autocad Drawings |
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924 NA Intake Flange, next I will be drawing up a 931 S2 intake flange.
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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!tom
Joined: 28 Aug 2006
Posts: 1941
Location: Victoria, BC Canada
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| Posted: Thu Dec 10, 2009 4:26 pm Post subject: |
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Nice!
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78 924 NA
5-lug |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Thu Dec 10, 2009 9:05 pm Post subject: |
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Min, very very nice work! Nice of you to share as well. Is there a source file that is available as well?
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erstwhile owner of just about every 924 variant ever made |
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gegge
Joined: 27 Jul 2007
Posts: 1124
Location: Sweden
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| Posted: Thu Dec 10, 2009 11:04 pm Post subject: |
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Your work is much appreciated!
I bought a carb intake instead of making the flange. But if you make a 931 it does increase the possiblities to make a customize intake 
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Carl Fredrik Torkildsen
924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Fri Dec 11, 2009 12:34 am Post subject: |
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| ideola wrote: | | Is there a source file that is available as well? |
I have the source file, but I haven't decided what I'm doing with it yet. I may have some of these CNC machined out. If I decide I don't want to do anything with it, I'll post it up.
I'll be posting a few other pieces as I finish them, 931 intake is next, 924 NA exhaust will be after that. I've got a few turbo flanges that people may want also. I'd do a 931 exhaust, but I don't have a manifold or head to model off of.
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Fri Dec 11, 2009 3:51 am Post subject: |
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There should be a few cracked S1 exhaust manifolds floating around this board somewhere  if I had one, I'd send it to you.
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erstwhile owner of just about every 924 variant ever made |
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924RACR
Joined: 29 Jul 2001
Posts: 9075
Location: Royal Oak, MI, USA
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| Posted: Fri Dec 11, 2009 5:41 am Post subject: |
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Hmm, I wonder if I have a cracked S2 mani sitting around in storage. Will try to remember to check, planning to be there Saturday...
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Vaughan Scott
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'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Fri Dec 11, 2009 11:17 am Post subject: |
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Here you go flosho, as promised
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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RC
Joined: 25 Mar 2007
Posts: 2637
Location: Australia
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| Posted: Fri Dec 11, 2009 6:47 pm Post subject: |
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Nice drawing Min.
Are you confident the dimensions are accurate?
As you don`t have a 931 head presume that is taken from the manifold? Looks like a few mm of port mismatch to the head. |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Sat Dec 12, 2009 12:29 am Post subject: |
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| RC wrote: | | Are you confident the dimensions are accurate? |
I knew someone was going to ask that eventually. ya, I'm confident the dimensions are good. At least for the important ones (the holes). When I was drawing it up, I was printing it out on a transparent sheet of thin plastic and laying it over the flange I was modeling to ensure its accuracy.
I'll take a picture of the transparency laid over the ports so you guys can see, how closely things match up (very close). You say there is some port mismatch to the head? Have you verified that? How did you measure it?
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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RC
Joined: 25 Mar 2007
Posts: 2637
Location: Australia
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| Posted: Sat Dec 12, 2009 7:03 am Post subject: |
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| Min wrote: | | RC wrote: | | Are you confident the dimensions are accurate? |
I knew someone was going to ask that eventually. ya, I'm confident the dimensions are good. At least for the important ones (the holes). |
Measuring the head places the upper & lower holes at 95mm centres. Haven`t measured the offset but either the 45 or 51 must be out.
| Min wrote: | | You say there is some port mismatch to the head? Have you verified that? How did you measure it?Min |
There is indeed some port mismatch, established by measuring an actual head with digital calipers. Although the ports are tapered internally, measuring at the face of all 4 ports gives a width of 36mm and a nominal height of 37mm. All ports were under 38mm.
Perhaps others with a 931 head can give you their dimensions or even a head to model from. Clearly if one is making a replacement manifold (flange) it must ideally match the head face, not the old stock manifold. |
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!tom
Joined: 28 Aug 2006
Posts: 1941
Location: Victoria, BC Canada
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| Posted: Sat Dec 12, 2009 8:38 am Post subject: |
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To be fair, the tolerances on the drawing do say +- 1 mm for those measurements.
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78 924 NA
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Sat Dec 12, 2009 8:40 am Post subject: |
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Someone should punch these into http://www.emachineshop.com site and see what the price for a few of these is..
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RC
Joined: 25 Mar 2007
Posts: 2637
Location: Australia
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| Posted: Sat Dec 12, 2009 9:38 am Post subject: |
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| !tom wrote: | | To be fair, the tolerances on the drawing do say +- 1 mm for those measurements. |
So it`s way out of tolerance then, is`nt it?
The stud hole centres on the first port are off by 1mm but the accumulated dimensional error from the datum means the last hole is out by 4mm.
Although the ports may be accurate for a stock manifold they are at least 2mm larger in height than the head. Quite likely that the Y dimension for the port centres is also incorrect.
I`m not knocking Min`s work, rather merely highlighting the dimensional discrepancies and the variation between manifold and head.
Sure that Min would be pissed off if he had some machined as it stands. Or same if you, flosho or anyone copied the drawing and found it didn`t fit. Lots of filing to do.
If Min does do a run of these I would like one myself, providing it lines up with the holes and ports.
BTW, since emachineshop uses their own software it may not be compatible. |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Sat Dec 12, 2009 10:49 am Post subject: |
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Well, that's fine I guess, I'll just take these down until I can verify that they are indeed correct.
Min
_________________
Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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