914-6 Air Cleaner, Different than a 911? |
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914-6 Air Cleaner, Different than a 911? |
GeorgeRud |
Jan 23 2017, 11:26 AM
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#1
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
I was recently asked whether the 914-6 had a different air cleaner housing from the 911 of similar vintage. I had always heard that it was unique in being flatter on top to clear the engine lid. Upon checking the PET, I saw it does have a 911. part number, so I now wonder if I was mistaken. Any gurus out here know for sure?
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mepstein |
Jan 23 2017, 12:04 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,271 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I thought it was plastic vs metal.
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db9146 |
Jan 23 2017, 01:16 PM
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#3
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Senior Member Group: Members Posts: 953 Joined: 21-December 04 From: Atlanta, GA Member No.: 3,315 Region Association: None |
For the same early '70s 911 engines, there are identical and metal but I've found that the later 911 ones are plastic, I believe.
The MFI ones are different, are all plastic, and won't work with carbs. These do not have the metal clips. |
RARE 6 |
Jan 23 2017, 01:30 PM
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#4
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Member Group: Members Posts: 141 Joined: 18-January 15 From: Grand Junction CO Member No.: 18,337 Region Association: Rocky Mountains |
The OEM air cleaner housing on the -6 I bought brand new is plastic, not metal. Believe there may be a difference in the intake horn that mounts to the main housing.
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db9146 |
Jan 23 2017, 01:35 PM
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#5
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Senior Member Group: Members Posts: 953 Joined: 21-December 04 From: Atlanta, GA Member No.: 3,315 Region Association: None |
That's interesting....mine is metal (housing, carb bases, attaching ring for the snorkel) but with a plastic snorkel and mine is original.
I'll snap a couple of pics and post tonight in case it helps any one. |
Mike Fitton |
Jan 23 2017, 02:40 PM
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#6
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Senior Member Group: Members Posts: 609 Joined: 13-May 11 From: Chicago Area Member No.: 13,069 Region Association: Upper MidWest |
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mountainroads |
Jan 23 2017, 02:50 PM
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#7
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Member Group: Members Posts: 210 Joined: 19-February 12 From: Seattle Member No.: 14,145 Region Association: Pacific Northwest |
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mb911 |
Jan 23 2017, 03:13 PM
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#8
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914 Guru Group: Members Posts: 6,850 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
The MFI ones are different, are all plastic, and won't work with carbs. These do not have the metal clips. Sorry. Not true. The early (1969-1972) 911 MFI air boxes were all metal. I'm not sure about 1973 MFI. I believe the 1973+ 2.7 Carrera RS was plastic. - MR Mine is plastic and think it looks just like gms has posted on the above thread as being original |
mountainroads |
Jan 23 2017, 03:27 PM
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#9
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Member Group: Members Posts: 210 Joined: 19-February 12 From: Seattle Member No.: 14,145 Region Association: Pacific Northwest |
The MFI ones are different, are all plastic, and won't work with carbs. These do not have the metal clips. Sorry. Not true. The early (1969-1972) 911 MFI air boxes were all metal. I'm not sure about 1973 MFI. I believe the 1973+ 2.7 Carrera RS was plastic. - MR Mine is plastic and think it looks just like gms has posted on the above thread as being original We're only talking 911 air boxes, right? (It was a revelation to me that 914-6 air boxes were originally plastic, as I bought a 1970 914-6 in 1977 that had a metal air box and I assumed it was original.) That said, I've owned a couple of pre-73 911s including a 1971 E, and they all had metal air boxes. So did every other pre-73 that I can remember looking at. I'd be very interested to learn if I'm wrong. - MR |
johnhora |
Jan 23 2017, 04:55 PM
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#10
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
The stock 914-6 air cleaner is plastic.
Has a plastic snorkel that points in the opposite direction as the 911 version...both point to the passenger side. 914-6 has the holes in the plastic for the weber vent tubes. The bases attached to the carbs are metal like the 911 ones. I know I have some pics of both somewhere...searching>>>> |
Randal |
Jan 23 2017, 05:23 PM
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#11
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
I modified a 911 metal "silencer" to use at Laguna for sound control. I was getting busted going by the sound tower because the throttle bodies air flow was crazy LOUD.
Never got to use it, but I think the guy I sold it to ("Koozy") build a nice race engine and felt this assembly did help, especially with the turbo bellmouth. http://www.914world.com/bbs2/index.php?sho...amp;hl=Silencer |
maxwelj |
Jan 24 2017, 12:13 PM
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#12
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rebuilt member Group: Benefactors Posts: 278 Joined: 8-January 04 From: Owasso, OK Member No.: 1,532 Region Association: None |
A little late to the party, but I bought mine (1088) new as well, and the box is plastic. As others said, the carb tops are metal and the air cleaner ring is metal, but the snorkel and bo
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SixerJ |
Jan 25 2017, 02:04 PM
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#13
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Member Group: Members Posts: 448 Joined: 24-June 13 From: UK Member No.: 16,042 Region Association: England |
The MFI ones are different, are all plastic, and won't work with carbs. These do not have the metal clips. Sorry. Not true. The early (1969-1972) 911 MFI air boxes were all metal. I'm not sure about 1973 MFI. I believe the 1973+ 2.7 Carrera RS was plastic. - MR Mine is plastic and think it looks just like gms has posted on the above thread as being original We're only talking 911 air boxes, right? (It was a revelation to me that 914-6 air boxes were originally plastic, as I bought a 1970 914-6 in 1977 that had a metal air box and I assumed it was original.) That said, I've owned a couple of pre-73 911s including a 1971 E, and they all had metal air boxes. So did every other pre-73 that I can remember looking at. I'd be very interested to learn if I'm wrong. - MR Respectfully disagree when it comes to MFI cars. My un-mollested numbers matching 72 911S MFI has all plastic box, as does my spare 73 MFI E engine. The -6 is so modified and abused it could have had anything fitted. The box has been lost a long time ago, so a defer to higher authorities on correct -6 airboxes. At the moment it has zip loc bags on the intakes which is an improvement on what it had when I bought the car....which was nada |
IronHillRestorations |
Jan 27 2017, 08:23 AM
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#14
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I. I. R. C. Group: Members Posts: 6,717 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
I'd defer to GMS as the expert on this, but to the best of my knowledge the 914-6 had plastic air filter housings, which as stated here is flatter across the top. Later MFI 911's also had a plastic air filter housing, but I don't know for certain if this is the same part as the 914-6, not sure on the dates used though.
914-6's and MFI cars did have what I call the "fire starter cold start system", which involved spraying gas down the intakes via a tubes in the air filter housing. These were disabled through a recall. Risk aside this set up is helpful starting a MFI car in cold weather. The metal air filter housings can be made to fit, but most I've seen require some clearancing to fit, as they rub the engine lid. I'd be willing to bet if you inspected the engine lid, or the air filter housing something has been modified a little. |
Mark Henry |
Jan 27 2017, 08:44 AM
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#15
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Too me this sounds a lot like the old VW trick of using up stock on hand and both plastic or metal could have been correct.
There are oval window bugs out there with split window dashes and this sort thing happens all through the aircooled years. I'm working on a 68 ghia autostick, late build date and it has some wiring components from a '69-. I had to look at two factory wiring diagrams to figure it out. |
gereed75 |
Jan 27 2017, 09:35 AM
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#16
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Senior Member Group: Members Posts: 1,246 Joined: 19-March 13 From: Pittsburgh PA Member No.: 15,674 Region Association: North East States |
Pictures below show two boxes. The one with the snorkel is to my knowledge a correct 6 box. The one without a snorkel is to my knowledge a correct 911 box. I have the snorkel for that box, it faces the same way but has the "Y" at the end for a hot air return. Exactly what year this 911 box came on I am not sure. My understanding is it was a "latter" 911. Note though that it has the exact same squirter set up as the 914 box and also has holes for the Weber vents.
They look identical in all ways. I measured the height and they are identical. There is no part number marking on either anywhere that I could find. Same same (IMG:style_emoticons/default/smile.gif) |
mountainroads |
Jan 27 2017, 09:48 AM
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#17
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Member Group: Members Posts: 210 Joined: 19-February 12 From: Seattle Member No.: 14,145 Region Association: Pacific Northwest |
Respectfully disagree when it comes to MFI cars. My un-mollested numbers matching 72 911S MFI has all plastic box, as does my spare 73 MFI E engine. The -6 is so modified and abused it could have had anything fitted. The box has been lost a long time ago, so a defer to higher authorities on correct -6 airboxes. At the moment it has zip loc bags on the intakes which is an improvement on what it had when I bought the car....which was nada Fair enough. I'll readily concede to being far from either an expert or a concours judge. All I can say is I've never seen a plastic airbox on a pre-73 911, either carbureted or MFI, and I've looked at more than a few. Also, I notice you're in the UK. Is it also possible that Euro-spec cars got the plastic airboxes before cars destined for US? Perry Kiehl is right about "fire starter" cold start for both 911 and 914-6. Again, not sure about the exact years and models, but some mfi 911s came stock with white plastic airhorns on top of the throttle bodies. The afore-mentioned cold start would sometimes dribble into the airbox. That plus a backfire plus plastic... Well, you get the picture. Not pretty. Hence, many would get swapped for metal carb airhorns. I suspect the same was also true for the airboxes. - MR |
GeorgeRud |
Jan 27 2017, 09:53 AM
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#18
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
Thanks for measuring the top part, seems it is th same. Though my original -6 has the holes for a cold starting system, one was never fitted on mine. Has none ever seen an actual cold start system fitted on their -6? I don't think any were ever actually installed.
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mountainroads |
Jan 27 2017, 10:06 AM
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#19
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Member Group: Members Posts: 210 Joined: 19-February 12 From: Seattle Member No.: 14,145 Region Association: Pacific Northwest |
Thanks for measuring the top part, seems it is th same. Though my original -6 has the holes for a cold starting system, one was never fitted on mine. Has none ever seen an actual cold start system fitted on their -6? I don't think any were ever actually installed. Yap. The 1970 -6 I bought in 1977 had it. Many were disabled due to the engine fire concerns. It also had a metal airbox (IMG:style_emoticons/default/smile.gif) - MR |
gereed75 |
Jan 27 2017, 11:08 AM
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#20
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Senior Member Group: Members Posts: 1,246 Joined: 19-March 13 From: Pittsburgh PA Member No.: 15,674 Region Association: North East States |
Thanks for measuring the top part, seems it is th same. Though my original -6 has the holes for a cold starting system, one was never fitted on mine. Has none ever seen an actual cold start system fitted on their -6? I don't think any were ever actually installed. Yap. The 1970 -6 I bought in 1977 had it. Many were disabled due to the engine fire concerns. It also had a metal airbox (IMG:style_emoticons/default/smile.gif) - MR We did a thread on the cold start squirters over on the originality forum. Some good info there. http://www.914world.com/bbs2/index.php?showtopic=283855 |
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