 PMOs and altitude changes, Questions and experience |
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| 914forme |
 Jun 17 2018, 04:56 PM
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#1
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Times a wastin', get wrenchin'!  Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None 
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I am working on getting the 2.7L redone for dad's 914-6 project. Plan is to drive it to Okteenerfest, and take dad for a beautiful run in the Georgia Mountains. I am not as good as I would like to be with carbs, more of an EFI guy. For some reason PMOs carbs are calling my name.
My one question comes into elevation changes. I really don't want to build the car and then hate the drive if they can't transition well with elevation changes. Any one with experience and know they won't frustrate running up the mountain roads? Are the PMO carbs worth the price of admission? |
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| EdwardBlume |
Jun 18 2018, 05:31 AM
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#2
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California
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I've done some research on EFI and can tell you that the pros outweigh the cons. The people who have done this conversion on the 911s seem to report back that its reliable amongst many other benefits.
The biggest issue is cost. Some of the kits are from hobbyists who deserve every penny for their efforts. Other company kits are higher than that. For me, I have to solve oil cooling and the cost of other components to switch from a 2.4 to a 3.0 EFI, which is kind of frustrating because the 3.0 has a working CIS on it already, but given the leap in years and technology, the kits are the way to go. Bitz Racing has a MS based system which uses the 3.0 intake which I would likely go with. I would have to get a new Kennedy flywheel and clutch, $700. Oil lines, cooler and thermostat $1500, cut the front out $???, and install the kit, including dyno time. The 2.4 when sold will pay for all of this, but I need to get it running and compression verified first. |
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| mb911 |
Jun 18 2018, 05:53 AM
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#3
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914 Guru Group: Members Posts: 6,854 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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QUOTE(Edward Blume @ Jun 18 2018, 03:31 AM)  I've done some research on EFI and can tell you that the pros outweigh the cons. The people who have done this conversion on the 911s seem to report back that its reliable amongst many other benefits. The biggest issue is cost. Some of the kits are from hobbyists who deserve every penny for their efforts. Other company kits are higher than that. For me, I have to solve oil cooling and the cost of other components to switch from a 2.4 to a 3.0 EFI, which is kind of frustrating because the 3.0 has a working CIS on it already, but given the leap in years and technology, the kits are the way to go. Bitz Racing has a MS based system which uses the 3.0 intake which I would likely go with. I would have to get a new Kennedy flywheel and clutch, $700. Oil lines, cooler and thermostat $1500, cut the front out $???, and install the kit, including dyno time. The 2.4 when sold will pay for all of this, but I need to get it running and compression verified first. You could always use the mfi ports in the heads for injectors and the carbs as throttle body's.. Thats my plan some day with my 2.4.. |
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| JmuRiz |
Jun 18 2018, 07:30 AM
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#4
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914 Guru Group: Members Posts: 5,427 Joined: 30-December 02 From: NoVA Member No.: 50 Region Association: MidAtlantic Region
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QUOTE(mb911 @ Jun 18 2018, 03:53 AM) QUOTE(Edward Blume @ Jun 18 2018, 03:31 AM) I've done some research on EFI and can tell you that the pros outweigh the cons. The people who have done this conversion on the 911s seem to report back that its reliable amongst many other benefits. The biggest issue is cost. Some of the kits are from hobbyists who deserve every penny for their efforts. Other company kits are higher than that. For me, I have to solve oil cooling and the cost of other components to switch from a 2.4 to a 3.0 EFI, which is kind of frustrating because the 3.0 has a working CIS on it already, but given the leap in years and technology, the kits are the way to go. Bitz Racing has a MS based system which uses the 3.0 intake which I would likely go with. I would have to get a new Kennedy flywheel and clutch, $700. Oil lines, cooler and thermostat $1500, cut the front out $???, and install the kit, including dyno time. The 2.4 when sold will pay for all of this, but I need to get it running and compression verified first. You could always use the mfi ports in the heads for injectors and the carbs as throttle body's.. Thats my plan some day with my 2.4.. (IMG:style_emoticons/default/agree.gif) jpnovak from the Pelican board did this and it looks good, just get a good controller (MS or something) and you're in the game! If I didn't already have a good set of carbs I got a long time ago for cheap, I'd do EFI....maybe if/when I sell off all my old parts I'll have some $ to splurge |
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Posts in this topic
914forme PMOs and altitude changes Jun 17 2018, 04:56 PM
Mike Bellis I don't know PMO. But no carbs adjust to eleva... Jun 17 2018, 05:50 PM mb911 Lots of jetting fun..
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I will do efi some day ju... Jun 17 2018, 06:31 PM rhodyguy What kind of elevation changes do you expect to se... Jun 17 2018, 06:53 PM porschetub Depends if you have rebuilt the Webers so they wor... Jun 17 2018, 07:53 PM
SirAndy you could just fatten up the idles and mains a tou... Jun 17 2018, 10:54 PM JmuRiz If planning on new PMO money, might as well spring... Jun 17 2018, 08:51 PM 914forme Jim you talking about theseX-Factory? Jun 17 2018, 09:02 PM Mark Henry If you can DIY then you can build an FI system for... Jun 18 2018, 10:17 AM Edward Blume
If you can DIY then you can build an FI system fo... Jun 18 2018, 04:51 PM mlindner Give Richard at PMO a call. He'll have the ans... Jun 18 2018, 12:31 PM |
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