EFI for my 73 2.0, Replacement fuel injection |
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EFI for my 73 2.0, Replacement fuel injection |
hotlanta914 |
Jul 15 2006, 07:47 AM
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#1
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Newbie Group: Members Posts: 21 Joined: 15-July 06 From: Atlanta, GA Member No.: 6,438 |
(IMG:style_emoticons/default/confused24.gif) does anyone have a suggestion for replacing the stock mechanical fuel injection system with a modern EFI - don't want to go to carbs. Preference would be to end up with a complete, programable engine management system - including ignition - any suggestions?
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DNHunt |
Jul 15 2006, 07:59 AM
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#2
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
There are a few choices. First decide how much time, money and effort you want to invest. Systems start with a diy product called Megasquirt. It takes lots of time and effort but, relatively less money. Then there are self installed but preassembled units like SDS, LinK, Emerald and more. Finally if you want to spend more and do little you can have any of the units professionally installed.
Unless you have made or are planning changes to the stock engine, it MAY still be easier and cheaper to repair the existing system. Take some time and do your homework before you jump. Dave |
type47 |
Jul 15 2006, 07:59 AM
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#3
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
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So.Cal.914 |
Jul 15 2006, 08:02 AM
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#4
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"...And it has a front trunk too." Group: Members Posts: 6,588 Joined: 15-February 04 From: Low Desert, CA./ Hills of N.J. Member No.: 1,658 Region Association: None |
There is no Mech fuel distributor on a 914. There is a control brain and electronic-
ly controled injectors. Some of the others have gone to a Megasquirt system. |
DNHunt |
Jul 15 2006, 08:02 AM
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#5
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
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Cap'n Krusty |
Jul 15 2006, 08:50 AM
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#6
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
"Stock mechanical fuel injection"? A 73 2.0 has EFI. As a replacement, Megasquirt seems to be a favorite around here. The Cap'n
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ottox914 |
Jul 15 2006, 12:04 PM
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#7
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The glory that once was. Group: Members Posts: 1,302 Joined: 15-December 03 From: Mahtomedi, MN Member No.: 1,438 Region Association: Upper MidWest |
Check out this thread:
http://www.914world.com/bbs2/index.php?showtopic=53733 I did my research, and made my decision. You could get into the fuel only for under a grand. You'd have to run the standard dizzy ignition, but depending on your goals and budget, that may be good enough. From all the reading I've been doing, the tuneing looks to be a snap, with the WMS wideband, now that SDS has added some data logging to the package. The SDS with the crank fired ignition will require more work to get the crank trigger set up fabricated and installed. We don't have alot of options on our motors, what with the fan on one end and the tranny on the other. I'll be out of the garage with a ton of work for the next several weeks, but will be posting to the "SDS install" thread as things come togather. |
Brad Roberts |
Jul 15 2006, 12:07 PM
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#8
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Can we do a crnk trigger from the flywheel end with SDS?
B |
blitZ |
Jul 15 2006, 12:08 PM
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#9
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Beer please... Group: Members Posts: 2,223 Joined: 31-August 05 From: Lawrenceville, GA Member No.: 4,719 Region Association: South East States |
Welcome to the club, woo hoo another local Georgia owner.
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ottox914 |
Jul 16 2006, 09:03 AM
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#10
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The glory that once was. Group: Members Posts: 1,302 Joined: 15-December 03 From: Mahtomedi, MN Member No.: 1,438 Region Association: Upper MidWest |
I plan to look that over also, but the clearance SDS wants to the hall sensor is mighty tight, on the order of 2-3mm as I would recall, so the mounting of the sensor might be interesting, in terms of finding a small, flat area. The mounting on the pulley has several advantages, mostly being that the pulley and fan shroud can be moved easily from one long block to another, where as if the flywheel is worn below tolerances and needs re-surfacing, you'd need to re-mount the mags all over again on the replacement flywheel. Not the worst job in the world, but I'd rather do it once than twice. Also, I'm not sure which area would be "cleaner", such that there would be less possibility of oil/dirt/stuff getting on or fouling the sensor.
Any thoughts? |
nbscooters |
Jul 16 2006, 10:55 AM
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#11
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Member Group: Members Posts: 165 Joined: 29-June 05 Member No.: 4,347 Region Association: None |
drop in a 3.6 twin turbo and a motec and you should be fine.
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Brad Roberts |
Jul 16 2006, 11:05 AM
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#12
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
All factory Porsches since 1984 or so have ran flywheel triggered Motronic (with 2-3mm air gap) The actual sensors are fairly cheap to come by.
I just find it easier to adjust/fiddle with *stuff* back by the bellhousing than things buried up near the fan shroud. The flywheel sensor would/could be a tiny allen bolt threaded into the flywheel. Pretty easy. B |
Air_Cooled_Nut |
Jul 16 2006, 11:07 AM
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#13
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914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
I plan to look that over also, but the clearance SDS wants to the hall sensor is mighty tight, on the order of 2-3mm as I would recall, so the mounting of the sensor might be interesting, in terms of finding a small, flat area. The mounting on the pulley has several advantages, mostly being that the pulley and fan shroud can be moved easily from one long block to another, where as if the flywheel is worn below tolerances and needs re-surfacing, you'd need to re-mount the mags all over again on the replacement flywheel. Not the worst job in the world, but I'd rather do it once than twice. Also, I'm not sure which area would be "cleaner", such that there would be less possibility of oil/dirt/stuff getting on or fouling the sensor. Any thoughts? A Hall sensor is magnetic (well, uses a magnetic field...it ain't optical). 2-3mm distance, with accumulated debris, won't affect the sensor. That distance alone kinda helps everything "self clean" (IMG:style_emoticons/default/wink.gif) |
lapuwali |
Jul 16 2006, 11:12 AM
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#14
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
SDS is fairly inflexible on what it wants as a trigger. For a four, they'd want three magnets (bolts won't do, they use Hall sensors), two at TDC for each pair, and the last at 40 degrees BTDC for cylinder 1. The cylinder 1 magnet is flipped (N v. S), and there are two Hall sensors, one N activated, the other S activated.
Doing this on the flywheel would likely be possible, but there wouldn't be much advantage to doing so. |
Brad Roberts |
Jul 16 2006, 11:19 AM
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#15
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Gotcha. I didnt know what the SDS requirements where.
Now that I have access to a real chassis dyno (not DynoJet) down here, I'll start warming up again to aftermarket injection idea on 4 and 6cyl engines. I'm also going to need something for the Boxsters soon. B |
ottox914 |
Jul 16 2006, 04:02 PM
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#16
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The glory that once was. Group: Members Posts: 1,302 Joined: 15-December 03 From: Mahtomedi, MN Member No.: 1,438 Region Association: Upper MidWest |
The engine and trans are dropped, and the SDS goodies showed up friday. Just got back from a wedding & hangover over the weekend. I do plan to have a look at the flywheel as an option, as the SDS system will want to "see" the magnets, and if the hall sensor is burried in the fan housing, it'll be pretty hard to adjust the slotted sensor to make sure its centered on the mags. If there is a better way/place to mount it all, while allowing semi-easy (not dropping or tearing the motor appart) to make any adjustments needed, I'll look for it, and of course will be posting photos and FYI's to the install thread.
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yarin |
Jul 18 2006, 08:07 PM
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#17
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
MEGASQUIRT!!
If you want to do it yourself, build it, install it, tune it.. i would go that route. Keep in mind its not plug and play. Also figure in $200 for an Innovative LC-1 wideband O2 sensor, they are awesome. There is no need to go with crank triggering and all of that. Sky is the limit, but go one step at a time. I'm just running Fuel only and triggering off the coil. Soon i'll trigger off the dizzy and fire the coil with direct ignition so i can control spark. One thing at a time though. |
Brad Roberts |
Jul 18 2006, 09:08 PM
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#18
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
The 914Club can sell a complete turnkey SDS solution with ignition for $1900.
This is everything you need to make a stock 2.0 run on modern technology. New harness New temp sensors New throttle position switch New coil setup Crank trigger with brackets Programming DONE for a 73+74 2.0 B |
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