Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> Why EFI?, maybe excellence was expected and they came as close as they could..
Gunn1
post Jun 11 2016, 03:59 PM
Post #1


Senior Member
***

Group: Members
Posts: 1,021
Joined: 14-February 16
From: Minnesota
Member No.: 19,670
Region Association: None



Did Porsche eff up?

No they didn't eff up, they did the best they could with the new technology they had. It seems as though the technology was purchased by the folks at Bosch from the aviation component of Bendix. That said most Injection systems were originally good at idle and full open throttle, so primarily racing applications. So in there infancy not well suited for automobile applications.

Been reading on different types of fuel delivery systems and their pro and cons.


There are very few con's to todays EFI systems, there were however performance and reliability issues with the original designs. Even today Claims of increased HP, Fuel economy, drivability, reliability and so on....some still dispute
how much these differences really mean. It appears the main thing EFI does extremely well over Carbs is in the pollution factor, or in this case the ability to pollute less. Carbs are a some what open system allowing hydro carbons to escape/vent in to our atmosphere even when the engine is at rest, where as the EFI is essentially a closed system releasing no vapors or gases unless the engine is running and those gases are then coming out of the tailpipe from the exhaust cycle.

Many of the Guru's (about 5 to 1) prefer carburation.

The above Statement isn't correct, although what confuses this OP is the sheer amount of photographic evidence on this site and others including evilbay and CL showing most engine compartments with Carbs installed. Many here have spent thousands on their cars, and what do you see when the lid is lifted? a Carburated engine..... So while my intentions will be keeping my cars in their stock or near stock form, with EFI, I cannot understand why so many Carburated cars. (Because its easy isn't an answer, because its simple isn't an answer and because its cheap isn't an answer)

With this being the case, Did Porsche mess up when they went the EFI route with the 914?


I do not believe they messed up, I believe they did the best they could with the available technology they had. Granted they did sort of use the end user as of a kind of a guinea pig/test bed, but what manufacturer doesn't in some way.

WHY DID THEY DO IT?????


I think that just as much as seeing the Ljet and Djet as a performance and platform to develop future EFI systems off of, Porsche and others also incorporated EFI into there products to show they were progressive company's in design and practicality.
EFI, Unibody, Targa, Mid engine, four wheel disc, and many more attributes can be cited as Porsches View into the future.

I would like to keep my car stock with the factory EFI, but increasingly getting more difficult to do with so little information backing it up.


Above statement is also incorrect. In my case I think I am fortunate because I believe I have most the parts needed to reinstall the factory EFI's on all three of my cars. There is a plethora of info on both sides, but for now.... just for originalities sake, EFI will be the way I go.

To those that added constructive comments and or facts to this thread... it is much appreciated...to those that took this thread as some sort of attack on their beliefs, or way to "clutter" the site, I can appreciate how you feel, but I just see those arguments as shutting down the free flow of ideas and the give and take of facts that get each of us to arrive at our own understanding of the information.
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
OU812   Why EFI?   Jun 11 2016, 03:59 PM
Rand   How many modern cars do you see with carbs? There ...   Jun 11 2016, 04:11 PM
OU812   How many modern cars do you see with carbs? There...   Jun 11 2016, 04:23 PM
colingreene   Sure because the EFI was designed to run the motor...   Jun 11 2016, 04:37 PM
Rand   There are too many variables depending on the buil...   Jun 11 2016, 04:50 PM
Mueller   Did Porsche eff up? No, everyone was going fuel ...   Jun 11 2016, 05:18 PM
OU812   [quote name='OU812' post='2358056' date='Jun 11 2...   Jun 11 2016, 06:17 PM
Zimms   The benefits to EFI occur at lower speeds in the ...   Jun 11 2016, 07:34 PM
Mueller   "Will your engine make more peak power with ...   Jun 11 2016, 08:12 PM
Racer Chris   "Will your engine make more peak power with...   Jun 12 2016, 03:49 AM
worn   [ See all the made up Shit Below "Will your...   Jun 13 2016, 02:44 PM
ConeDodger   I'm wondering how old your reference is. Carbs...   Jun 11 2016, 05:44 PM
Rand   Like Mueller said, please cite the source. And the...   Jun 11 2016, 06:21 PM
OU812   Like Mueller said, please cite the source. And th...   Jun 11 2016, 06:28 PM
Rand   Like Mueller said, please cite the source. And t...   Jun 11 2016, 07:22 PM
Steve   Most of us respect Jake. If your building a budge...   Jun 11 2016, 07:17 PM
OU812   Most of us respect Jake. If your building a budg...   Jun 11 2016, 07:20 PM
ClayPerrine   Most of us respect Jake. If your building a budg...   Jun 11 2016, 07:24 PM
Steve   Most of us respect Jake. If your building a bud...   Jun 11 2016, 07:43 PM
McMark   Many of the Guru's (about 5 to 1) prefer carbu...   Jun 11 2016, 07:38 PM
Amphicar770   Who are these gurus you are referring to? Open up...   Jun 11 2016, 08:00 PM
Rand   If you enjoy touching your starter in any weather ...   Jun 11 2016, 08:12 PM
RacingDreamz   Hell, I just want my EFI to work so I can start th...   Jun 11 2016, 08:12 PM
stugray   You can have vastly different levels of tunability...   Jun 11 2016, 08:24 PM
Mueller   You can have vastly different levels of tunabilit...   Jun 11 2016, 08:38 PM
zipedadoo   Another plus is that a modern fuel injection/compu...   Jun 11 2016, 09:02 PM
r_towle   Stop being so arguementative with every thread. St...   Jun 11 2016, 09:12 PM
Mueller   Stop being so arguementative with every thread. S...   Jun 11 2016, 09:15 PM
914_teener   Stop being so arguementative with every thread. S...   Jun 11 2016, 10:00 PM
Jason74914   I also think there is some merit/value to keeping ...   Jun 11 2016, 10:17 PM
Steve Pratel   How old are you? If youre not like 16 dude, you a...   Jun 11 2016, 11:03 PM
falcor75   Just a tip for anyone wanting to go modern EFI ins...   Jun 12 2016, 12:03 AM
OU812   Just a tip for anyone wanting to go modern EFI in...   Jun 12 2016, 03:10 AM
somd914   In respect to increasing displacement and power on...   Jun 12 2016, 05:31 AM
barefoot   The EFI D-jet system first used on our 914's w...   Jun 12 2016, 07:08 AM
era vulgaris   Jesus dude, OU812, chill out man. You remind me of...   Jun 12 2016, 07:59 AM
RacingDreamz   Jesus dude, OU812, chill out man. You remind me o...   Jun 12 2016, 12:33 PM
DBCooper   To me the question itself, "Why EFI? Why did ...   Jun 12 2016, 08:33 AM
Mueller   To me the question itself, "Why EFI? Why did...   Jun 12 2016, 09:25 AM
Bleyseng   The MPS is quite tuneable but you just have to lea...   Jun 12 2016, 09:40 AM
SirAndy   Many of the Guru's (about 5 to 1) prefer carbu...   Jun 12 2016, 09:54 AM
Mark Henry   Lots of experience here and I can make both system...   Jun 12 2016, 10:05 AM
Mueller   Mostly do to the advent of personal computers, b...   Jun 12 2016, 10:25 AM
JmuRiz   Give him time, he'll find a guru saying carbs...   Jun 12 2016, 11:37 AM
OU812   Lots of experience here and I can make both syste...   Jun 12 2016, 12:05 PM
914_teener   [quote name='Mark Henry' post='2358336' date='Jun...   Jun 12 2016, 12:51 PM
914Mike   ... In a street car I don't give a poop what y...   Jun 12 2016, 09:48 PM
moorepower   Carburetor = controlled fuel leak.   Jun 12 2016, 10:31 AM
Mueller   It is they way you ask...or at least perceived by ...   Jun 12 2016, 12:14 PM
Amphicar770   Wow. OP needs to get over himself. You made a bo...   Jun 12 2016, 12:47 PM
OU812   Wow. OP needs to get over himself. You made a b...   Jun 12 2016, 02:16 PM
gereed75   OU, reread your first post that starts with ...   Jun 12 2016, 02:14 PM
OU812   OU, reread your first post that starts with ...   Jun 12 2016, 02:31 PM
gereed75   Didn't all of the query's end in question ...   Jun 12 2016, 02:47 PM
The Cabinetmaker   "Like I said before if you don't like the...   Jun 12 2016, 02:55 PM
gereed75   "Like I said before if you don't like th...   Jun 12 2016, 02:59 PM
ConeDodger   Did Porsche eff up? No, most definitely not. Th...   Jun 12 2016, 03:34 PM
Steve Pratel   Yes ladies and gentlemen, we have a :miles: :driv...   Jun 12 2016, 05:56 PM
OU812   Yes ladies and gentlemen, we have a :miles: :dri...   Jun 12 2016, 06:23 PM
OU812   Yes ladies and gentlemen, we have a :miles: :dr...   Jun 12 2016, 06:24 PM
ConeDodger   Yes ladies and gentlemen, we have a :miles: :dr...   Jun 12 2016, 09:22 PM
bandjoey   :wttc:   Jun 12 2016, 06:03 PM
OU812   :wttc: Thanks   Jun 12 2016, 06:20 PM
The Cabinetmaker   "I would like to keep my car stock with the f...   Jun 12 2016, 06:20 PM
396   Oh no, another senseless tread from the expert tha...   Jun 12 2016, 07:08 PM
OU812   Oh no, another senseless tread from the expert th...   Jun 12 2016, 07:18 PM
Amphicar770   Oh, OU812. As the judge probably told you when he...   Jun 12 2016, 07:10 PM
OU812   I feel like Trump   Jun 12 2016, 07:12 PM
Amphicar770   I feel like Trump Now that was actually humorou...   Jun 12 2016, 07:17 PM
theleschyouknow   Did Porsche eff up? Been reading on different ty...   Jun 12 2016, 10:06 PM
JamesM   Did Porsche eff up? Been reading on different ty...   Jun 12 2016, 10:16 PM
Rand   ...   Jun 12 2016, 10:29 PM
OU812   ... ...   Jun 13 2016, 07:09 AM
Darren C   Sitting on the fence watching this thread unfold, ...   Jun 13 2016, 07:42 AM
OU812   Sitting on the fence watching this thread unfold,...   Jun 13 2016, 08:12 AM
Jeff Bowlsby   This information is worth far more than the 4 pa...   Jun 13 2016, 09:07 AM
DBCooper   Interpret this data as you will, it shows the pro...   Jun 13 2016, 10:58 AM
stugray   This information is worth far more than the 4 pa...   Jun 13 2016, 11:12 AM
SirAndy   My latest task was to see what happens when you fi...   Jun 13 2016, 11:57 AM
GregAmy   The D-Jet in my '74 2L is not terrible, and is...   Jun 13 2016, 07:44 AM
John Jentz   Wow, 4 pages and no one states the obvious! PO...   Jun 13 2016, 08:55 AM
dlkawashima   Wow, 4 pages and no one states the obvious! P...   Jun 13 2016, 09:28 AM
Darren C   Thanks Jeff. Now I throw out the challenge to som...   Jun 13 2016, 09:20 AM
John Jentz   Thanks Jeff. Now I throw out the challenge to so...   Jun 13 2016, 09:30 AM
ConeDodger   Thanks Jeff. Now I throw out the challenge to so...   Jun 13 2016, 10:29 AM
somd914   Thanks Jeff. Now I throw out the challenge to so...   Jun 13 2016, 04:37 PM
Jeff Bowlsby   Here is a summary of the factory specs:   Jun 13 2016, 09:27 AM
Darren C   Very Nice info Jeff, but it doesn't show AFR w...   Jun 13 2016, 09:31 AM
brant   We all know the real answer was emissions, my inp...   Jun 13 2016, 10:13 AM
gereed75   Thanks Darren for the post. Wish it had been star...   Jun 13 2016, 11:13 AM
brant   Thanks Darren for the post. Wish it had been sta...   Jun 13 2016, 11:28 AM
gereed75   Thanks Brant, First let me say that I also conside...   Jun 13 2016, 11:44 AM
brant   Thanks Brant, First let me say that I also consid...   Jun 13 2016, 03:19 PM
rdauenhauer   :agree: :first: :headbanger: Bravo, that is ...   Jun 13 2016, 12:19 PM
Jake Raby   Either system works fine, IF the user can tune it....   Jun 13 2016, 01:17 PM
Darren C   Hold on guy’s, I know the OP has got everyone ho...   Jun 13 2016, 02:57 PM
SirAndy   My car is a US California car, so its stock wasnâ€...   Jun 13 2016, 04:11 PM
Darren C   My car is a US California car, so its stock wasnâ...   Jun 13 2016, 04:39 PM
jd74914   FWIW: Using the factory measurements from 30 years...   Jun 13 2016, 05:11 PM
Darren C   To me it's quite impressive that Darren...   Jun 13 2016, 05:21 PM
3 Pages V  1 2 3 >


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 27th April 2024 - 04:50 AM