 Weber vs Fuel Injection |
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| dhopkins |
 Sep 30 2006, 04:49 PM
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#1
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Member  Group: Members Posts: 50 Joined: 7-July 04 From: Rydal, Pa Member No.: 2,315  |
I just bought a 1976 914 and am thinking about replacing the
FI with carbs. Is this a mistake? DON ------------------------------------------------ 1976 914 1969 911S 1981 911SC |
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| jimkelly |
Sep 30 2006, 04:57 PM
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#2
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
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| BMartin914 |
Sep 30 2006, 04:59 PM
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#3
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||| Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest |
QUOTE(dhopkins @ Sep 30 2006, 02:49 PM)  I just bought a 1976 914 and am thinking about replacing the FI with carbs. Is this a mistake? DON ------------------------------------------------ 1976 914 1969 911S 1981 911SC Why? If it ain't broke don't fix it comes to mind... |
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| Mueller |
Sep 30 2006, 05:00 PM
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#4
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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QUOTE Is this a mistake? which part? You buying a 914 or wanting to convert to carbs?? (IMG:style_emoticons/default/biggrin.gif) Why carbs? Normally they are switched for a "reason"...some good, some not too good... good reason: installing bigger cam or changing displacment or mods that will not allow the stock FI to deal with the changes stock FI is FUBAR'd..missing too many items, or have items that are too costly to replace owner has an understanding of carbs just wants them...not really a bad thing, you will gain 0 in performance, just some piece-of-mind if they are more to your liking..... bad reason: lazy owner/mechanic not wanting to learn how to operate a digital volt meter and spend an hour reading how the stock FI works and how to trouble shoot it (IMG:style_emoticons/default/blink.gif) |
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| GeorgeRud |
Sep 30 2006, 05:00 PM
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#5
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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 |
Unless you're doing different cams, pistons, etc. on the inside, there is no reason to change from the fuel injection. It works much better than carbs with today's gas.
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| Mark Henry |
Sep 30 2006, 05:00 PM
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#6
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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 |
If it ain't broke don't fix it.
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| morph |
Sep 30 2006, 05:22 PM
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#7
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quality parts builder Group: Members Posts: 1,828 Joined: 25-November 03 From: oregon coast Member No.: 1,389 Region Association: Pacific Northwest |
there are pro's & cons to both. fuel injection is a better system. i prefer webers,but thats not because i dont understand FI i maintained the factory FI on my 73 for 10 years.but being a cheap 914 owner.i came to one conclusion.when my FI failed i usally needed a part for it. and that usually ment spending alittle $$$ for the part.when my webers fail. im not spending any money. just time cleaning or adjusting the system.and if set up correctly you rarely have to do that.
thats my .02 you will start a pretty heated debate with this topic and its because people try to tell you what works for them is "the best and the only way!" but in all honesty FI is just a better system. james |
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| SirAndy |
Sep 30 2006, 05:28 PM
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#8
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Resident German Group: Admin Posts: 41,651 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
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| turboman808 |
Sep 30 2006, 05:32 PM
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#9
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Advanced Member Group: Members Posts: 2,718 Joined: 31-January 06 From: North Jersey Member No.: 5,505 Region Association: North East States |
get weber look fuel injection!!! Fucking love it.
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| pfierb |
Sep 30 2006, 05:34 PM
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#10
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oldest member Group: Members Posts: 606 Joined: 1-May 05 From: The sign of good government in Connecticut is to keep raising taxes Member No.: 4,008 |
QUOTE(dhopkins @ Sep 30 2006, 06:49 PM) I just bought a 1976 914 and am thinking about replacing the FI with carbs. Is this a mistake? DON ------------------------------------------------ 1976 914 1969 911S 1981 911SC Yes |
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| Bleyseng |
Sep 30 2006, 05:48 PM
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#11
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
It came with FI because its a better fuel management system producing more hp and torque than the carbs.
A stock motor has a FI cam in it so if you install duals it runs but eats more gas and its hp isnt as good. Those long runners help give the torque that makes the car fun to drive. Now, IF you change the CAM to a carb cam then the point is moot and install the carbs. If you have this dread of getting stuck by the side of the road because of a failed FI part, I have been driving mine for 10 years after re-installing FI without ANY FI parts failing nor broken down because of the FI. Other stuff sure, throttle cables, running outta gas..... (IMG:style_emoticons/default/popcorn[1].gif) |
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| So.Cal.914 |
Sep 30 2006, 06:11 PM
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#12
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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 |
QUOTE(Bleyseng @ Sep 30 2006, 04:48 PM) A stock motor has a FI cam in it so if you install duals it runs but eats more gas and its hp isnt as good. Those long runners help give the torque that makes the car fun to drive. Now, IF you change the CAM to a carb cam then the point is moot and install the carbs. (IMG:style_emoticons/default/popcorn[1].gif) Not that this is the only truth because everyone has had different experiences with their 914's. FI is great, a bit tempermental but it works very well with the stock cam and displacement, and great MPG. That said I will add that my first build was a 1911cc with a cam ground for carb's. The lowend torque and HP that I got from those few things made it a whole new car. I personally would not go back to FI but I will never get rid of this car. If you plan on reselling your car I would leave the FI on, you'll have better resale value. |
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| Bleyseng |
Sep 30 2006, 06:37 PM
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#13
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
No, its the only truth.
The big IFis that changing the cam makes it a whole nuther ballgame. (IMG:style_emoticons/default/aktion035.gif) now, if its just a bolt on hp power by the seat of the pants I want carbs because, do it. (IMG:style_emoticons/default/av-943.gif) The stock FI has so far a hp ceiling of 'bout 120hp as I keep bouncing off it. (IMG:style_emoticons/default/popcorn[1].gif) |
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| Aaron Cox |
Sep 30 2006, 06:55 PM
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#14
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
as said above...
basically stockish motors with FI cams will be more drivable, and make decent power. STOCK FI cannot keep up with larger cams etc.. and thats is why carbs are used, to make more power... Tunable aftermarket (PEFI) FI is even superior to carbs.. they can go on the same motor, and make same peak power as carbs, but will most likely add drivability.... stock motor. leave the FI hot rod = carbs or PEFI |
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| nbscooters |
Sep 30 2006, 07:15 PM
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#15
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Member Group: Members Posts: 165 Joined: 29-June 05 Member No.: 4,347 Region Association: None |
Why is everyone talking about replacing cams, the guy wants to know which system is better. Check out this site.
http://members.rennlist.com/pbanders/carbs.htm |
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| Aaron Cox |
Sep 30 2006, 07:18 PM
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#16
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
QUOTE(nbscooters @ Sep 30 2006, 06:15 PM) Why is everyone talking about replacing cams, the guy wants to know which system is better. Check out this site. http://members.rennlist.com/pbanders/carbs.htm uh because it is relavent. Stock cam = stock FI BIG cam = carbs or PEFI (IMG:style_emoticons/default/blink.gif) |
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| Bleyseng |
Sep 30 2006, 07:32 PM
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#17
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Paul B Anders figured out Djet thats for sure.... great site and info and a must read for 914 Owners.
I think that most of the modern EFI, SDS, MS, Haltech beat Djet hands down plus they can handle wilder cams. My Question is "How Much Wilder of a Cam"? (IMG:style_emoticons/default/hijacked.gif) This also comes back to the question of "What are you trying to acomplish with installing dual carbs.?" Jake is taking type4 motors to new hp levels with EFI and other parts, wow, 200hp out of a 2270cc motor... |
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| JoeSharp |
Sep 30 2006, 07:39 PM
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#18
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
You don't need to replace the cam to get good gas mileage.
Just replace the injestion with dual solex's and you get better than 35 MPG. Linda got 49.16 mpg from Parker Az to Huntington Beach (295 miles and 6 gal of gas). Mileage is not an issue. Power is. Linda can keep up but suffers on the incline. :PERMAGRIN: Joe |
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| Trekkor |
Sep 30 2006, 08:49 PM
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#19
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
We've had this discussion many times. With anger usually coming soon.
I've asked this question in the last few with no answers that I can remember. One of the stock offerings was a dual single barrel carb set-up ( Solex ). Was there a different cam used? What are the lift and duration specs used in the various stock factory motors? KT |
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| Mueller |
Sep 30 2006, 09:02 PM
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#20
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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QUOTE(trekkor @ Sep 30 2006, 07:49 PM) We've had this discussion many times. With anger usually coming soon. I've asked this question in the last few with no answers that I can remember. One of the stock offerings was a dual single barrel carb set-up ( Solex ). Was there a different cam used? What are the lift and duration specs used in the various stock factory motors? Even if the camshaft is 100% the same, it proves nothing......it is a known fact dual carbs work on a stock motor with a stock cam...the problem is that "some" people (not saying the original poster) think that by swapping to carbs only with 0 other modifications that they will magiclly pick-up 20 or more HP (IMG:style_emoticons/default/smile.gif) KT At the last WCC in Portland, I drove around in Ferg's stock 1.7 with dual Solex's or ??? ....car ran great...made me want to buy it and drive it home.... (IMG:style_emoticons/default/MDB2.gif) |
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