Dellorto question |
|
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. |
|
Dellorto question |
1bad914 |
May 7 2008, 06:10 PM
Post
#1
|
Senior Member Group: Members Posts: 618 Joined: 6-May 04 From: Battle Creek, MI Member No.: 2,028 |
74 2.0 with Dellorto 36 duals has been running fine since I pulled it out of storage, got in it to run pick up a pizza the other day and it seemed to lack power, tonight I took the air filters off and turned on the fuel pump, holy crap the left front carb barrel started filling up with fuel! The rear barrel seemed fine, just the left front barrel??? Any ideas, I have pulled the carb and it looks okay, the only odd thin is the large spring under the brass nut is kind of gunked up. I'll go snap a pic.
These were purchased rebuilt from the guy in Italy, they ran fine all last year. |
1bad914 |
May 7 2008, 06:29 PM
Post
#2
|
Senior Member Group: Members Posts: 618 Joined: 6-May 04 From: Battle Creek, MI Member No.: 2,028 |
Pics of gunked up spring
Attached image(s) |
jr91472 |
May 7 2008, 07:40 PM
Post
#3
|
"I'm pacing myself sergeant..." Group: Members Posts: 1,205 Joined: 2-August 04 From: McKinney, TX Member No.: 2,437 |
You probably have the Dellorto Drip. Go to the clinic and get a quick shot (IMG:style_emoticons/default/biggrin.gif)
Seriously, I had the same problem. Apparently it is fairly common on Dells. Basically there are plugs that are used to fill some passages in the carb used in manufacturing. These eventually begin leaking. Google Art Theron (sp?). He is the man. Ship him your carb and you will be back in business. Didn't cost much as I recall. Do a search here as well. good luck (IMG:style_emoticons/default/beer.gif) |
jr91472 |
May 7 2008, 07:50 PM
Post
#4
|
"I'm pacing myself sergeant..." Group: Members Posts: 1,205 Joined: 2-August 04 From: McKinney, TX Member No.: 2,437 |
|
type11969 |
May 8 2008, 07:29 AM
Post
#5
|
Senior Member Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States |
Check the seat for needle valve in the bowl, make sure no crud has built up on it. If the needle valve doesn't close, fuel will keep flowing into the bowl even once the float is at its highest position and will then dump into the barrel. Interesting it is just one barrel but maybe you were on an incline when you were checking. While you are at it, reset the float height as per the dell manual. A little tweak on the float stops may be all you need to shut the needle valve properly (if that is the problem).
That large spring is for a choke mechanism for an alfa, you aren't using it. My understanding is that as long as that spring is in there, it shuts off the choke circuit so you don't have to worry about it. -Chris |
jr91472 |
May 8 2008, 09:26 AM
Post
#6
|
"I'm pacing myself sergeant..." Group: Members Posts: 1,205 Joined: 2-August 04 From: McKinney, TX Member No.: 2,437 |
Since you already have the top off the carb, simply pour some gas in the bowl and see if it still leaks. If it doesn't leak, then check the needle valve as advised by Type 11969.
If the bowl won't hold fuel, then it is a leak. |
rhodyguy |
May 8 2008, 09:35 AM
Post
#7
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,093 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
i think your carbs need a deeper cleaning than just a soak in the generic cleaner avail in your local auto parts store. the work A.C.E. does is not cheap(not so bad as a set of new carbs). quality seldom is.
k |
1bad914 |
May 11 2008, 08:15 PM
Post
#8
|
Senior Member Group: Members Posts: 618 Joined: 6-May 04 From: Battle Creek, MI Member No.: 2,028 |
I rebuilt a set of 40 webers I had laying around and put them on, they seem to be working well so far. I'll rebuild the Dells and give them a try later. Thanks for the help!
|
Lo-Fi Version | Time is now: 11th June 2024 - 07:36 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |