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 )

> Progressive 32-36 single
Ronnie J
post Nov 25 2004, 10:54 PM
Post #1


Newbie
*

Group: Members
Posts: 20
Joined: 31-October 04
From: Fairbanks, AK
Member No.: 3,039
Does anyone run a Progressive 32-36 single carb system. It just seems it would be a lot easier to keep tuned. I have a 1.7 without F.I. Any suggestions are appreciated.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 12)
Mueller
post Nov 25 2004, 10:59 PM
Post #2


914 Freak!
***************

Group: Members
Posts: 17,146
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
terrible idea (IMG:style_emoticons/default/smile.gif)

do a search here, you'll find plenty of posts explaining why not a good choice for our type of engines....


BTW, welcome (IMG:style_emoticons/default/clap56.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ChrisReale
post Nov 25 2004, 11:17 PM
Post #3


Sleazy
****

Group: Members
Posts: 2,665
Joined: 20-January 03
From: San Francisco
Member No.: 176
You probably could find a full 1.7 D-Jet injection for pretty cheap.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dr Evil
post Nov 25 2004, 11:19 PM
Post #4


Send me your transmission!
***************

Group: Members
Posts: 23,002
Joined: 21-November 03
From: Loveland, OH 45140
Member No.: 1,372
Region Association: MidAtlantic Region
Your title sounds like a personal ad. (IMG:style_emoticons/default/cool.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jake Raby
post Nov 26 2004, 05:44 AM
Post #5


Engine Surgeon
*****

Group: Members
Posts: 9,394
Joined: 31-August 03
From: Lost
Member No.: 1,095
Region Association: South East States
May as well use a windex spray bottle filled with gas to atomize your fuel with one of those pigs!

Duals or nuttin!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Spoke
post Nov 26 2004, 07:24 AM
Post #6


Jerry
*****

Group: Members
Posts: 6,991
Joined: 29-October 04
From: Allentown, PA
Member No.: 3,031
Region Association: None
I have a 1.7L with a single carb like you describe. It runs ok and is relatively simple but it has some limitations. There is a delay when opening the throttle like when coming out of a turn. I think its the long tubes that do that. I'm in the process of tracking down a FI system to replace my carb. Plus cold engine operation during cold weather really sucks but this may still be a choke adjustment for my car.

Spoke
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TheCabinetmaker
post Nov 26 2004, 07:26 AM
Post #7


I drive my car everyday
*****

Group: Members
Posts: 8,304
Joined: 8-May 03
From: Tulsa, Ok.
Member No.: 666
I know I'm gonna catch hell for this but, they are better than nothing. Nothing won't make your car go. Duals are obviously better, but if it's all ya got, it's all ya got. I've got a few guys who cars had them when they got them. They are not the most effecient, but they work and are relative trouble free. You can probably find a FI system (my first choice) for the price of new duals.

Flame on brothers.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Nov 26 2004, 07:38 AM
Post #8


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
Lightweight boat anchor....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TC/914
post Nov 26 2004, 08:12 AM
Post #9


Member
**

Group: Members
Posts: 203
Joined: 21-October 04
From: Southern MA
Member No.: 2,981
I ran one for years on my 914 with the 1.7 engine in it. Just ran like a top. When I worked (occasionally) at a VW repair shop that specialized in Type IV's most of the installations were on the later 2 liter engines and (I feel that) the carbs performed TERRIBLY ! ! ! The Type IV engine is different from the one on the 914, but it was more the carb than the engine. Maybe good for the smaller engine, although it NEEDS EXTENSIVE TUNING, lousy on the larger one.

Luck,

TC

There's a complete set-up on ebay right now for short money, maybe grab it and play around a little . . .
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TheCabinetmaker
post Nov 26 2004, 08:20 AM
Post #10


I drive my car everyday
*****

Group: Members
Posts: 8,304
Joined: 8-May 03
From: Tulsa, Ok.
Member No.: 666
TC, I'm not sure I understand your post. 1.7L in a 917?
How is a type IV different than the one in a 914?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TC/914
post Nov 26 2004, 08:45 AM
Post #11


Member
**

Group: Members
Posts: 203
Joined: 21-October 04
From: Southern MA
Member No.: 2,981
Oooopppsss!!

My bad typing at work, I just edited the post. (My brain sort of melded the "914" and "1.7" into a wishful thinking sort of mess . . . ) Wouldn't it be beyond WONDERFUL to own a 917?!?

Whenever we checked the compression on an (72 and up Bus VW type IV) engine--standard proceedure, along with fuel and oil pressure whenever a bus came in for repairs--it was lower than that of my 914 (NOT 917). I had always thought that the engine used in the bus was a little de-tuned from that found in the 914 (and 411/412 VW sedans). I had heard that the dish in the bus pistons wasn't in the Porsche pistons. Also, the progressive carbs seem to respond better to a cam which made me think that the grind in a 914 was slightly different than that in a VW Bus/type IV.

I might be wrong, if I am PLEASE let me know since I've been going on the above assumption for almost six years and if it's in error . . . well, I want to know.

Thanks,

TC
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jake Raby
post Nov 26 2004, 09:30 AM
Post #12


Engine Surgeon
*****

Group: Members
Posts: 9,394
Joined: 31-August 03
From: Lost
Member No.: 1,095
Region Association: South East States
One huge issue is the super long runners and no carb heat.

The long runners create a tuning nightmare and the no heat situation will ice the carb completely on humid cold nights like we have here in the Southeast..

I have had a 914 actually stall from a frozen carb before!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TC/914
post Nov 26 2004, 09:45 AM
Post #13


Member
**

Group: Members
Posts: 203
Joined: 21-October 04
From: Southern MA
Member No.: 2,981
YES! I've always wondered about the runners. I'm surprised that the carbs work as good (or at all) as they sometimes do. The original design using the long runners was meant for air alone, wasn't it? The fuel was supplied down stream at the injectors? Considering the work that goes into match porting and smoothing/grinding the dual carb intakes for Type IV and even Type I engines, it seems sort of "don't bother, it'll work good enough" to just run with metal tubes connected to a collector box/carb mount. No pyramid or channels in the carb mount/manifold., no chimney from the exhaust header to the tubes, no pre-heat at the air cleaner from the muffler, nothing at all.
Maybe the set-up was originally used in South America (like the KADS)?

Donno . . .

TC
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

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

 

Display Mode: Switch to: Standard · Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 7th June 2024 - 03:38 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
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 ...