 EFI vs Carbs, This will start a crap storm |
|
|
|
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. |
|
|
| ellisor3 |
 Apr 16 2009, 06:28 AM
Post
#1
|
|
HPWhore  Group: Members Posts: 811 Joined: 23-October 08 From: Fleming Island, Florida Member No.: 9,683 Region Association: South East States   |
I inherited a pair of Zenith carbs on my six conversion I purchased last year. Yes that is Zenith, not PMO or Weber-Zenith. The set-up was done by Motor Scheister several years ago by the PO (IMG:style_emoticons/default/sheeplove.gif) . I have been working with these for the last month to get them tuned and sync'd. I can not for the life of me get them right. They will idle ok but at acceleration they backfire or vise versa. They were rebuilt at AA back in the summer, but that did not solve the problem. No exhaust leak, new plug and the same problems. Some adjustments don't have any effect at all on the set-up. (IMG:style_emoticons/default/headbang.gif) I am at my wits-end on these damn things.
Anyway my delima is whether I should replace the Carb's with PMO or Weber or simply junk the carb idea and move to EFI. Here are some of my considerations, but wanted some I may have missed. 1.) Cost of Carb PMO's $3500 2.) Cost of EFI ?? 3.) Ease of adjusting/reliability-EFI 4.) I live in Florida so high humidity-EFI?? 5.) Fuel efficency-EFI 6.) Acceleration-Wash?? Thanks for your input |
   |
 
|
  |
Replies
| rfuerst911sc |
Apr 16 2009, 03:21 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,158 Joined: 4-May 06 From: Dahlonega , Georgia Member No.: 5,980 Region Association: South East States |
You say the motor is a 3.0 has the ignition distributor been " setup " to run with carbs? I don't believe she will run great without this being done. I have a 1983 911SC running PMO's and my 914GT clone will be running a 3.0 with 40mm Webers. In both cases I pulled the distributor and sent them off to be completely refurbed AND setup for carbs. They eliminate the vacumn advance and do other internal voodoo to make it play well with carbs. Runs aprox. $450.00 - 500.00 for a real pro to do it.
|
|
|
|
| ellisor3 |
Apr 16 2009, 04:02 PM
Post
#3
|
|
HPWhore Group: Members Posts: 811 Joined: 23-October 08 From: Fleming Island, Florida Member No.: 9,683 Region Association: South East States |
QUOTE(rfuerst911sc @ Apr 16 2009, 05:21 PM)  You say the motor is a 3.0 has the ignition distributor been " setup " to run with carbs? I don't believe she will run great without this being done. I have a 1983 911SC running PMO's and my 914GT clone will be running a 3.0 with 40mm Webers. In both cases I pulled the distributor and sent them off to be completely refurbed AND setup for carbs. They eliminate the vacumn advance and do other internal voodoo to make it play well with carbs. Runs aprox. $450.00 - 500.00 for a real pro to do it. The distributor looks pretty new, new wires, ect. I have only had the car since last summer, so I assume someone would have done this. Maybe not. The carbs have virtually every vacuum plugged and/or linked but that is a great point to check out. Thanks. |
|
|
|
Posts in this topic
ellisor3 EFI vs Carbs Apr 16 2009, 06:28 AM
ahdoman We need a little more info to help...
1) What size... Apr 16 2009, 09:26 AM
ellisor3
We need a little more info to help...
1) What siz... Apr 16 2009, 11:50 AM ConeDodger PMO carbs are very - very good. Congratulations, y... Apr 16 2009, 09:31 AM ellisor3
PMO carbs are very - very good. Congratulations, ... Apr 16 2009, 11:52 AM SirAndy If the engine was done by Motor Meister, maybe you... Apr 16 2009, 10:43 AM McMark :agree: You could easily spend thousands chasing ... Apr 16 2009, 11:45 AM ellisor3
:agree: You could easily spend thousands chasing... Apr 16 2009, 11:55 AM Phoenix 914-6GT My engine was doing the same thing you are talking... Apr 16 2009, 12:10 PM jt914-6 :agree:
I too have a 3.0 set up for carbs., 40 ID... Apr 16 2009, 03:55 PM naro914 Someone wiser than me told me once that 90% of car... Apr 19 2009, 03:38 PM ellisor3
Someone wiser than me told me once that 90% of ca... Apr 20 2009, 07:24 PM naro914 Thanks. Bob Chapman did a great article.
Huey is ... Apr 20 2009, 08:08 PM |
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th June 2024 - 10:56 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.