 DRLAs Question, Rich idle mixture? |
|
|
|
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. |
|
|
| sdoolin |
 Jul 2 2023, 10:41 AM
Post
#1
|
|
Member  Group: Members Posts: 418 Joined: 1-May 14 From: LouKY Member No.: 17,299 Region Association: None  |
2056, dual Dellortos, has been running well for a few years, except in hot humid weather. When it gets hot out, she is hard to start once warm, gotta open throttles all the way. Leaving from a red light also difficult, gotta "clear" the carbs out by opening throttle. Runs fine in high RPM (throttles open(ish)).
Current set-up: Idle Jet = 55 Main Jet = 150 Emulsion Tube = 64 Air Correction (jet stack holder) = 180 Venturis = I forget, but she runs well in mild temps. I am thinking idle jets can go down a size to 50, or maybe 45? Pic because pics help everything (and don't bash my hex bar linkage, I quite like it)...  |
   |
 
|
  |
Replies
| yeahmag |
Jul 3 2023, 10:53 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,479 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California 
|
From my experience:
1) You can't tune well without a wideband 02 2) I've never had a Dell that ran well with less than a 60 idle jet 3) Not sure what that emulsion tube is, it should be the ".2" https://vwparts.aircooled.net/Dellorto-DRLA...-2-p/9164.2.htm 4) Venturi greatly impacts the main jet sizing. You need to know this. 5) 180 is a good starting point on the air correction jet 6) What pump jets are you running? 7) How many turns out are your idle mixture screws? |
|
|
|
Posts in this topic
sdoolin DRLAs Question Jul 2 2023, 10:41 AM
GregAmy You just never really know until you're runnin... Jul 2 2023, 10:50 AM r_towle First, get rid of that hex bar linkage.. :)
Sound... Jul 3 2023, 07:54 AM GregAmy ...and do you have a copy of the Dellorto bible...... Jul 3 2023, 01:00 PM sdoolin Yep, I have a copy (actually two of them) of the D... Jul 4 2023, 08:00 AM 914Toy Agree with the comments above.
On hot start diffi... Jul 4 2023, 08:15 AM MarkV 2056 With Delortos & Hex Bar
Vents - 34
Idle... Jul 5 2023, 12:01 AM rhodyguy What are you using for gaskets under the intakes? Jul 5 2023, 10:41 AM sdoolin My venturis are 34 mm (Jake Raby suggested).
Intak... Jul 5 2023, 01:12 PM
yeahmag What is the timing at idle? Jul 5 2023, 04:07 PM rfinegan
What is the timing at idle?
shoot for about 1... Jul 5 2023, 04:56 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 2nd April 2026 - 11:12 AM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.