 Relationship between idle jets and idle mix screws |
|
|
|
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. |
|
|
| era vulgaris |
 May 9 2016, 04:06 PM
Post
#1
|
|
J is for Genius  Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States  |
How much can one compensate for the other?
For example, with larger jets and idle screws further in, could you tune a set of carbs identically to another set of the same carbs that had smaller jets with the mix screw further out? I want to experiment with going a little leaner at idle and seeing how my engine likes it. I'm trying to decide if I should order a smaller set of idle jets or if I can achieve the same result by just turning the screws in further. Basically, what is the difference? Don't they achieve the same ends? Obviously there's a limit on the rich side because there's only so much fuel a jet will allow to flow. But if you're trying to lean it out, what's the difference between going to a smaller jet or just turning in the screw? |
   |
 
|
Posts in this topic
era vulgaris Relationship between idle jets and idle mix screws May 9 2016, 04:06 PM
Justinp71 On all the carbs I've worked on the idle screw... May 9 2016, 04:27 PM r_towle First answer, no, it does not work that way.
Then,... May 9 2016, 05:41 PM era vulgaris Thanks for the info guys!
I already have an o... May 9 2016, 06:23 PM rhodyguy At what rpm does your car idle? Does your car stil... May 9 2016, 06:40 PM era vulgaris It idles around 1100.
Yeah I normally roll up to... May 9 2016, 06:47 PM
rfinegan
It idles around 1100.
Yeah I normally roll up t... May 10 2016, 04:35 AM somd914 This doesn't answer your question but there is... May 9 2016, 07:00 PM PancakePorsche After 3-4 turns out, idle mixture screws are not ... May 10 2016, 12:21 AM rhodyguy See if you can achieve a stable idle @ 950rpm. May 10 2016, 07:15 AM era vulgaris
After 3-4 turns out, idle mixture screws are not... May 10 2016, 07:42 AM Justinp71 Yes, AFR gauges are great.
Also make sure you don... May 10 2016, 04:05 PM r_towle Talking about heat syncing and how it affects the ... May 10 2016, 04:13 PM era vulgaris I do have phenolic spacers between the heads and t... May 10 2016, 04:40 PM r_towle I saw the thread, was not blind, just bored stiff ... May 10 2016, 07:25 PM era vulgaris Sorry, the missed thread comment was directed at J... May 10 2016, 09:37 PM r_towle Ok,
Sounds like a great car that runs perfectly fi... May 10 2016, 11:05 PM era vulgaris Haha, yeah you're probably right. And if this... May 11 2016, 07:48 AM r_towle Thus why I have no gauges in mine....I took out th... May 11 2016, 07:45 PM  |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 19th May 2024 - 01:44 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.