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 )

> 2056 mild carb settings, new tune advice needed
RFoulds
post May 8 2023, 05:58 PM
Post #1


Green Teen 66
***

Group: Members
Posts: 837
Joined: 10-August 09
From: La Quinta, CA
Member No.: 10,656
Region Association: Southwest Region



Now that the milder 2056 is in the car, I could use some advice on carb tune.
compression is at 8.8:1, valves are 44/38, cam is Webcam 86a.

Weber IDF 40's have
37mm venturis,
135 mains
airjets 200
F11 emulsion tube


I am told by the builder that I should step down to 34 venturis, but, have no idea where else to start. Car will go to a good tuner soon enough, just want o have a good starting point.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
VaccaRabite
post May 9 2023, 08:33 AM
Post #2


En Garde!
**********

Group: Admin
Posts: 13,465
Joined: 15-December 03
From: Dallastown, PA
Member No.: 1,435
Region Association: MidAtlantic Region



Yeah. 37mm and 34mm vents are HUGE. They make sense for a race car running WOT all the time, but not for a street driven car. Vent size will change your powerband also. I had 44's on the car with (I think) 32 vents and the car made a ton of power above 4K and was a total dog until 3500 rpm. When I necked down to 40s with 28vents powerband moved to a much more usable range.

Start at 28mm.

50 idles. You may need to go up to 55 idles. I tried 60 and started coking up spark plugs. Most of your driving is on the idle jets.

I had 120 mains on my 2056 and it liked those.
F11 is fine for emulsion tubes.
Zach
User is online!Profile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
RFoulds   2056 mild carb settings   May 8 2023, 05:58 PM
nditiz1   I would start with 115 mains, 28 vents, 50 idle. ...   May 8 2023, 06:22 PM
930cabman   I would start with 115 mains, 28 vents, 50 idle. ...   May 9 2023, 05:57 AM
r_towle   Agree with above Venturis are fir airflow volume a...   May 8 2023, 07:18 PM
VaccaRabite   Yeah. 37mm and 34mm vents are HUGE. They make se...   May 9 2023, 08:33 AM
sportlicherFahrer   I have a very similar engine combo in my '73 c...   May 9 2023, 08:51 AM
RFoulds   Anyone have some 32 vents to sell? Cant seem to s...   May 11 2023, 04:18 PM
sportlicherFahrer   Looks like they may be in stock at CB :confused: ...   May 11 2023, 04:32 PM
RFoulds   Looks like they may be in stock at CB :confused:...   May 11 2023, 05:31 PM
930cabman   Or Pegasus, generally has most any Weber stuff   May 11 2023, 05:28 PM
nditiz1   Pierce manifolds is my go to for all weber parts. ...   May 11 2023, 06:47 PM
rfinegan   Pierce manifolds is my go to for all weber parts....   May 12 2023, 06:27 AM
930cabman   +1 with Pierce, they always have   May 12 2023, 09:40 AM
GBX0073   Randy Congrats on getting your engine back looking...   May 14 2023, 11:15 AM
Spoke   Hijack: On my 2056, I have some popping when the ...   Sep 5 2023, 06:28 AM
rhodyguy   For starters get a set of 32mm Venturi. Go thru th...   Sep 5 2023, 06:34 AM
nditiz1   @spoke I get popping out of my carbs until fully...   Sep 5 2023, 08:15 AM
Spoke   @[url=http://www.914world.com/bbs2/index.php?show...   Sep 5 2023, 12:54 PM
Spoke   @nditiz1 Checked all adjustments and synched the...   Sep 7 2023, 09:47 PM
930cabman   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Sep 8 2023, 05:42 AM
slapshot   I'v got a 75 914 2.0 unknown piston and crank ...   Sep 8 2023, 06:06 PM


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

 



- Lo-Fi Version Time is now: 4th June 2024 - 03:09 PM