 Measuring Carb air draw, Weird Reaction at #1 |
|
|
|
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. |
|
|
| Allan |
 Dec 18 2005, 01:10 PM
Post
#1
|
|
Teenerless Weenie  Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California  |
While measuring the air flow on my carbs the motor would want to die when we put the meter on the stack feeding the #1 cylinder. All the others were fine.
Any ideas??? |
   |
 
|
  |
Replies
| Dr. Roger |
Dec 18 2005, 01:53 PM
Post
#2
|
|
A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
sounds like a vacuum leak at the vacuum access point.
the only reason i know to have air running past the butterfly is to tone down a radical cam. radical cam = less vacuum. less vacuum =less air/fuel at idle. some guys drill a very small hole or two in their butterflies. i do not suggest you do this. most likely the butterflies are worn and metering ways gummed up a bit. are they old/worn carbs? my last carb was setup that way buy it was old and needed a rebuild. i got a new weber and she runs like a top. upon furthur inspection ans speaking with the PO, i found air and fuel metering was fine but the butterflies were not sealing very well and PO has jetted up on the transition circuit trying to get it to idle right. |
|
|
|
Posts in this topic
Headrage Measuring Carb air draw Dec 18 2005, 01:10 PM
ArtechnikA are you using a SynchroMeter? contemporary UniSyn... Dec 18 2005, 01:15 PM Dr. Roger ... Dec 18 2005, 01:17 PM Headrage ... Dec 18 2005, 01:27 PM SLITS He just traded (yesterday) his 46s for a set of 40... Dec 18 2005, 02:02 PM Headrage Is this the kind of syncrometer to get? Dec 18 2005, 02:12 PM SLITS If your ears are good, a rubber hose works too... Dec 18 2005, 02:16 PM SLITS You know Allan, being your friend, I can't sta... Dec 18 2005, 02:40 PM Headrage Dec 18 2005, 03:18 PM
SLITS As soon as you can get a trailer....I wouldn't... Dec 18 2005, 05:13 PM |
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 28th June 2024 - 12:47 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.