Sooty plugs - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old Jul 20th, 03, 07:07 PM Thread Starter
mwh
Senior Tech
Marc
 
Join Date: Sep 1999
Location: Champaign, IL, USA
Posts: 254
Post

These plugs were pulled after only 10 miles of driving, the majority of which was spent above idle, including some WOT blasts. Motor is a 383, Dart Iron Eagle heads, Holley 780 (69 pri/76 sec), and a 472 (69 Z) intake.

The plug on the left was in the #2 hole, and the plug on the right was in the #4 hole. Both look like the motor is running too rich, but it looks like one side of the carb is richer than the other side as #2 and #4 are fed from opposite sides of the carb. The other plugs also follow the pattern.

Idle exhaust has a strong fuel smell, but does not burn my eyes. I am thinking of tightening the idle mixture that feeds #2 by an 1/8th turn and going down to 67 jets on the primary. What do you think?

Plugs are NGK UR4. I also have tried AC R45TS with similar results. Would an NGK UR45 or UR5 be a better choice?

mwh is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old Jul 22nd, 03, 02:16 AM
Senior Tech
 
Join Date: May 2000
Location: Westlake, OH 44145
Posts: 707
Post

I would try another plug in that cyl and see if it happens again before you change any thing.

67 Blown Alcohol Camaro "The Combat Rat" 8-71 and E-85/71 BB SS Chevelle "cheap street" (clone) 12.871 @ 107.59 w/1.915 60' and spinning /2002 35th anniv SS Z28 conv./74 454 El Camino .
Milan is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome