Spark Plug reading Help |
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Spark Plug reading Help |
tornik550 |
Jul 26 2010, 09:32 PM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
I am in the process of tuning my carbs. I had been dealing with some significant rich running issues that I posted in a previous post. That issue is resolved. Now, I am able to drive the car however it seems to hesitate at cruising speeds (2500k rpm). Idle seems a little rough.
I am a novice at reading spark plugs. I am looking for opinions on this plug. The other plugs look the same except the white on the electrode only goes a little past the curve. I should note that the timing was a bit too advance and has been dialed back a slight bit. My guess- little too rich, too hot of spark plug and timing too advanced. Setup info- Dual weber 40 idf- recently sync'd idle jet- 60 mains-145 air correction jets- 200 emulsion tubes- f11 vents 32 Spark Plugs- NGK BP7ES Engine- 2.27l I should also note that I have a lot of spark plugs laying around. Doe anybody know if a NGK BP8ES is hotter old colder than BP7ES (think its colder). Attached thumbnail(s) Attached image(s) |
Mark Henry |
Jul 27 2010, 07:08 AM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Here's a "how to" on webers I found with a quick search, DCOE is the sidedraft version of a IDF.
http://www.teglerizer.com/dcoe/webertune.htm 40mm are getting borderline on a 2270 but they should work fine, all kinds of guys run 40's on 3.0 /6"s. You should run only about 28* advance and try the colder plug. Pop of your pump and the cam grind is stamped around the cam oil pump drive. Man I love tuning with a wide band, I hate the "old school" method now. The real nice thing about a WB is you know if you're lean instantly. |
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