PY Online Forums - Bringing the Pontiac Hobby Together

PY Online Forums - Bringing the Pontiac Hobby Together (https://forums.maxperformanceinc.com/forums/index.php)
-   Pontiac - Street (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=418)
-   -   Spark plug reading (https://forums.maxperformanceinc.com/forums/showthread.php?t=879519)

joes455 03-24-2025 01:57 PM
Spark plug reading
 
3 Attachment(s)
Plugs were run just cruising ,not wot .all plugs looked the same except #1 seems a little rich.Yes I did swap plugs and got same results,also changed #1 intake valve seal.What are your thoughts?

joes455 03-24-2025 02:01 PM
I must add ,new engine with 150 miles still running Driven break in oil.Leak down test 4% ,compression 210psi all cylinders.Plugs are autolite 3923,I just put in some ngk fr5 to test

chiphead 03-24-2025 04:36 PM
Have you done the accel/decel runs to seat rings? Just keep it a bit fat and slow timing down for break in. Don't set the tune on kill for the first 1k miles. Just make sure it's not lean or oil fouling, aka keep it between the ditches for awhile. Use 93 octane or higher.

myam 04-22-2025 07:28 PM
What is the best plug gap

64speed 04-22-2025 07:39 PM
Quote:
Originally Posted by chiphead (Post 6556960)
Have you done the accel/decel runs to seat rings? Just keep it a bit fat and slow timing down for break in. Don't set the tune on kill for the first 1k miles. Just make sure it's not lean or oil fouling, aka keep it between the ditches for awhile. Use 93 octane or higher.
Yea I broke it in properly. I am 10 miles away from 5000 miles on this build. I always run 93 despite my question about cheaper gas.

Kenth 04-23-2025 02:57 AM
Quote:
Originally Posted by myam (Post 6561506)
What is the best plug gap
???

Kenth 04-23-2025 02:58 AM
Quote:
Originally Posted by 64speed (Post 6561507)
Yea I broke it in properly. I am 10 miles away from 5000 miles on this build. I always run 93 despite my question about cheaper gas.
Are you "Joes455" now?

64speed 04-23-2025 06:26 AM
Quote:
Originally Posted by Kenth (Post 6561563)
Are you "Joes455" now?
What?

johnta1 04-23-2025 07:19 AM
This thread on spark plug reading is "Joes455" thread.
Yours is another thread?


:confused:

64speed 04-23-2025 07:29 AM
Oh gotcha I’m sorry missed it. I just scrolled down to the bottom and saw the last comment


All times are GMT -4. The time now is 02:15 AM.