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#1
03-24-2025, 01:57 PM
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Spark plug reading
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?
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76 T/A 455, cnc chamber E heads,OF hyd roller ,yella terra shaft rockers 11.47 119 |
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#2
03-24-2025, 02:01 PM
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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
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76 T/A 455, cnc chamber E heads,OF hyd roller ,yella terra shaft rockers 11.47 119 |
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#3
03-24-2025, 04:36 PM
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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.
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I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
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#4
04-22-2025, 07:28 PM
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What is the best plug gap
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#5
04-22-2025, 07:39 PM
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Quote:
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
| The Following User Says Thank You to 64speed For This Useful Post: | ||
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#6
04-23-2025, 02:57 AM
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Quote:
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#7
04-23-2025, 02:58 AM
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Quote:
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#8
04-23-2025, 06:26 AM
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Quote:
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
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#9
04-23-2025, 07:19 AM
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This thread on spark plug reading is "Joes455" thread.
Yours is another thread? 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#10
04-23-2025, 07:29 AM
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Oh gotcha I’m sorry missed it. I just scrolled down to the bottom and saw the last comment
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. Last edited by 64speed; 04-23-2025 at 07:47 AM. |
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