| Slant Six Forum https://www.slantsix.org/forum/ |
|
| Before I do some damage https://www.slantsix.org/forum/viewtopic.php?t=60910 |
Page 1 of 1 |
| Author: | drewhost [ Sun Mar 19, 2017 3:01 pm ] |
| Post subject: | Before I do some damage |
...and possibly punch holes in the pistons or break off an electrode, can this be right? The "original" used plugs in the photo are NGK BP5ES-A (yes, I was running quite rich), the comparable-sized plugs are Autolite 66, and the longer plugs are NGK ZFR5N 3459 (I've seen recommended here). I can always hand-crank to ensure that they don't collide, but perhaps someone has already put this concern to rest? My slant six is a 225 in a 72 Dart and should be all stock (but built in Mexico). I've also read that I should remove the metal crush rings, but that would make it an MM or two longer in that chamber. I tried to insert the photos here, but failed despite follwing the instructions on site. Links were my next best option. Thanks for any insight gurus! -Drew https://drive.google.com/file/d/0B51AzY ... sp=sharing https://drive.google.com/file/d/0B51AzY ... sp=sharing |
|
| Author: | SlantSixDan [ Sun Mar 19, 2017 3:34 pm ] |
| Post subject: | |
Use ZFR5N (3459) without metal crush washers. They will not hit the pistons or anything else. |
|
| Author: | drewhost [ Sun Mar 19, 2017 3:46 pm ] |
| Post subject: | |
Alright - you have my trust on this and my thanks for a comprehensive HEI explanation! I'll give this a go next weekend when I get to work on adjusting the carb. Thank you, Drew |
|
| Author: | DusterIdiot [ Sun Mar 19, 2017 5:07 pm ] |
| Post subject: | Lol... |
Quote: but that would make it an MM or two longer in that chamber.
Unless this is a 12:1 compression ratio motor where you took a generous cut off the head and deck... the piston on a stock 225 sits below the deck about +/- 3/16".... even the extended electrode is still above the deck in the chamber on the stock head by a similar amount... At one time I took a head and bought an example of different spark plugs with longer threads and reach just to see where they would sit in a stock chamber... the one for a modern Corvette was the only one that would be impeding the top of the piston if installed... (Note to all, don't use a longer threaded plug as the carbon build up will prevent it from being uninstalled... also moving the kernel can act like altering your timing so you may have other issues...FYI) |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|