Wanted to get a little better spark plug Boot clearance from my headers . So the parts store was shoked that I ran Autolite 3924 plugs and sold me Accel 576S Header Plugs. They are a little shorter but have HALF the threads. Seems that they will not go as deep into the heads, So can I use thease Accel plugs? or am I worried for nothing ??
If the plugs don't protrude into the combustion area as intended, you don't get the proper flame pattern / complete burn. I would not use, unless they are recommended by the cyl head manufacturer (if you have aftermarket heads). I am sure others will chime in soon. Another concern would be the heat range of the new plug. JMO
I have Dart heads,plugs are straight,not angled. I told the parts this and my concerns with plugs,says they will work. I just want to be shure. I have some work to do before I am ready to start her up.
I guess I'll stay with the same plugs that I have been using. I will try and find the build sheet on my motor and Identify what Dart heads I have ,They look like Iron Eagle SS , but I don't remember, it was built in 2005. I was just trying to get better plugs,thanks mike
Mike, the Autolite 24 (or 3924) series are 14mm gasketed seat with @.750" "Reach" (or the threaded into head part).
The shorties he sold you sound like the standard Chevy head Tapered seat units that are @.460" - he probably didn't get the whole aftermarket head thingy
Are they tapered or gasketed seal?
It is important to get the correct reach - or you won't get the best combustion or you will get mechanical interference ...
Be aware Dart changed the spark plug type they used somewhere along the way, as I had a couple Iron heads bought at different times that had different plug holes (both 200 types) - had to find another to get the set to match ...
Google some of the plug manufactures sites and look through their spec.s page(s) for actual discription and measurements for different plug types.
Other V8 things - some of which float
Other V6 things - none of which float
Oh yeah, and 1 "Straight-Six" ...
If a man says something in the garage - and his wife can't hear him - is he still wrong !!!
You need to contact Dart or look them up on-line. I have Edelbrock Performer RPM heads and they recommend Champion RC12YC. If you look these plugs up youll find them in many lawn mowers, and small engines.
OK I found some paperwork on my engine. Dart Performance Pro One Aluminum Heads.64 cc with 200cc Intake runners . 2.02 Intake valves. Exhaust Valves 1.60 .Originaly had AC delco plugs. I will check out Dart on line.Thanks
Snip the end off your plug wire and thread this cap on: http://www.ngk.com/product.aspx?zpid=20169
Amazon shows a different pic but it's the right one:
Viola about 3/4" of clearance now. The plug cap is a quality unit. It has a threaded "spire" to thread into the plug wire and is completely re-usable.
OK I checked out Dart on the web. I found on their speck pages , AUTOLITE AR133 is what they show, man they look like the ACCELL plugs that the want sell me.I am confused..info was found on the Iron Eagle specks