Can someone tell me what difference the length is for the short header spark plug VS the standard spark plug comparing plugs for a small block 350.
I have Hooker headers and it's really hard to change plugs so was wondering if shorter plugs would make a difference.
Does one need to change heat range running a short plug?
The overall length has been reduced 1/4" to 3/8" (depending on the specific spark plug) to gain critical air gap space between the spark plug boot and the exhaust manifold or header tube. The shorter spark plug length also can make it easier to install and remove the spark plugs in certain applications where there is not a lot of room to fit a socket or move a wrench around.
I use short style spark plugs and they do give the extra clearence needed to keep the spark plug boot from touching the header. I also bought a low profile spark plug socket to help with removal of the plugs. Its still nice and shiny, havent had a chance to use it yet.