Eric, Are you talking about a VW engine? What kind of plugs, depth of the threaded area? The only place I have seen a problem, is on the VW when the plug treaded area has been bored out, to allow for the 1/2" reach of the aircraft plugs for the magneto. It is not uncommon for these to get blown out.
However, if you have genuine VW heads, they have plenty of meat, where the plug goes, either one. And if you use auto plugs with a 3/4" reach, or can find aircraft plugs with a 3/4" reach that you are willing to pay for, you should not need any type of insert. See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2010 - KR Gathering in Richmond, Ky - I39 There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC -----Original Message----- Shortly I hope to have a second set of spark plugs installed for dual ignition.Are there any do's or dont's of note ? Should one have the helicoil steel inserts for example ?
