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bozo7792
Tribal Scout

2 Posts
Posted - 15 Feb 2010 :  5:28:35 PM  Show Profile  Reply with Quote
Hello,

Could someone tell me the best set of plugs to use with this application. I also need to know what a good gap is to start with. Thanks...Rich

Car - 67 GTO
Heads - 1969 #062
Dist - HEI Pertronix Flame Thrower

Bill Boyle
Horse Feathers (Charter Member)

USA
1593 Posts
Posted - 15 Feb 2010 :  7:08:43 PM  Show Profile  Visit Bill Boyle's Homepage  Reply with Quote
NGK XR5 gapped at .045"
"Dedicated to keeping the classic Pontiac engine alive."
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bozo7792
Tribal Scout

2 Posts
Posted - 16 Feb 2010 :  8:05:22 PM  Show Profile  Reply with Quote
Thanks...I picked some up today...this might sound dumb but they look kinda short...they don't go down in the head as much as the AC Delco's I pulled out (R45TSX) Is this OK

Thanks for the info...Rich
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Cobrabill
Talking Dog

Aruba
1372 Posts
Posted - 17 Feb 2010 :  4:36:47 PM  Show Profile  Reply with Quote
THere's a really interesting topic posted somewhere(manufacturers website) that lists the CR and corresponding plug gap.But CRS has taken over.
Green grass & high tides forever
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screamingchief
Tribal Scout

USA
15 Posts
Posted - 02 Mar 2010 :  02:59:40 AM  Show Profile  Reply with Quote
quote:
Originally posted by bozo7792

Thanks...I picked some up today...this might sound dumb but they look kinda short...they don't go down in the head as much as the AC Delco's I pulled out (R45TSX) Is this OK

Thanks for the info...Rich

Your engine had the wrong plugs in there if you pulled out an R45TSX.

That's a late model tapered seat plug,meant for .060" gaps.

The '69 heads use a gasket seat plug,like the NGK plug Bill mentioned.

Pontiac did'nt go to the tapered seat plugs till '72 & up.

So no,the new plugs you have wont hurt anything,in fact they'll help.

That tapered seat plug was likely hanging out further into the chamber,and allowing carbon to build up on the threads and such.

HTH

Bret P.
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