Spark Plug and gap recommmendation 73.5 CIS

[rching]

I've come across several numbers and gap sizes for my 73.5' 2.4 with CIS. Stock with under 100K miles. NGK, Bosch, .022, .024,.028, ? WR5DP, W5CC, WR7CC, BP5, BP6, BP8 ES???? TIA

[RoninLB]

if a Bosch CD unit use stock factory plug gap as per its design

the CIS should run BPR7ES or BPR8ES clean imho.



ps: NGK

[rching]

The factory manual says .022 for a plug gap. What about that?

[Sunroof]

.022 yep.

Forget about the Bosch copper plugs. I bought everyone left in the western hemisphere and that was only seven of 'em!!!!!!!!!!!!!!!!

Look at NGK.

Bob
73.5T in Sepia of course

[rching]

Thanks for the suggestions. Anything different if Permatune replaces the Bosch unit?

[RoninLB]

i never followed what gap Permatune can tolerate so i just set them to "76/77 Tehnical Specifications" booklet Bosch specs of .028" as some 1977 came with factory old model Permatunes like mine

and according to a local pope the ideal gap for our combustion chambers etc is .040" which i use now with the MSD

some members use larger than stock gaps with Bosch and Permatunes

[rching]

Thanks for all the input!