Here's what happens when you run AC R43's
07-19-2011, 07:15 PM
#43
I have a 63swc with 340 hp, 4 speed manual. Presently have 45R plugs with enough mileage to consider plug change. Question: Some time ago Corvette America filled an order for this car with 43R plugs. Can My short haul driving (no long trips) replace the 45s with those 43s? I want to avoid pulling present plug if not necessary. Your comments appreciated. Regards, Abe G
http://parts-catalog.acdelco.com/cat...&parttype=3210
http://parts-catalog.acdelco.com/cat...nterchange.php
07-19-2011, 07:22 PM
#44
Le Mans Master
07-19-2011, 07:27 PM
#45
07-19-2011, 08:45 PM
#46
Team Owner
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes
on
1,398 Posts
07-19-2011, 08:54 PM
#47
Le Mans Master
04-26-2014, 03:52 PM
#50
Team Owner
Member Since: Oct 2000
Location: Washington Michigan
Posts: 38,899
Received 1,856 Likes
on
1,099 Posts
04-26-2014, 05:26 PM
#51
Team Owner
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes
on
1,398 Posts
04-26-2014, 08:03 PM
#52
Team Owner
I have run these with some special prep!
Not in a stock engine, but they (AC 43's) did Ok, after I filed the tips back to open up the spark exposure (side gapped) and tapered the point somewhat, stretched the gap to .42 and indexed them in the heads all because of the MSD 6L boxes and the tall MSD coil. Just got to know what you are working with! I was personally liking the quality of the Autolite 202's and NGK plugs for old school running! But sometimes the store has what the store has, and I was less prone to wait around for special orders! My opinion nowadays is no one should be running an old school plug anymore, unless you are just ignorant!
Maybe if you want some throw away plugs that are far cheaper to work on your tuning, then get some of this stuff and refine your tune, balance it all out with some trial and era going thru a few sets, but then throw them in the trash and get the modern stuff!
PS and that was on the Streets!
Got to know what you are doing! 
Maybe if you want some throw away plugs that are far cheaper to work on your tuning, then get some of this stuff and refine your tune, balance it all out with some trial and era going thru a few sets, but then throw them in the trash and get the modern stuff!
PS and that was on the Streets!
Got to know what you are doing!
Last edited by TCracingCA; 04-26-2014 at 08:09 PM.
