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#249144 - 09/29/05 03:18 AM Which Sparkplug..  
Joined: Mar 2004
Posts: 254
85SSMan Offline
Member
85SSMan  Offline
Member

Joined: Mar 2004
Posts: 254
Wichita, Kansas
I did a TPI swap a while back. I Cant figure out which plugs I should use, the original plugs for the "G" block (.045 gap), or the plugs for the TPI block (.035 gap). I have the stock "G" block, with a TPI top end. The plugs for the "G" block seem to run a little smoother, but the engine surges sometimes at idle. The plugs for the TPI block runs a little worse, but always Idles perfect. ?????????

Thanks
Chris



1985 Monte SS, Rebuilt L69 with TPI. 200-4R Tranny. 951 Modine with TPI duel fans. True 2 1/4 Flowmaster Duals. B.F.H. made dual hump crossmember. Stock Suspension, interior, and body.
SOLD TO INTMDATR3 ON 03/04/06
#249145 - 09/29/05 07:12 AM Re: Which Sparkplug..  
Joined: Jul 2005
Posts: 56
BQuick Offline
Member
BQuick  Offline
Member

Joined: Jul 2005
Posts: 56
Northern Virginia
Chris, I checked from 85-86 5.0L IROC gap should be .045...5.7L IROC 87 is .035
I have always used Autolite,(trouble free) and use to believe in, ahhhh all you need is fire... what diff does it make... after reading http://www.autolite.com/framer.cgi?page=http://ww....com/products/platpro.htm

and viewing photos, there is a diffrence of how a plug performs.
http://www.autolite.com/products/xp/Kernel%20Compare.jpg
im sold on these "Autolite XP Xtreme Performance Spark Plug"


1 9 8 7 M O N T E C A R L O SS
#249146 - 10/01/05 12:35 AM Re: Which Sparkplug..  
Joined: Mar 2004
Posts: 254
85SSMan Offline
Member
85SSMan  Offline
Member

Joined: Mar 2004
Posts: 254
Wichita, Kansas
My TPI is an 88' model, I am using autolite plugs at the moment. I spent some time doing some tuning tonight and it seems to running alot better now.

Chris



1985 Monte SS, Rebuilt L69 with TPI. 200-4R Tranny. 951 Modine with TPI duel fans. True 2 1/4 Flowmaster Duals. B.F.H. made dual hump crossmember. Stock Suspension, interior, and body.
SOLD TO INTMDATR3 ON 03/04/06

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