Where's intake valve in relations to plug? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Thread Tools Search this Thread
Old 07-10-2006, 07:42 PM   #11
Senior Member
Posts like a Corvette
Join Date: Jul 2004
Location: Bolingbrook, IL Location: Clarkston, MI
Posts: 1,256
Thanks: 0
Thanked 0 Times in 0 Posts
llBlazin_llLo is on a distinguished road

If you want to do something to the plugs to help - round off the corners on the end of the grounds - this will eliminate hot spots. Also keep opening the gap until you get misfires and then tighten them up.

I've done both of these things to my car and made a nice little difference KR wise.
llBlazin_llLo is offline   Reply With Quote
Old 07-10-2006, 10:01 PM   #12
Senior Member
Posts like a 4 Banger
Join Date: Mar 2005
Location: Appleton, WI
Posts: 124
Thanks: 0
Thanked 0 Times in 0 Posts
2seater is on a distinguished road

Indexing spark plugs is an old racer trick. The conventional wisdom is to face the opening of the plug at the exhaust valve, not the intake. The idea being to start the burn in the potentially hottest part of the combustion chamber, thereby lessening the potential for two flame fronts in the chamber. Shims in various thicknesses are available from Jeg'* summit and others. It can be a tedious process to try various plugs in the cylinders to see if a shim is required or not. Knocking the corners off of a conventioanal plug are also a good idea as mentioned.
2seater is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Purge valve solenoid or egr valve? SEXI SADI GMC/Chevrolet Truck/SUV 5 03-28-2012 12:18 PM
Intake air temp (IAT) plug test Danthurs Trouble shooting + Test Procedures 0 10-02-2009 12:36 PM
pre series intake or early tunned port intake best for turbo markviiisvt4 Performance, Brainstorming & Tuning 10 01-03-2006 12:46 PM
What's this plug in my trunk? CD changer plug I hope?!?!?!? 02-SLE 2000-2005 3 09-07-2005 10:16 AM
Need Plug Wire Part Number and NGK Plug Part Number!! josho66 2000-2005 11 05-29-2005 01:06 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 01:03 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.