all mods in sig and might spray a 50shot in the far future...also my heads are decked 15-thousandths.

i just want to try something other than the ac delco factory replacements.

whats the best of the two in YOUR opinion?

thanks
steve

 

I had the 104's in my Camaro when I had my NX kit and didn't have any problems with them.

 

No NX here but run Tr-55's no problems.....

 

I've run the autolite 104's and 103's with a 150-175 shot NX. I currently have the 103's in and ran my best NA time on them. So the cooler heat range doesn't seem to effect NA performace much at all.

 

mom and dad bought me a set of ngk tr 55's so plan to install them around lunch time today.

thanks for your time.
steve

 

The 104's are more available as the TR55's usually have be ordered.
Both seem to be working fine in many high HP engines.

Gordon
Fuel Injector Cleaning & Flow Testing
http://www.witchhunter.com

 

i changed from my ac delco factory replacment plugs which i just changed about 5,000 ago before i had my head work done...i just used the same plugs (bad idea) anyways i changed the plugs out in about an hours time, and then i checked the gap on the ac delcos that i took out all of them were .060!...i gapped all my new ngks to .048.

my car runs much smoother now. and i have a little better performance.

just thought id share it with ya,
steve