Best plug for LT-1

[Dan Fahey]

Originally Posted by John Nechiporchik

Dan, Advantages??

These are my observations using Bosche 4 Prong plugs.
My engine is an Iron Head LT-1 and many of our Impala and Vette Bloggers have had zero problems.
Some go back to copper plugs and work fine until the tip wears out.
Blower or Turbo guys use just about all of them with good success and have their preferred set ups.

My experience is that Bosche Platinum last forever...though 4 prong more expensive.
Use them on all my cars and look perfect every time they are checked.
Our Impala guys retrofit the GM 8 Coil LCCC from the LSx Series to get rid of the Opti and add Accel or MSD Coils.
I have just the one MDS Coil replacing the Stock one and carry extra Opti Harness.

The 4 Prongs are spaced perfectly apart which attract a clean Spark.
Prongs are vertical and should reduce flow restriction over a L shaped Prong.
Never had to index them for better performance.
OR
Drill a Hole in the Tip like on a L-shaped Prong to prevent blow out..

Bosche makes a 2 Prong..
Figure 4 prong reduces a touch of combustion chamber volume.


D