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Old 01-23-2014, 09:28 AM   #1
colgad
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Join Date: Jun 2006
Location: Lutz, Florida
Posts: 838
Spark Plug Information

While looking for spark plugs for my Vortec heads I ran into this AC chart and thought I would share. I had been using to short a plug in mine and found that the Vortec heads (iron) need the LTS style.

R - Resistor

4- 14mm thread

3- heat range

LT - Long reach, .715" (18.16 mm), Tapered Seat

T - Tapered Seat Shell Design

TS - Tapered seat with extended tip

LTS is a long reach tapered seat plug with a extended tip.

TS it a tapered seat plug with a extended tip.
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1955 Red-Cream, Chevrolet Nomad, restoration on hold
2004 Black, Corvette Z06 LS6 convertible (Rock solid Fun) 2011/2018 Power Tour
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