Dart Pro 1 users or spark plug experts inside please
10-31-2006, 03:23 PM
#1
Melting Slicks
Thread Starter
Dart Pro 1 users or spark plug experts inside please
Which spark plugs are you guys using with your Dart Pro 1 alum heads? The plugs Dart recommends are the Autolite AR3933 but these are not resistor plugs. I know I need a resistor type plug w/ .750 reach, 5/8 hex head, 14mm threads but I don't know the heat range I should use. Oh yeah and I'm looking for a Champion plug because of header clearance. So far I came up with Champion # RC12YC. Am I on the right track?
10-31-2006, 05:00 PM
#3
Melting Slicks
Thread Starter
Originally Posted by BTTB
Was using champion 12yc---switched to nkg r5671a. engine builder recomended this change. The nkg are one range colder.: Ran strong with both sets.
11-01-2006, 12:53 PM
#8
Le Mans Master
Member Since: Apr 2005
Location: Scarborough ONTARIO
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Gone through Acd rapid fire it good but i think way too hot for summer time, NGK 5151 again too hot, finally went with NGK 7373 (FR5) this i found the best plugs so far on mine.
11-01-2006, 02:52 PM
#9
Race Director
Originally Posted by USAsOnlyWay
acc-0416s
Accell shorty plugProduct Description
Spark Plug, Shorty, U-Groove, Flat Seat, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each --- ** Shorty Spark Plug: Yes ** Resistor: Yes ** Manufacturer Heat Range: S ** Electrode Core Material: Copper ** Electrode Tip Material: Copper ** Insulator Type: Projected ** Spark Plug Thread Size: 14mm ** Spark Plug Reach: 0.750 in. ** Spark Plug Seat Style: Gasket ** Wrench Diameter: 5/8 in. ** Ground Strap Quantity: One ** Quantity: Sold individually.
http://store.summitracing.com/partde...5&autoview=sku
11-01-2006, 06:37 PM
#10
Melting Slicks
Thread Starter
I hate accel plugs with their screw-on terminals. I just don't trust that concept. Last set I pulled, the terminals were so loose they nearly fell off 
11-02-2006, 07:16 AM
#11
Race Director
Originally Posted by NUckINg FuTS
I hate accel plugs with their screw-on terminals. I just don't trust that concept. Last set I pulled, the terminals were so loose they nearly fell off
I put the terminal end in my vice, then put a wrench on the hex, and snugged them tight, no issues.
