angle or straight plug heads
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Instructor
Joined: Nov 2006
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From: fairfax va
angle or straight plug heads
im starting a fresh motor build for my 1980 vette and want to know the best plug style straight or angle? i was looking to afr but it seems all there heads come angle?why? they said straights r custom order.my current setup is straight and they work with my headers. please explain pro and cons thanks
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
My understanding is that angle plug heads might have a slight performance advantage (but minimal). However, some type of headers don't work too well with angle plugs (i.e. Hooker sidepipe headers)...
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From: Butler Pa
Team Owner
Joined: Jul 2001
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
That number 2 plug will be awfully close to the header pipe... I have ZZ4 heads on my yellow '68 and the #1 plug is way too close to the pipe.. It works but I'm not too comfortable about that.. I might go with shorty spark plugs..
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
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From: Sorrento Italy
Team Owner
Joined: Jul 2001
Posts: 182,997
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Here's what I'm using:
Brand: NGK Spark Plugs
Product Line: NGK Racing Spark Plugs
Shorty Spark Plug: No
Resistor: No
Manufacturer Heat Range: 8
Electrode Core Material: Copper
Electrode Tip Material: Nickel alloy
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
NGK Part Number: R5672A-8
Thread Starter
Instructor
Joined: Nov 2006
Posts: 232
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From: fairfax va
with all the wait time for afr i will probably go dart unless someone makes a good argument to wait. been batteling in my head about 383vs 406. tell me if im right 383=200cc 406=215cc generally speaking for limited street/strip.
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
My first 383 had Dart pro 1 215 CC with the optional 2.08/1.625 valves with the factory porting. They were actually 221 cc as I got them.
It was good running motor with a solid roller. Of course it need more so I upped the cam duration and installed the dart 227 cc heads. I'm still driving it today like that today with a 5 speed.
I would use 200+cc on 383's
It was good running motor with a solid roller. Of course it need more so I upped the cam duration and installed the dart 227 cc heads. I'm still driving it today like that today with a 5 speed.
I would use 200+cc on 383's
