C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

what spark plugs

Thread Tools
 
Search this Thread
 
Old Jun 10, 2005 | 12:47 AM
  #1  
gator79's Avatar
gator79
Thread Starter
Safety Car
15 Year Member
 
Joined: May 2005
Posts: 4,176
Likes: 7
From: Jennings LA
Default what spark plugs

what is the best plugs to run in my 350? compression is 9.8 to 1, headers and 280 duration 460 lift camshaft. the heads are old fuelie/ camel hump heads from a 65 model. thanks
Reply
Old Jun 10, 2005 | 11:30 AM
  #2  
71redskin's Avatar
71redskin
Burning Brakes
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2005
Posts: 977
Likes: 1
From: wash. dc
Default what spark plugs

at the tuning for beer in va. that question came up to lars, and he told us that the regular ac delco plug that goes in the cars actually is better than these new platinum plugs. under high pressure the platinum loses its spark b4 the tried and true plugs did.
Reply
Old Jun 10, 2005 | 11:46 AM
  #3  
Buzzardz_vette's Avatar
Buzzardz_vette
Melting Slicks
Supporting Lifetime Gold
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Apr 2005
Posts: 2,045
Likes: 4
From: Yorktown VA
NCM Sinkhole Donor
Default

Originally Posted by 71redskin
at the tuning for beer in va. that question came up to lars, and he told us that the regular ac delco plug that goes in the cars actually is better than these new platinum plugs. under high pressure the platinum loses its spark b4 the tried and true plugs did.
Is this true for all C3s? I have a 76.
Reply
Old Jun 10, 2005 | 01:52 PM
  #4  
gator79's Avatar
gator79
Thread Starter
Safety Car
15 Year Member
 
Joined: May 2005
Posts: 4,176
Likes: 7
From: Jennings LA
Default

my car is a 81 I changed the heads and put some 1965 model, 461 camel hump heads on it, the 81 heads had the small 5/8 spark plugs and the 65 heads had larger 13/16 spark plugs in it. maybe the threads are the same, I will have to check
Reply
Old Jun 10, 2005 | 03:56 PM
  #5  
stingry's Avatar
stingry
Drifting
15 Year Member
 
Joined: Mar 2003
Posts: 1,608
Likes: 3
From: Canberra AUSTRALIA
St. Jude Donor '05-'06
Default

Lars told me the same thing DELCO or AUTOLITES. I went out and bought the Autolites (el cheapos from NAPA) and the car has never run better.
Reply
Old Jun 10, 2005 | 05:25 PM
  #6  
kevinator80's Avatar
kevinator80
Drifting
10 Year Member
 
Joined: Oct 2004
Posts: 1,496
Likes: 1
From: Lafayette Louisiana
Default

Hi Mark, Make sure they have the sealing ring on the plugs. That was the only thing my builder told me to be sure of. The plugs in the heads were for a 66 327 engine if memory serves me right.
Reply

Get notified of new replies

To what spark plugs





All times are GMT -4. The time now is 10:03 AM.

story-0
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-1
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-2
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-3
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-4
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-5
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-6
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-7
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-8
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-9
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE