What spark plug #?....

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Aug 22, 2008 | 07:21 PM

corvett66

Thread Starter

Racer

Joined: Feb 2002

Posts: 287

Likes: 27

From: Loveland CO

What spark plug #?....

Time for some new plugs for my 1966 - 327/300.
The last time I got some I had a hard time finding some that would fit.
I had to get some Champion small engine plugs. That's all the parts store showed for it.
What is available now that will work?

Aug 22, 2008 | 07:24 PM

rongold

Drifting

Joined: Jul 2005

Posts: 1,977

Likes: 195

From: Putnam Valley, New York. Amateur Radio Operator K2NS

Spark plugs

AC R45S is the most popular plug for your engine.

RON

Aug 22, 2008 | 07:47 PM

muncieman

Burning Brakes

Joined: Aug 2001

Posts: 1,104

Likes: 1

From: Frederick Md

Headers??

Quote:

Originally Posted by corvett66

You have headers on the motor????

Aug 22, 2008 | 08:11 PM

corvett66

Thread Starter

Racer

Joined: Feb 2002

Posts: 287

Likes: 27

From: Loveland CO

Quote:

You have headers on the motor????

No headers. Just the stock cast iron manifolds.
It is a Calif. A.I.R. car so I have the tubes coming out of the manifolds.

Aug 23, 2008 | 09:33 AM

Donald #31176

Melting Slicks

Joined: Jul 2004

Posts: 2,868

Likes: 196

From: Maryland

For stop n go driving any heat range "5" 3/8 reach 14 MM thread Non tapered plug.

AC R45, R45S
Denso W-14-U, W-14P-U
NGK B-4

Last edited by Donald #31176; Aug 23, 2008 at 10:56 AM.

Aug 23, 2008 | 10:45 AM

corvett66

Thread Starter

Racer

Joined: Feb 2002

Posts: 287

Likes: 27

From: Loveland CO

I went to the AC Delco website and they showed the R43 for 300 hp engines and the R45S for 250 and 275 hp engines.
What's the difference between the two?