[6pack] [TR] Spark Plug Heat Range

[Rochlin Robert]

	I appreciate all the great feedback on my question about spark plug heat range options.  It seems that if I want to incrementally go to a cooler (or hotter) plug then NGK seems be the way to go.  Champions  are unavailable in a number of heat ranges and the information on their web site is confusing.
	I’ve spent a lot of time this Spring doing unexpected work on the 6 including suspension work and fuel delivery issues.  All that is now sorted and my plan is to spend some quality cruising time this afternoon. 
	Happy Motoring.
	Bob

> On Jun 7, 2023, at 10:18 AM, dave northrup <dave at ranteer.com> wrote:
> 
> I would suggest that first you advance the timing.  You no longer have a stock engine and therefore should not rely on the stock timing.  
> 
> Some of my old time mechanic friends have suggested that with these cars you should advance the timing until it pings, then back it off a bit.  Just a suggestion.
> 
> Also - do you still have the carbon cannister?  That's actually a source of air when you turn the engine off and could be part of the problem.  our car runs better without it.  just eliminate the branch that goes to it.  but be careful about the pipe that goes back to the gas tank.  That has to be free and clear or your engine will quit running due to fuel starvation because air is not coming in to replace the gasoline that is going out.  you can just leave the pipe that comes from the back; tie it down and leave it open.  And you won't get a gas smell in the garage.
> 
> Failing that, I would recommend talking to Richard Good.  He is very knowledgeable and happy to talk to a customer.
> 
> We did what you did, with the GP mild cam, triple carbs, lightened flywheel, polished, ported, and shaved head, decked block, etc., etc.  we are running about 11 to 1 compression.  Our timing is pretty advanced; never use a timing light.  We don't have a problem with dieseling.  I'm not sure I'm the one to solve the problem for you  but it just seems wrong to me that you are having this problem; I don't think it's the plugs.
> 
> -----Original Message-----
> From: Robert Rochlin <rrochlin at comcast.net> 
> Sent: Wednesday, June 7, 2023 8:35 AM
> To: dave northrup <dave at ranteer.com>
> Subject: Re: [TR] [6pack] Spark Plug Heat Range
> 
> Hi Dave
>  Very occasionally my car diesels when I shut down.  I rebuilt the engine a few years ago increasing the compression and putting in a Goodparts cam.  The timing is spot on and the car runs great. My reasoning is that a bit colder plug may eliminate the hot spot source of the occasional dieseling.   
> Best,
> Bob
> Sent from my iPhone
> 
>> On Jun 7, 2023, at 9:24 AM, dave northrup <dave at ranteer.com> wrote:
>> 
>> are
>