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.
Iâ??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@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@comcast.net>
> Sent: Wednesday, June 7, 2023 8:35 AM
> To: dave northrup <dave@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@ranteer.com> wrote:
>>
>> are
>
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