SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: SLCKREG on March 05, 2008, 07:52:03 PM

Title: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: SLCKREG on March 05, 2008, 07:52:03 PM

I'm thinkin about going hei, how would I find out the correct plug to run . I know that s a loaded question , but I'm not talkin about heat range ,or gap, or reach, just #'? I've been runnin a ngk v plug ,always had pretty good luck with them........ anyway help.

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: Luckie Stiff on March 05, 2008, 07:56:29 PM

good question, I've never thought about it but is there a "good" plug for HEI?

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: hotrod56cars on March 05, 2008, 08:26:29 PM

I used A/C Delco R44XLS gapped at 45

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: SLCKREG on March 06, 2008, 07:22:12 PM

Rod that sounds like the plug I'm runnin in my suburban.  Is there a plug expert in the house?

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: hotrod56cars on March 06, 2008, 11:58:59 PM

Quote from: SLCKREG on March 06, 2008, 07:22:12 PM

Rod that sounds like the plug I'm runnin in my suburban.  Is there a plug expert in the house?

Probably is. Not me. That's what i used soooo...

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: crewchief22 on March 07, 2008, 05:51:51 AM

Unless you know someone running nearly the same setup that can give you a solid recommendation, you need to start with a very standard spark plug.  Then learn how to read spark plugs and replace as needed.  The 44 heat range in AC plugs are going to be very close.  I agree with the .045 gap with the HEI.  Also watch your timing closely, total of 32-33 max until you get your plugs sorted out.

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: crewchief22 on March 07, 2008, 07:01:29 AM

Hope this helps with reading spark plugs.

http://www.dragstuff.com/

Look under racing articles, spark plug reading 101

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: SLCKREG on March 07, 2008, 07:34:08 AM

Thanks guys, yeh I was hoping someone on here was running a hei/bbc set up.

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: hotrod56cars on March 07, 2008, 08:50:57 AM

Quote from: SLCKREG on March 07, 2008, 07:34:08 AM

Thanks guys, yeh I was hoping someone on here was running a hei/bbc set up.

I was.

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: SLCKREG on March 07, 2008, 09:03:11 AM

Kewl, thanks Rod, after I typed that last post I remember seeing Tom had an hei in one of his boats, or should I say a dui, (davis unified ign.) Maybe I'll ask him as well, I've had such good luck with ngk's I'd like to stick with them if I can figure out what one they recomend. :banghead:

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: CHROMEY on March 07, 2008, 09:12:07 AM

you could always cross reference the a/c ## to your ngk using a spark plug book?

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: Marcsrollin on March 07, 2008, 09:14:51 AM

Personally I run the Accell 8198's cause they are the header plugs and they are gapped at .050. I am running the MSD set up not the HEI set up , but they should be fairly close.

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: Josh@JBP on March 07, 2008, 11:26:51 AM

Arent you running the Brodix Aluminum heads?   I'd try giving them a call they should be able to give you a real good baseline.

Title: Re: SPARK PLUGS/ SWITCHIN IGNITIONS
Post by: SLCKREG on March 07, 2008, 11:46:23 AM

Thanks Josh, that's prolly a good idea, I know I need tapered seats , and the x-tra long reach, or whatever thats called.