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Tech Talk => Engine Mechanical / Electrical => Topic started by: 69kona on February 24, 2016, 07:25:58 PM

Title: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 07:25:58 PM

At what point do I need non projected plugs ? I'm hitting a 120 shot are the stock plugs ok?


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Title: Re: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 07:29:54 PM

Not the best pic but here is a plug pic


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Title: Re: Nitrous and spark plugs
Post by: GT Jets on February 24, 2016, 07:31:39 PM

What plug number and motor?

I don't run extended tip plugs in anything.

Title: Re: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 07:38:43 PM

Acdelco R45s , 455 olds.. Should I ditch the plugs and put Ngks?


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Title: Re: Nitrous and spark plugs
Post by: GT Jets on February 24, 2016, 07:42:47 PM

Quote from: 69kona on February 24, 2016, 07:38:43 PM

Acdelco R45s , 455 olds.. Should I ditch the plugs and put Ngks?


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What ignition system?

I personally would opt for an R45 gapped at. 035"

GT

Title: Re: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 07:47:24 PM

Pertronix..


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Title: Re: Nitrous and spark plugs
Post by: GT Jets on February 24, 2016, 07:49:06 PM

Quote from: 69kona on February 24, 2016, 07:47:24 PM

Pertronix..


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Still an R45 at. 035".

GT

Title: Re: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 07:50:20 PM

Thanks Gt ...


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Title: Re: Nitrous and spark plugs
Post by: jyeager on February 24, 2016, 08:10:18 PM

Throw fresh plugs in and re evaluate. Can't even tell where the timing marks are.
But I would say similar to what gt says. I gap a little bit tighter.

How much timing are you pulling for the nitrous shot?


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Title: Re: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 08:23:40 PM

120shot pulling 6 * of timiming


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Title: Re: Nitrous and spark plugs
Post by: 69kona on February 24, 2016, 09:34:23 PM

Here's another picture


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Title: Re: Nitrous and spark plugs
Post by: jyeager on February 24, 2016, 09:58:04 PM

Quote from: 69kona on February 24, 2016, 09:34:23 PM

Here's another picture


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looks like a lot of run time on those plugs.
Honestly, it's hard to say with that much carbon on the plugs. Throw new plugs in it and make a pass. Check and re assess. 
6 degrees mite be a little fat. I mite try 5 with 6 and an 1/8th flowing fuel pressure.


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Title: Re: Nitrous and spark plugs
Post by: GT Jets on February 24, 2016, 10:29:37 PM

Quote from: jyeager on February 24, 2016, 09:58:04 PM

looks like a lot of run time on those plugs.
Honestly, it's hard to say with that much carbon on the plugs. Throw new plugs in it and make a pass. Check and re assess. 
6 degrees mite be a little fat. I mite try 5 with 6 and an 1/8th flowing fuel pressure.


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Well there you go.

Also want to add. That plug was gapped incorrectly.

The ground strap should be as parallel as possible to the center electrode.

I would not exceed .032-.035". The ground strap should be bent at the radius to obtain proper gap,  not bent at the base of the plug. This can weaken the ground strap causing it to break off.

GT

Title: Re: Nitrous and spark plugs
Post by: steves86ta on February 25, 2016, 08:41:18 AM

he had a slight bit of speckling on the plug. I think a new set and pull them after a run and re-ascess

But need to also spike the fuel a little bit too.

Title: Re: Nitrous and spark plugs
Post by: 69kona on February 25, 2016, 12:20:44 PM

Yeah I'm gonna put new plugs..but why aren't I getting a timing mark on the top strap ?


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Title: Re: Nitrous and spark plugs
Post by: steves86ta on February 25, 2016, 12:23:14 PM

looks like they just had to much run time on them to see it

heres a good pic i found

(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.crankshaftcoalition.com%2Fwiki%2Fimages%2F4%2F46%2FHow_to_read_spark_plugs10.jpg&hash=ba1cc4c61115fe753315b45d7d8777db8359f145)

Title: Re: Nitrous and spark plugs
Post by: jyeager on February 25, 2016, 12:47:16 PM

Quote from: 69kona on February 25, 2016, 12:20:44 PM

Yeah I'm gonna put new plugs..but why aren't I getting a timing mark on the top strap ?


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Too much run time on the plugs.




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Title: Re: Nitrous and spark plugs
Post by: 69kona on February 26, 2016, 06:47:04 AM

I picked up 2 sets of plugs .. Gonna do a couple bottle passes after boat and car show at Jacksmith..


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Title: Re: Nitrous and spark plugs
Post by: vwagon13 on February 26, 2016, 09:26:41 AM

Quote from: steves86ta on February 25, 2016, 12:23:14 PM

looks like they just had to much run time on them to see it

heres a good pic i found

(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.crankshaftcoalition.com%2Fwiki%2Fimages%2F4%2F46%2FHow_to_read_spark_plugs10.jpg&hash=ba1cc4c61115fe753315b45d7d8777db8359f145)

Thanks for pic,good info(http://👍)

Title: Re: Nitrous and spark plugs
Post by: 69kona on February 28, 2016, 02:33:57 PM

What u guys think ?


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Title: Re: Nitrous and spark plugs
Post by: GT Jets on February 28, 2016, 02:47:25 PM

Quote from: 69kona on February 28, 2016, 02:33:57 PM

What u guys think ?


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Can you get a closer picture from the side?

GT

Title: Re: Nitrous and spark plugs
Post by: jyeager on February 28, 2016, 09:26:38 PM

Quote from: 69kona on February 28, 2016, 02:33:57 PM

What u guys think ?


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For a river set up? Looks great. I would say it may be a little on the fat side, but I would leave it alone.


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Title: Re: Nitrous and spark plugs
Post by: 69kona on February 29, 2016, 06:21:11 AM

Quote from: jyeager on February 28, 2016, 09:26:38 PM

For a river set up? Looks great. I would say it may be a little on the fat side, but I would leave it alone.


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Thank you much appreciated 👍


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Title: Re: Nitrous and spark plugs
Post by: 69kona on February 29, 2016, 06:21:38 AM

River set up


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