PLUG READING FOR A NITROUS MOTOR

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Chevyfireball
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Location: Napier, New Zealand

Re: PLUG READING FOR A NITROUS MOTOR

#91 Post by Chevyfireball » Wed Jun 24, 2009 1:06 am

The 632 is a Wilkerson race engine from AL. 14.5:1 compression. It has 18* Aluminum Dart Heads. I run C16 gas
Jesel roller rockers.
Pistons: J+E Nitrous. Speedpro Rings
Titanium Valves, triple valve springs
Int: 2.400 Exh: 1.900
Crank: Crower 4.750 stroke
Connecting Rods: BME 426 Aluminium 6.650”
Cam: Bullet 820 lift
Lifters: Bullet Roller Lifters
Pushrods: Smith Bros.
Lubrication: Four Stage Dry Sump Oil Pump
Carburettors:
Twin Chuck Nuytten 1050cfm Dominators flowing
1220cfm each.
Front mount Jesel Dist
MSD Crank Trigger.
2 Speedtech foggers.
'It Ain't Over Til It's NOVA'

71Hellride
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Joined: Sat May 30, 2009 7:35 pm

Re: PLUG READING FOR A NITROUS MOTOR

#92 Post by 71Hellride » Wed Jun 24, 2009 10:16 pm

That's a hell of a motor man. Have you ever burnt the straps off any of your plugs? Just seems like alot more timing that other 18 degree motors run. 700 hp is a pretty good hit with -8 plugs and c-16 gas. I would use 10's if not even going to 11's. I run 10's in my motor. If the 10's did look nasty rich in your motor I would say your tune up is rich. All that extra fuel might be why your getting away with that much timing.

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Chevyfireball
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Re: PLUG READING FOR A NITROUS MOTOR

#93 Post by Chevyfireball » Thu Jun 25, 2009 2:20 am

71Hellride wrote:That's a hell of a motor man. Have you ever burnt the straps off any of your plugs? Just seems like alot more timing that other 18 degree motors run. 700 hp is a pretty good hit with -8 plugs and c-16 gas. I would use 10's if not even going to 11's. I run 10's in my motor. If the 10's did look nasty rich in your motor I would say your tune up is rich. All that extra fuel might be why your getting away with that much timing.
I'm currently running -9's not -8's. I'm going to go back to 10's and try and get the tune up right.
Its run a best of 6.84 at 198mph on a really cold track and I think there's a bit more left.
'It Ain't Over Til It's NOVA'

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wikd69
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Re: PLUG READING FOR A NITROUS MOTOR

#94 Post by wikd69 » Thu Jun 25, 2009 9:07 am

Chevyfireball wrote:The 632 is a Wilkerson race engine from AL. 14.5:1 compression. It has 18* Aluminum Dart Heads. I run C16 gas
Jesel roller rockers.
Pistons: J+E Nitrous. Speedpro Rings
Titanium Valves, triple valve springs
Int: 2.400 Exh: 1.900
Crank: Crower 4.750 stroke
Connecting Rods: BME 426 Aluminium 6.650”
Cam: Bullet 820 lift
Lifters: Bullet Roller Lifters
Pushrods: Smith Bros.
Lubrication: Four Stage Dry Sump Oil Pump
Carburettors:
Twin Chuck Nuytten 1050cfm Dominators flowing
1220cfm each.
Front mount Jesel Dist
MSD Crank Trigger.
2 Speedtech foggers.
geez louise, that thing is a rocket !!!!

Nice build :-)
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

71Hellride
Posts: 80
Joined: Sat May 30, 2009 7:35 pm

Re: PLUG READING FOR A NITROUS MOTOR

#95 Post by 71Hellride » Sun Jun 28, 2009 9:28 pm

Chevyfireball wrote:
71Hellride wrote:That's a hell of a motor man. Have you ever burnt the straps off any of your plugs? Just seems like alot more timing that other 18 degree motors run. 700 hp is a pretty good hit with -8 plugs and c-16 gas. I would use 10's if not even going to 11's. I run 10's in my motor. If the 10's did look nasty rich in your motor I would say your tune up is rich. All that extra fuel might be why your getting away with that much timing.
I'm currently running -9's not -8's. I'm going to go back to 10's and try and get the tune up right.
Its run a best of 6.84 at 198mph on a really cold track and I think there's a bit more left.
Oh sorry about that, I need to read more closely. Sounds like it’s moving on pretty good man, good luck with her.

soslojoe1970
Posts: 67
Joined: Wed Apr 08, 2009 5:43 am

Re: PLUG READING FOR A NITROUS MOTOR

#96 Post by soslojoe1970 » Mon Jun 29, 2009 4:17 pm

Where does an autolite 3932 racing plug with cutback electrod rank. Think you guys are running ngk's? Ngk a better plug?

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Chevyfireball
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Location: Napier, New Zealand

Re: PLUG READING FOR A NITROUS MOTOR

#97 Post by Chevyfireball » Mon Jun 29, 2009 5:06 pm

I have been running those autolites. They worked fine but I'm told NGK's are easier to read. I noticed when comparing the two that the Autolite seems to have a wider ground strap. Other than that they look the same.
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71Hellride
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Re: PLUG READING FOR A NITROUS MOTOR

#98 Post by 71Hellride » Mon Jun 29, 2009 7:37 pm

ar3932 is the same as a ngk -10. Because autolites have the really think ground strap they are hard to burn off. If you burn an autolite, you probably got a ring. Ngk's provide a "fuse" with the weaker strap. Ngk are also easier to read. I always run ngk's, and luckily have never burned a strap.

mrmmustang
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Re: PLUG READING FOR A NITROUS MOTOR

#99 Post by mrmmustang » Mon Jul 20, 2009 8:09 am

Hi guys new here, 1st off i would like to say that i really like this site,

I have spent most of the day looking over the posts on reading plugs, I would like for you guys to take a look at this plug and tell me what you see. This is not a nitrous motor

N/A SBF 446 cu 13:5/1 COMP RUNNING ON RENEGADE 114

i couldnot shut it down after the run so it has idle time on it, the engine is very rich at idle i had to wipe the plug down so that we could get a look at the fuel ring. (dont pay any attention to the smudges, they were not there at the end of the run that was caused by me wiping off the sut )
also let me say this when at the track i would bring the car back to the pits and pull a plug and it was extremely clean there didnt appear to be any detenation. the porcelin was very white and cleanhttp://s664.photobucket.com/albums/vv6/ ... g&newest=1

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John_Heard
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Re: PLUG READING FOR A NITROUS MOTOR

#100 Post by John_Heard » Tue Aug 05, 2014 8:30 am

Bump - we haven't talked about plugs for a while, anyone got anything interesting to look at?

mstearman
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Re: PLUG READING FOR A NITROUS MOTOR

#101 Post by mstearman » Mon Dec 08, 2014 10:38 pm

Supercharged sbc, 10lbs boost, intercooled, efi. NGK TR6. What do you think?
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mstearman
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Re: PLUG READING FOR A NITROUS MOTOR

#102 Post by mstearman » Mon Dec 08, 2014 10:41 pm

Another view
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mstearman
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Re: PLUG READING FOR A NITROUS MOTOR

#103 Post by mstearman » Mon Dec 08, 2014 10:45 pm

Porcelain closup
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Re: PLUG READING FOR A NITROUS MOTOR

#104 Post by John_Heard » Tue Dec 09, 2014 6:41 am

I'm not too familiar with that TR6 plug, I can see it's a projected tip and hot heat range which would explain why the top part of the porcelain is white, but your pictures don't show the inside of the plug to tell if where you're at fuel wise. Do you have any pics of it cut away so we can see down inside at the base of the porcelain?

What were the conditions on this plug? One pass? Towed to the lanes and back? Pump gas/race fuel? There's not much heat showing at the base of the plug yet, so doesn't really appear that it's overtimed but you do have some light speckles it looks like.

mstearman
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Re: PLUG READING FOR A NITROUS MOTOR

#105 Post by mstearman » Tue Dec 09, 2014 12:07 pm

Street driven vehicle. New plugs with some idle, cruse. Made a few hard runs, then drove back to the garage and pulled the plug out. 91 pump gas. Going to take it to a chassis dyno later this week, so I will try to stut it off st the end of a pull and check them.

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