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Old Mar 12, 2009 | 03:06 PM
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Im going to be upping the shot Im running and I'm wondering if you guys think its work changing my plugs or not.

Static Compression ratio is around 10:1 and Dynamic is around 8:1 (i know...)

Car runs on 101 Sunoco Unleaded

Im currently running the Autolite 103's with good results at current power levels. Car makes a little over 400 whp on motor and Im looking at running close to 200 hp on bottle.

Do you think I should change the plugs out to the AR94's?

I'd also be interested to know what others are running for plugs and if there are any that should be avoided
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Old Mar 12, 2009 | 03:13 PM
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NGK's are easier to read and a little safer than the Autolites.

I'd start with an 8 or 9 heat range.
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Old Mar 12, 2009 | 08:08 PM
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Originally Posted by ATVracr
NGK's are easier to read and a little safer than the Autolites.

I'd start with an 8 or 9 heat range.
x2. i run a ngx heat range 9 on a 200 shot
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Old Mar 12, 2009 | 08:15 PM
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Another vote for NGK plugs
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Old Mar 12, 2009 | 08:55 PM
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I do not use alot of the autolight plugs on the LS series. I have used them in the past on other engines though. We use NGK on the LS series and for a 200 shot the best plug would probably be an number 8 plug. I use the BR7ef on the street cars we tune on a 2oo where the drivabilty is a huge factor. We are just really concervative on the timming.
Dave
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Old Mar 13, 2009 | 02:28 PM
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Thanks for the info guys! Im not running a whole lot of timing as it is so I will probably go to the 8 NGKs to start.
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Old Mar 19, 2009 | 11:52 PM
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Going out to the track on Saturday.
I picked up the NGK 7317's and im going to install them tomorrow. Just curious what gap and how much timing you guys would recommend pulling.
Im going to be running a .067 n2o jet and I have .038-.040 for the fuel jets.
i was thinking of gapping them at like .031 and pulling 4* from what im running on the current setup to start.
I'm thinking it will be right around a 190 crank hp shot, but please correct me if I'm wrong.
Also, Im pulling fuel from the fuel rail currently, which I know isnt the preferred way of doing it, and running 255 pump, am I to the point where Im going to be running out of fuel?
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