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Old 01-08-2010, 07:21 PM   #1
red5.0
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Default BBC spark plug recommendations?

Asking for a friend.

He has a 10:1 496 bbc with some Dart Pro1 345. Pistons are some basic Keith Black forged with a small dome. Engine is going in a 1972 4x4 chevy pickup. It is a 4 wheeling toy.

What would be a good starting point for a plug? If any other info is needed on the combo I will get it.
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Old 01-08-2010, 11:24 PM   #2
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Default Re: BBC spark plug recommendations?

always good to check with head manufacturer...dart told me on my 355 pro 1 to use ngk v-power5671-7 on natural asp.running...i love the vpower ngks!!!
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Old 01-09-2010, 12:02 AM   #3
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Default Re: BBC spark plug recommendations?

Autolite AR3934 would be a good plug.
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Old 01-09-2010, 12:24 AM   #4
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Default Re: BBC spark plug recommendations?

ngk
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Old 01-09-2010, 01:25 AM   #5
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Default Re: BBC spark plug recommendations?

Yeah Dude NGK 5671A-7 or 8's.
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Old 01-09-2010, 01:39 AM   #6
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Default Re: BBC spark plug recommendations?

10's if your on the motor
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Old 01-09-2010, 01:41 AM   #7
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Default Re: BBC spark plug recommendations?

Quote:
Originally Posted by 187z View Post
Autolite AR3934 would be a good plug.
X2. I am not sure about the 345 head, but I used Autolite 3933 on my 540 that had Dart 355 CNC heads. Dart recommended the 3934 if it was going to be used w/pump gas.
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Old 01-09-2010, 02:12 AM   #8
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Default Re: BBC spark plug recommendations?

It will be a pump gas deal. I just went to Dart's website and it looks like they recommend a 3924 or a 3933 for the race plug.
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Old 01-09-2010, 08:52 AM   #9
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Default Re: BBC spark plug recommendations?

For just your everyday driver I would use a autolite 3924 they are not the AR series so everyplace you go will have them and they are cheaper.
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Old 01-09-2010, 08:54 AM   #10
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Default Re: BBC spark plug recommendations?

Quote:
Originally Posted by Harper 68 View Post
10's if your on the motor
This plug is FREEZING??? On Motor??
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Old 01-09-2010, 09:03 AM   #11
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Default Re: BBC spark plug recommendations?

and so is the -7 or -8 you recommend for a 10:1 engine no mind that this same engine has heads that are way too big.
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Old 01-09-2010, 10:39 AM   #12
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Default Re: BBC spark plug recommendations?

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and so is the -7 or -8 you recommend for a 10:1 engine no mind that this same engine has heads that are way too big.
heads too big? Have you ever looked at Island Dragstrips website? They have a picture of a guy standing next to a red 68 chevelle his fucking head is huge.
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Old 01-09-2010, 09:50 PM   #13
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Default Re: BBC spark plug recommendations?

I agree that the heads aren't optimal but its my friends engine. He picked them up new from some guy he knew for practically nothing so he figured he would run them.
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Old 01-09-2010, 11:11 PM   #14
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Default Re: BBC spark plug recommendations?

Quote:
Originally Posted by 32bantam View Post
This plug is FREEZING??? On Motor??
No shit... we use -9 and -10 with blown alky... Don't know how that'd work worth a shit in n/a.
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