Spark Plugs For Darts Confused
Spark Plugs For Darts Confused What are the correct plugs for Dart PRO1's? I called NGK and they suggested BKR7EIX-11 (6988) with my soon to be set up, which is a gasketed plug. E-mailed Dart and they said that would be a good plug. Now I am hearing people using TR55's or TR6's, which are tapered seat plugs. Whats up? Thanks 
On The Tree
Joined: Sep 2005
Posts: 105
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From: Detroit - suburbs
You need to use a 3/4" reach gasketed plug. The tapered seat plugs may seal temporarily (sp?) but it's kinda like running the wrong seat lugnuts on your wheels - not gonna do for the long term.
Whoa, good information. I was just getting ready to buy a set of TR 55's.
Question for Dart, is there a torque specification for the plugs?
How about gap?
Question for Dart, is there a torque specification for the plugs?
How about gap?
Last edited by vettenuts; Apr 4, 2006 at 04:16 PM.
DANG!!!! I installed the wrong plugs. 
I INCORRECTLY assumed that since it was an LS1 head, it would use the same plug so I installed the TR6's in mine! (didn't leak either)
What would be a good TR6 equivilant "nitrous plug"??
I INCORRECTLY assumed that since it was an LS1 head, it would use the same plug so I installed the TR6's in mine! (didn't leak either)
What would be a good TR6 equivilant "nitrous plug"??
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On The Tree
Joined: Sep 2005
Posts: 105
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From: Detroit - suburbs
The NGK FR6 should do for that or for more serious spray situations you can get into the NGK R5671-8's (std tip) or NGK R5672-8 (projected tip). Dart went with the 3/4" reach gasketed plug in those heads 'cuz there are more choices in heat range than taper seat plugs. 
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Verdad Gallardo Is the FR 6 more or less equivalent to the TR 6 in heat range? I prefer a copper plug (I don't mind changing them) but wanted the same heat range as the TR 55. Guess I need to take a visit to the NGK web site, it is actually a pretty nice web site.
Teching In
Joined: Dec 2005
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Open them up. The "extra" 5 on your TR5"5" stands for it coming with a factory .059" gap as opposed to a TR5 with a .039" gap. Now hurry up VN! Get that thing together and 
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I'm one to talk ---- but --- I'm gonna get off the computer and go out to the garage now!
.I'm one to talk ---- but --- I'm gonna get off the computer and go out to the garage now!
heh, I didnt even pay any attention and have been using TR-6s in mine, just ASSumed they used the same plugs as stock LS1 heads since they are LS1 heads 
TR-6s are good enough for 144mph in the 1/4 though lol.
TR-6s are good enough for 144mph in the 1/4 though lol.
On The Tree
Joined: Sep 2005
Posts: 105
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From: Detroit - suburbs
A tech sheet can be e-mailed to any of you that may not have received one with your heads. The tech sheet has spark plugs rec's, etc. For some reason it doesn't appear on our site either (?) but we'll get that fixed asap.
FWIW, it appears FR-6 doesnt exist except a FR6EI which is a 12.00 each super duper plug lol. FR5 is still a good number.
So it looks like 3922-3923 autolites for cheap, easy to find TR6 replacements for the gasket seat heads.
Or the NGK R5671A-8's or R5671A-7's (A is for 5/8 hex) but I dont think those are resistor plugs. May cause some interference in the PCM using the non resistor plugs..
If you insist on V-power NGK then BCPR6EY-11 (.044 gap) or BCPR7EY-11 should do it for colder then stock plugs.
maybe
So it looks like 3922-3923 autolites for cheap, easy to find TR6 replacements for the gasket seat heads.
Or the NGK R5671A-8's or R5671A-7's (A is for 5/8 hex) but I dont think those are resistor plugs. May cause some interference in the PCM using the non resistor plugs..
If you insist on V-power NGK then BCPR6EY-11 (.044 gap) or BCPR7EY-11 should do it for colder then stock plugs.
maybe
Originally Posted by Malihoochie
A tech sheet can be e-mailed to any of you that may not have received one with your heads. The tech sheet has spark plugs rec's, etc. For some reason it doesn't appear on our site either (?) but we'll get that fixed asap.
). I sent you a PM with my e-mail address.
Originally Posted by kp
FWIW, it appears FR-6 doesnt exist except a FR6EI which is a 12.00 each super duper plug lol. FR5 is still a good number.
So it looks like 3922-3923 autolites for cheap, easy to find TR6 replacements for the gasket seat heads.
Or the NGK R5671A-8's or R5671A-7's (A is for 5/8 hex) but I dont think those are resistor plugs. May cause some interference in the PCM using the non resistor plugs..
If you insist on V-power NGK then BCPR6EY-11 (.044 gap) or BCPR7EY-11 should do it for colder then stock plugs.
maybe
So it looks like 3922-3923 autolites for cheap, easy to find TR6 replacements for the gasket seat heads.
Or the NGK R5671A-8's or R5671A-7's (A is for 5/8 hex) but I dont think those are resistor plugs. May cause some interference in the PCM using the non resistor plugs..
If you insist on V-power NGK then BCPR6EY-11 (.044 gap) or BCPR7EY-11 should do it for colder then stock plugs.
maybe
Originally Posted by Malihoochie
A tech sheet can be e-mailed to any of you that may not have received one with your heads. The tech sheet has spark plugs rec's, etc. For some reason it doesn't appear on our site either (?) but we'll get that fixed asap.
Originally Posted by JoeMack
What is the difference between those and the BKR7E-11 and BKR6E-11 that NGK recomended to me?
The plugs they reccomended in your first post were irridium or whatever.
I'll just use the autolite 3922/23 for now
