Thread: Spark plug Reviews

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  1. #1 Spark plug Reviews 
    GT Level Member bayareagtp's Avatar
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    Ok let hear what everyone has and what everyone prefers for their spark plugs and also let us know what kind of car they are in race or daily driver and so on .
    1998 GTP , 3" down pipe w/cat , u-bend delete , full 3" exhaust w/ magnaflows , no resonator , powerslot front rotors , Overkill PCM , Overkill FWI , 180* t-stat , 1* colder plugs , alt. re-wire , alt. stage 1 booster . 215 whp and 238 torque .
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  2. #2 Re: Spark plug Reviews 
    I AM PEWPIN! rynoman03's Avatar
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    Autolite 104 Light Racing and Daily Driver.
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  3. #3 Re: Spark plug Reviews 
    SE Level Member scooz14's Avatar
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    al 103's

    i beat the **** out of it
    12.591@108.00 1.95 60'
    329.9hp 400.1tq
    http://www.mccgp.com/member_details.php?mid=95
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  4. #4 Re: Spark plug Reviews 
    SS-DD Level Member IndeedSS's Avatar
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    I've used. TR6IX, TR55IX, AL103, AL104, AR103's. Daily driver.

    While not much difference between them, my car seems to like the TR6IX a little better as far as smooth idle, mpg. I noticed no difference between any of them as far as KR.
    Last edited by IndeedSS; 01-10-2008 at 07:58 PM.
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  5. #5 Re: Spark plug Reviews 
    GT Level Member bayareagtp's Avatar
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    i know they are talking about this in another post too but what about brisk ? also what about iridium and some of the quad point plugs ? goods/bads ? i was told autolites 1 degree colder than stock , gaped 55 that is what someone told me to use . daily driver now but soon light racing with more mods .
    1998 GTP , 3" down pipe w/cat , u-bend delete , full 3" exhaust w/ magnaflows , no resonator , powerslot front rotors , Overkill PCM , Overkill FWI , 180* t-stat , 1* colder plugs , alt. re-wire , alt. stage 1 booster . 215 whp and 238 torque .
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  6. #6 Re: Spark plug Reviews 
    SS-DD Level Member IndeedSS's Avatar
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    Quote Originally Posted by bayareagtp View Post
    i know they are talking about this in another post too but what about brisk ? also what about iridium and some of the quad point plugs ? goods/bads ? i was told autolites 1 degree colder than stock , gaped 55 that is what someone told me to use . daily driver now but soon light racing with more mods .

    .055 is correct. The TR55IX and TR6IX that I mentioned are iridiums. On newer wbodys iridium is factory installed.

    The one this I noticed when doing research on the Brisk is that the quad recommended for a stock GTP also has a foot note about potential blow out. Eventhough they recommend their iridium plugs for higher boosted application, it's not clear what configuration you get, Single, double or triple prong. I am interested in the soon coming review.

    autolite 606 is stock, 605 is one step colder 104 is 2 steps colder and 103 is 3 steps colder than stock.
    Last edited by IndeedSS; 01-11-2008 at 08:29 PM. Reason: wrong info listed
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  7. #7 Re: Spark plug Reviews 
    GrandPrix Junkie
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    iridium is fine, platinum seems to be an issue. I run autolites never had a problem. I have seen many cars run the multi point plugs and foul them constantly (any quad 4 I ever saw them in they were fouled)
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  8. #8 Re: Spark plug Reviews 
    GTP Level Member J_Ferguson's Avatar
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    Norm would be a Autolite 104's

    But am trying out the BRISK GOR15LGS
    same heat range as the 104's and a very impressive plug.
    I have used 104's, 103's TR6, TR5's

    1998 GTP, U-Bend Delete,Hi-Flow Cat,No Res,SLP Headers,BRISK Plugs ,180 T-Stat, 3.4 pully
    2007 GM Show and shine August 10http://www.youtube.com/v/aRh91q1jRio&rel=1
    OQCGP Clubhttp://www.youtube.com/v/j_YHmgU9ehs&rel=1
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  9. #9 Re: Spark plug Reviews 
    GT Level Member Going Too Phast's Avatar
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    Quote Originally Posted by IndeedSS View Post
    605 is stock, 104 is one step colder and 103 is 2 steps colder than stock.
    Actually, I believe AL 606's are equivalent to the stock heat range. But 605's are recommended because it can help reduce the factory GTP KR since they are one step colder. So 104's are two steps, 103's three steps, etc.
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  10. #10 Re: Spark plug Reviews 
    I live here. UR LOSN's Avatar
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    AL 103's GTP drag,

    have iridiums in GT now...smooth idle.

    I have had bosch platnium 4's in my old 95 SE....it hated them...burned out.
    2001 GTP- PT76 turbo, Intense Drag cars old engine, Stage 4 Intense turbo cam,FMIC,150 wet,Double roller timing chain,Diamond forged coated pistons 8:0:1,Diamond piston rings,Cryoed L32 connecting rods,Cryoed crank,Clevite77 main bearings,Clevite77 cam bearings,Clevite77 L32 rod bearings,ARP Everything, Intense/meizere true billet Flexplate,Intense Wilson UIM/LIM,Intense oil pressure kit,Cometic,OE-R lifters,Cryoed L67 block,ATI turbo dampner,80# inject,Weldon 2035 fp,Aero Fuel Rails,AL cradle
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  11. #11 Re: Spark plug Reviews 
    SS-DD Level Member IndeedSS's Avatar
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    Quote Originally Posted by Going Too Phast View Post
    Actually, I believe AL 606's are equivalent to the stock heat range. But 605's are recommended because it can help reduce the factory GTP KR since they are one step colder. So 104's are two steps, 103's three steps, etc.
    you are right. DOH!
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  12. #12 Re: Spark plug Reviews 
    SS-DD Level Member IndeedSS's Avatar
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    I emailed BRISK about what plug to use on a mildly modded 3.8l s/c V6 with about 11PSI, and got this response today:

    Hi Lee,
    the spark plug you need is Brisk Silver Racing G14YS. That is a spark plug specially designed for forced induction applications, nitrous or methanol injection.... and we have many vehicles with over 3500Hp running the Brisk Silver Racing plugs and setting world records. The LGS is excellent choice for N/A and stock boost forced induction applications. Your vehicle have powerfull ignition system and will handle the GOR14LGS plug at your boost level, but due to the higher boost and altered A/F ratio the lifespan of the plug will be relatively short.
    Hope this info will help.

    Best regards,
    Chris


    EDIT: I noticed the plugs Brisk recommended are NOT resistor plugs. I've emailed back for verification. But on a car ran by computer electronics, this is probably not a good idea.
    Last edited by IndeedSS; 01-11-2008 at 11:34 AM.
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  13. #13 Re: Spark plug Reviews 
    GT Level Member SD GTP's Avatar
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    I'm using AL Platinum 104s gapped at .55 Cars likes 'em and I've never had a problem with them. I ran AL 605s in my old 97 GT.

    Kind of on the same subject, if anyone here is using Taylor Wires, I would not recommend them. I found them to be the source for misfires and bad connections when I had them on my GT. also, the connectors liked to break when I changed plugs. I've heard the MSDs are a solid choice if anyone is looking for a solid set up.
    MACGP President
    3.25"/P&P Gen III/ZZP Stg II TB/Thasher CAI/ZZP VS Cam/TOG Xtremes/AL 104s/180*/Full 3" Exhaust/SD Package/GMPP Sways & Arms/DuBob'd
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  14. #14 Re: Spark plug Reviews 
    SE Level Member AlphaBetaBase's Avatar
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    I always questioned the 4's from a logical standpoint.

    An arc goes to the path of least resistance so it will always go to one of the four points. Yea, if the good point becomes foul it has 3 others to choose from. Problem one doesn't become foul on its own. Therefore, I never bought them.

    Mine are 103s. Daily driver. Had Bosch iridiums before when I was N/A. No issues with either.
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  15. #15 Re: Spark plug Reviews 
    SE Level Member AlphaBetaBase's Avatar
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    Quote Originally Posted by SD GTP View Post
    Kind of on the same subject, if anyone here is using Taylor Wires, I would not recommend them. I found them to be the source for misfires and bad connections when I had them on my GT. also, the connectors liked to break when I changed plugs. I've heard the MSDs are a solid choice if anyone is looking for a solid set up.
    I had 8mm MSDs on mine. I noticed a slightly better throttle response but that's it. I've heard they don't last long but I didn't experience any problems.

    Everyone told me to only use stock when it comes to the GPs ignition i.e., wires, coils. No aftermarket compares to it.
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  16. #16 Re: Spark plug Reviews 
    SE Level Member Blue03GTP's Avatar
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    Can somebody school me on going to a colder plug from stock? Thanks.
    Blue 2003 Limited Edition.
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  17. #17 Re: Spark plug Reviews 
    GTX Level Member webracin's Avatar
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    This is some info I tried to compile a while ago.....


    97-03 Grand Prix
    Manufacturer/Type < < < Colder Stock Hotter > > >


    AC Delco

    Copper 41-919 41-932 41-921
    Platinum
    Double Platinum
    Iridium 41-985 41-101


    Autolite

    Copper 104 605 606
    Platinum AP606
    Double Platinum APP606
    Iridium


    Bosch

    Copper 7580
    Platinum 6241
    Double Platinum 4304
    Iridium


    Denso

    Copper
    Platinum
    Double Platinum PT16ETR-L13
    Iridium IT16


    NGK

    Copper TR55
    Platinum TR55GP
    Double Platinum PTR4B-15
    Iridium TR7IX TR6IX TR55IX

    Platinum is not recommended for engines with power adders.


    Nice info on why to run colder plugs and what it means... Spark Plug Info

    webracin

    2001 Grand Prix GTP
    ZZP HUB 3.2 3.4, ZZP 8 Rib conversion, JC 3" DP Gen 2 cat & U-bend Delete, Accel Super Stock 8mm wires, DHP 1.5, 180* Thermo, Throttle Spacer, SS Intercooler, ZZP Fuel Rails, SLP CAI w/K&N Cone, Dynomax cat back, ZZP Tranny.

    2000 Grand Prix GTP Daytona K&N, Flowmasters
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  18. #18 Re: Spark plug Reviews 
    SS-DD Level Member IndeedSS's Avatar
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    Chis on the NGK, the stock replacement iridium is the TR55IX.

    Although you are not supposed to gap iridium plugs here is a how-to for those like me who can't leave good enough alone. Installation Guide: DENSO Iridium
    Last edited by IndeedSS; 01-11-2008 at 08:55 PM. Reason: added a link for iridium gapping
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  19. #19 Re: Spark plug Reviews 
    GT Level Member shaferz's Avatar
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    I run 103's right now, but over the summer last year I ran TR8's since I was spraying so much. My car seemed to like them quite a bit. Definate decrease in KR, and I changed the plugs whenever I did an oil change to keep them fresh.

    99 GTP = 12.936 @ 112.12 2.16 60'
    06 TBSS = STOCK
    07 GXP = STOCK - ordering SSC's
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  20. #20 Re: Spark plug Reviews 
    GTX Level Member webracin's Avatar
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    must have fat fingered that one.....

    Also added a link to some good info on what and why on colder plugs.

    webracin

    2001 Grand Prix GTP
    ZZP HUB 3.2 3.4, ZZP 8 Rib conversion, JC 3" DP Gen 2 cat & U-bend Delete, Accel Super Stock 8mm wires, DHP 1.5, 180* Thermo, Throttle Spacer, SS Intercooler, ZZP Fuel Rails, SLP CAI w/K&N Cone, Dynomax cat back, ZZP Tranny.

    2000 Grand Prix GTP Daytona K&N, Flowmasters
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