Thread: Knock Retard on Stock 99 GTP

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  1. #1 Knock Retard on Stock 99 GTP 
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    I hooked up my scan gauge on my 99 GTP today to check and see if I was getting any knock retard. I have a completely stock gtp with no upgrades and have been debating about getting the Speed Daddy headers in the future. I now am getting about 2 -3 knock retard under WOT through 2nd gear and it jumps up to about 5 in 3rd grear. Is this normal knock retard for stock?
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    GrandPrix Junkie Bluemagic's Avatar
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    All cars knock from factory. That's normal. Good? I would say no. Something to stress about? Nope. Install the headers and you'll see that 2-3 drop down to maybe 0. You have any modifications done to the engine?


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  3. #3 Re: Knock Retard on Stock 99 GTP 
    The Boss Iceman6669's Avatar
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    headers and 93 should = 0*kr on stock pulley.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
    Too Hot to Handle, Too Cold to Hold
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  4. #4 Re: Knock Retard on Stock 99 GTP 
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    Quote Originally Posted by Bluemagic View Post
    All cars knock from factory. That's normal. Good? I would say no. Something to stress about? Nope. Install the headers and you'll see that 2-3 drop down to maybe 0. You have any modifications done to the engine?


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    Thanks for the replies. I have not done any modifications to the engine yet. I am currently running the Walmart 93 octane gas in it. I'm not convinced to purchase the Speed Daddy headers yet because I don't know how reliable they are. It would be great if I did have 0 kr.
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  5. #5 Re: Knock Retard on Stock 99 GTP 
    Moderator dsmuts's Avatar
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    Get better gas the walmart stuff sucks. I get less KR on shell gas here in town then any other gas i've ever got since scanning.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  6. #6 Re: Knock Retard on Stock 99 GTP 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Quote Originally Posted by Iceman6669 View Post
    headers and 93 should = 0*kr on stock pulley.
    Maybe.

    I still knocked.

    SMGPFC Member #1
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