Thread: 6* of KR @ 5500 rpm

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  1. #1 6* of KR @ 5500 rpm 
    SE Level Member Garandpa's Avatar
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    '02 GTP Mods are: Canned tune, Headers, Colder plugs, 3.4 Supercharger pulley, 180* thermostat, Stock airbox with K&N filter. I run 93 octane exclusively. I see a degree or so of KR at 3500 rpm, but as I get closer to redline it goes up considerably. At 5500 rpm I get 6* or slightly more. I really don't rev much higher than that because I don't want to destroy my engine, and it's not necessary for any legal driving conditions. Should I be concerned? Will a dyno tune help? Other mods?
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  3. #2 Re: 6* of KR @ 5500 rpm 
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    I had these same mods except I have a gen v supercharger and had a 3.5 pulley and a fenderwell intake and I seen a bit of knock here and there I would recommend getting the fenderwell intake or going up a pulley a tune could help but it will just be removing timing which you want more than boost as it gives more power and drivability so before the tune I would recommend doing the first 2 I mentioned will be cheaper as well
    2004 gtp SD headers, e85, #60 injectors, Walbroh 255lph, junkyard custom fender well intake, lq4 MAF, 3.1 Pulley, 1.95 rockers, l76 springs, shift kit and tranny cooler
    BMR trailing and rear control arms, zzp STB's, tubular control arms, Dorman and Addoco sway bars, intense coilovers, poly bushings and mounts.
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  4. #3 Re: 6* of KR @ 5500 rpm 
    GXP Level Member GTPpower's Avatar
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    A dyno tune will help some. But your pulley is flat-out too small for basically having no mods.
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  5. #4 Re: 6* of KR @ 5500 rpm 
    SE Level Member Garandpa's Avatar
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    Correction: 3.5 pulley.

    Quote Originally Posted by GTPpower View Post
    A dyno tune will help some. But your pulley is flat-out too small for basically having no mods.
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  6. #5 Re: 6* of KR @ 5500 rpm 
    GrandPrix Junkie SgtMarshal's Avatar
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    I would buy an HP Tuner and pull some timing yourself before getting it dyno tuned. you could be running too rich too and that can cause kr.
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  7. #6 Re: 6* of KR @ 5500 rpm 
    GXP Level Member GTPpower's Avatar
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    Quote Originally Posted by Garandpa View Post
    Correction: 3.5 pulley.
    That makes almost no difference versus a 3.4.
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  8. #7 Re: 6* of KR @ 5500 rpm 
    SE Level Member Garandpa's Avatar
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    Quote Originally Posted by GTPpower View Post
    That makes almost no difference versus a 3.4.
    Well, for having "basically no mods" I sure am getting a lot more horsepower than stock. It must be magic!!
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  9. #8 Re: 6* of KR @ 5500 rpm 
    GXP Level Member GTPpower's Avatar
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    How much more horsepower are you making?
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  10. #9 Re: 6* of KR @ 5500 rpm 
    SE Level Member Garandpa's Avatar
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    Quote Originally Posted by GTPpower View Post
    How much more horsepower are you making?
    So far, the highest I have recorded on my scanner is 253 hp @ around 5500 rpm. I'm careful not to rev above that and I'm not always scanning, so I don't know how much above the stock 240 it will go before it crosses the torque curve.
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  11. #10 Re: 6* of KR @ 5500 rpm 
    GrandPrix Junkie SgtMarshal's Avatar
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    you'll make more power on a bigger pulley with no kr
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  12. #11 Re: 6* of KR @ 5500 rpm 
    SE Level Member Garandpa's Avatar
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    Quote Originally Posted by SgtMarshal View Post
    you'll make more power on a bigger pulley with no kr
    That seems counter-intuitive. Why would a larger pulley (less air) make more power?
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  13. #12 Re: 6* of KR @ 5500 rpm 
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    a smaller pulley mean more knock and when your car scans that it has more knock it doesn't run as hard so that your engine doesn't blow you can think of it like a limp mode so if you were to remove the knock sensor from the block and just leave it somewhere it will always scan 0.0 knock and put a 3.4 instead of a 3.6 then yes your car will 100 percent run faster but your engine will blow exponentially quicker than the other pulley due to all the unmonitored knock these are one of the toughest engines ever made so blowing one with small mods is not something to be proud of ive seen guys in the metro area run these things with barely an oil and mud as coolant for months no issue haha. so you are not wrong for the first 3400 rpms you are receiving more air and power but once that knock comes at 3500 the guy with the 3.6 pulley will catch back up and then at 5500 rpms he will pull bus lengths lol im exaggerating but you get the idea
    2004 gtp SD headers, e85, #60 injectors, Walbroh 255lph, junkyard custom fender well intake, lq4 MAF, 3.1 Pulley, 1.95 rockers, l76 springs, shift kit and tranny cooler
    BMR trailing and rear control arms, zzp STB's, tubular control arms, Dorman and Addoco sway bars, intense coilovers, poly bushings and mounts.
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  14. #13 Re: 6* of KR @ 5500 rpm 
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    your engine pulls timing advance to prevent damage to the piston, so even though you might have more airflow, it's losing power from knock retard. a smaller pulley heats up the air more, so there will be more knock if you don't have supporting mods.
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  15. #14 Re: 6* of KR @ 5500 rpm 
    GXP Level Member GTPpower's Avatar
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    Quote Originally Posted by Garandpa View Post
    So far, the highest I have recorded on my scanner is 253 hp @ around 5500 rpm. I'm careful not to rev above that and I'm not always scanning, so I don't know how much above the stock 240 it will go before it crosses the torque curve.
    I wouldn't exactly consider 13hp a lot more.
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  16. #15 Re: 6* of KR @ 5500 rpm 
    GTX Level Member bandook's Avatar
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    I'd just drop it more. I have a 3.25 pulley I can sell ya. You might see 15 of KR, but...least you can say you are on a smaller pulley!
    Top Swapped 01 Imp.
    SD Headers, 2.8" pulley, self ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
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  17. #16 Re: 6* of KR @ 5500 rpm 
    SE Level Member Garandpa's Avatar
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    I'm on a 3.5" pulley because that's what was recommended for my tune. Maybe I should just blindly take the advice of internet trolls?
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  18. #17 Re: 6* of KR @ 5500 rpm 
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    Those scanner hp numbers arent that good on your same setup except a 3.6 I was getting blips of 350hp and often seeing 300 plus
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  19. #18 Re: 6* of KR @ 5500 rpm 
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    Quote Originally Posted by Garandpa View Post
    I'm on a 3.5" pulley because that's what was recommended for my tune. Maybe I should just blindly take the advice of internet trolls?
    obviously you can't trust everything you read. zzp does a good job of selling their products. who are you going to trust more, a salesman or people with actual experience.
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  20. #19 Re: 6* of KR @ 5500 rpm 
    GXP Level Member GTPpower's Avatar
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    I guess it's up to you if you want to replace an engine or not.
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  21. #20 Re: 6* of KR @ 5500 rpm 
    GTX Level Member bandook's Avatar
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    Quote Originally Posted by Garandpa View Post
    I'm on a 3.5" pulley because that's what was recommended for my tune. Maybe I should just blindly take the advice of internet trolls?
    Sorry, not trolling just find it a little humourous. Timing does make a difference, it's not all about pulley sizes. 6 of KR might cost you 30-60hp. One pound of boost will not make up for that. Not to mention the damage u could be doing. Have u looked at your plugs?

    Example. I tuned a 3" with no knock. Just dropped to a 2.8 and tuned for no knock. But I had to pull 2-3 of timing to do so. I'm in to higher boost earlier, but I could be losing a little or at best have little gain at the top. It's all guess work without a dyno. But I sure as hell wouldn't even consider the drop a success if I had 6 of KR.
    Top Swapped 01 Imp.
    SD Headers, 2.8" pulley, self ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
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