Knock with Magnacharger stock tune
#11
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Originally Posted by dewmanshu
So this is a 2000 truck with the 6.0L? Does this mean it's a 2500 or a swapped 6.0L in a 1500? 2000 means FPR. I only ask because it will spell out what kinda of work up to the radix install you have done. Knock may be normal, but not in the high rpms and high load.
Your fuel pressure is perfect.Hmmm. Without a proper scan software it's real hard to see what it could be and what else is happening when you experience the knock. Fuel pressure maybe good but are you lean anyway for some mechanical reason?
Magna will never admit the colder plugs with smaller gap is recommended...think about it, it's all about the CARB. They have sold a product that AMAZINGLY is CARB legal and with that said will not advise any ideas to stray from that structure...that's just my opinion, which isn't worth much. Make sure everything is working right before you chase other "non-magna" recommended ideas. What's your IAT at the knock. TPS? RPM? MAP? Injector duty cycle? Interceptor will only help you so much.
Your fuel pressure is perfect.Hmmm. Without a proper scan software it's real hard to see what it could be and what else is happening when you experience the knock. Fuel pressure maybe good but are you lean anyway for some mechanical reason?
Magna will never admit the colder plugs with smaller gap is recommended...think about it, it's all about the CARB. They have sold a product that AMAZINGLY is CARB legal and with that said will not advise any ideas to stray from that structure...that's just my opinion, which isn't worth much. Make sure everything is working right before you chase other "non-magna" recommended ideas. What's your IAT at the knock. TPS? RPM? MAP? Injector duty cycle? Interceptor will only help you so much.
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I would install NGK TR6 plugs and bring the truck to a dyno that can properly scan it andf check the A/F.You can get a ton of idea's here but you need to really just have it checked out with the right equipment.
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Originally Posted by Slowhawk
I would install NGK TR6 plugs and bring the truck to a dyno that can properly scan it andf check the A/F.You can get a ton of idea's here but you need to really just have it checked out with the right equipment.
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The one thing that annoys me is that now I have to spend more money to get it tuned to compensate for the insufficient magnacharger tune. Don't understand why it's knocking and down on power.
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Something isn't right here. I'm running a radix with an undersized pulley making 10 psi boost, stock radix tune, and am seeing 18° timing with no knock retard at WOT (per hptuners scan). Here is something cheap and relatively easy to do. Take your spark plugs out and look at them. The insulators should be about the color of a roast chicken, with maybe a slight reddish tint. If any are chalky white, then you have a lean condition in that cylinder. If they are all white, then there is something wrong with the fuel system. If it is just one or maybe two white plugs, then I would suspect injectors (dirty, plugged, malfunctioning, loose wire or connector, etc.). Another possibility, although remote, is that the PCM is bad and cannot supply enough current to completely open the injector valves. But please do take a look at the plugs and let us know what you find.
Last edited by GMC_DUDE; 04-09-2006 at 02:20 AM.
#16
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sounds to me like you are tuning around a possible mechanical problem. I have perosnally installed hundreds of these kits and never once seen an issue with knock (even on cali gas). I think you need to take a step back and check some of the obvious things......
Make sure your manifold is tq'd down to 89 inch pounds
Are you using the stock MAF
Headers? This would make it run lean
Air intake? This would makeit run lean
Vacume leak?
I noticed that back in January you had a dyno done and the truck was lean on the stock calibration.....Sounds to me like there is a hidden machanical issue. Have you changed the fuel filter?
What are the other mods that you may have that are not listed?
Make sure your manifold is tq'd down to 89 inch pounds
Are you using the stock MAF
Headers? This would make it run lean
Air intake? This would makeit run lean
Vacume leak?
I noticed that back in January you had a dyno done and the truck was lean on the stock calibration.....Sounds to me like there is a hidden machanical issue. Have you changed the fuel filter?
What are the other mods that you may have that are not listed?
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Originally Posted by BlownChevy
sounds to me like you are tuning around a possible mechanical problem. I have perosnally installed hundreds of these kits and never once seen an issue with knock (even on cali gas). I think you need to take a step back and check some of the obvious things......
Make sure your manifold is tq'd down to 89 inch pounds
Are you using the stock MAF
Headers? This would make it run lean
Air intake? This would makeit run lean
Vacume leak?
I noticed that back in January you had a dyno done and the truck was lean on the stock calibration.....Sounds to me like there is a hidden machanical issue. Have you changed the fuel filter?
What are the other mods that you may have that are not listed?
Make sure your manifold is tq'd down to 89 inch pounds
Are you using the stock MAF
Headers? This would make it run lean
Air intake? This would makeit run lean
Vacume leak?
I noticed that back in January you had a dyno done and the truck was lean on the stock calibration.....Sounds to me like there is a hidden machanical issue. Have you changed the fuel filter?
What are the other mods that you may have that are not listed?
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Originally Posted by BLASTER
The one thing that annoys me is that now I have to spend more money to get it tuned to compensate for the insufficient magnacharger tune. Don't understand why it's knocking and down on power.
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Originally Posted by GMC_DUDE
Something isn't right here. I'm running a radix with an undersized pulley making 10 psi boost, stock radix tune, and am seeing 18° timing with no knock retard at WOT (per hptuners scan). Here is something cheap and relatively easy to do. Take your spark plugs out and look at them. The insulators should be about the color of a roast chicken, with maybe a slight reddish tint. If any are chalky white, then you have a lean condition in that cylinder. If they are all white, then there is something wrong with the fuel system. If it is just one or maybe two white plugs, then I would suspect injectors (dirty, plugged, malfunctioning, loose wire or connector, etc.). Another possibility, although remote, is that the PCM is bad and cannot supply enough current to completely open the injector valves. But please do take a look at the plugs and let us know what you find.
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Originally Posted by Holty
yes, but you have a COMPLETETLY different engine than he does.