Stupid knock
Boost it set at 18.5 psi and I keep getting knock and a hesitation at high rpm's. AFR's are low 11s with 93 fuel. I started with the top map below before upping the boost and had no knock. Now with the higher boost I have the knock. I changed the spark to what you see in the lower map and still have knock. Anyone have any ideas besides lowering boost?
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18.5 psi is what 220kpa? the timing's barely/not changed at that level...
Try a more drastic cull of timing, it's easier to control a fire than put it out ;) |
16* is around what most us stockers run at 12-14psi, just fwiw.
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So I should pull even more spark?
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pull until u stop knocking to see where ur at. Do you have knocksensems?
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19psi on pump gas might just be too much.
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Time for WI =)
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Originally Posted by Savington
(Post 410276)
19psi on pump gas might just be too much.
Originally Posted by Fireindc
(Post 410277)
Time for WI =)
That's what I was afraid of because even with a spark map close to DIY's base map I was getting knock. :jerkit::jerkit::vash: I guess I'll just have to settle for 16 psi. __________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
or run race gas or WI. :bigtu:
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Bad gas maybe? You are on the east coast so it should be a problem.
If you are getting knock on the DIY map then it might be something worse. Are you sure your mechanical timing is correct? The DIY map is so damn conservative, I have no idea how you can develop knock on it. |
try a gallon of toulene when you get to about half a tank. stuff works awesome on my MSM
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Originally Posted by leatherface24
(Post 410317)
try a gallon of toulene when you get to about half a tank. stuff works awesome on my MSM
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