chatter under boost on hot days??
#1
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chatter under boost on hot days??
the subject says it all, only under boost (not when revving and not before 4psi of boost). i get a chattering like the turbine is hitting the housing, pending a check of the turbo for play in the wheel any other suggestions? the turbo is probably baked since i had low oil pressure for a day.
#5
So you have an intake and exhaust with no real fuel mods besides the s-afc? Even with your injectors set to 100% duty I don't think that will be enough fuel. Plus its bad on the injectors.
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did you re-wire your fuel pump? it is the best bang-for-buck fuel mod you can do. i strongly reccomend you do it. it's not hard at all. if you can hook up an amp, you can do it.
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#8
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Not true...my car used to detonate all the time, and my engine is still alive. It turned out to be oxygenated fuel that was the main culprit. Now that I took my FCD off, adjusted my new TPS properly, never run oxygenated gas, and had my timing adjusted, detonation is pretty much a distant memory.
#14
Can someone that had first-hand experience with both fuel-cut AND detonation please define their differences ?
I'm hitting way too much boost right now, so I'm using 99+ Oct fuel to prevent detonation, and taking it easy on the gas pedal, until I can install FD pump and S-AFC. However, when on the highway and in 5th, I encountered what can be described as "hickups", very light, just enough to notice them, 4 or 5 times. Thing is, these did not happen under full boost, but rather when in half-throttle or while deccelerating.
Anyone has a definite answer ?
I'm hitting way too much boost right now, so I'm using 99+ Oct fuel to prevent detonation, and taking it easy on the gas pedal, until I can install FD pump and S-AFC. However, when on the highway and in 5th, I encountered what can be described as "hickups", very light, just enough to notice them, 4 or 5 times. Thing is, these did not happen under full boost, but rather when in half-throttle or while deccelerating.
Anyone has a definite answer ?
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fuel cut is a HUGE buck (twice as bad as the notorious first gear tps sensor going bad buck) after you hit 6.8 or 8.6 psi (depending on years). detonation sounds more like a valve going on a V motor. it clatters alot and u have no power.
#17
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Originally posted by billzrx7
just put in new ones, if my timing was already retarded and it retarsd under boost even more would that cause more detonation?
just put in new ones, if my timing was already retarded and it retarsd under boost even more would that cause more detonation?
-Ted
#18
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Originally posted by The Ace
Can someone that had first-hand experience with both fuel-cut AND detonation please define their differences ?
I'm hitting way too much boost right now, so I'm using 99+ Oct fuel to prevent detonation, and taking it easy on the gas pedal, until I can install FD pump and S-AFC. However, when on the highway and in 5th, I encountered what can be described as "hickups", very light, just enough to notice them, 4 or 5 times. Thing is, these did not happen under full boost, but rather when in half-throttle or while deccelerating.
Anyone has a definite answer ?
Can someone that had first-hand experience with both fuel-cut AND detonation please define their differences ?
I'm hitting way too much boost right now, so I'm using 99+ Oct fuel to prevent detonation, and taking it easy on the gas pedal, until I can install FD pump and S-AFC. However, when on the highway and in 5th, I encountered what can be described as "hickups", very light, just enough to notice them, 4 or 5 times. Thing is, these did not happen under full boost, but rather when in half-throttle or while deccelerating.
Anyone has a definite answer ?
It might be you're running too much fuel - this will cause these "hiccups".
-Ted
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ok gu ys i hear what yer sayin, the problem is i didnt have a timing light to set the timing after the front cover job from the s4->s5 conversion, i have since fixed the problem and am flyin all the way to 18psi of boost =) thanks for the input tho. ill have dyno numbers up soon.
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