Detonation
06-02-2007, 08:31 PM
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Detonation
Thought i'd put it here since its not getting alot of replies from the fi forum
So i was out at the track last night and my car was running good first couple of pulls. I blew charge pipes a few times (my clamps suck, im getting new ones) But anyways, After about 3 passes my car started to detonate after like 5-6k during 3rd and 4 gear pulls. So i stopped (obviously that isnt good). I drove it home, its fine under boost. Today i get up and try to figure out whats going on and i get out my timing gun and for some reason my timing was way off like at 0btc so i adjust back to 16 which is like way back on the dizzy for some reason. And take the car out to see whats going on. I go to do a 3rd gear pull and i notice my boost gauge isnt reading, and i hear a big pop. I look back and see my charge pipe in the middle of the road. So i have that now its all dented. But after inspecting my car i notice the vaccum line off the bov to the boost gauge is completely in half, and a decent hole in the vacuum line to the fpr. This may have happened last night, could the vacuum leaks be a cause for detonation (maybe the one to the fpr?) Im confused, my car was just tuned a few weeks ago and running fine.
So i was out at the track last night and my car was running good first couple of pulls. I blew charge pipes a few times (my clamps suck, im getting new ones) But anyways, After about 3 passes my car started to detonate after like 5-6k during 3rd and 4 gear pulls. So i stopped (obviously that isnt good). I drove it home, its fine under boost. Today i get up and try to figure out whats going on and i get out my timing gun and for some reason my timing was way off like at 0btc so i adjust back to 16 which is like way back on the dizzy for some reason. And take the car out to see whats going on. I go to do a 3rd gear pull and i notice my boost gauge isnt reading, and i hear a big pop. I look back and see my charge pipe in the middle of the road. So i have that now its all dented. But after inspecting my car i notice the vaccum line off the bov to the boost gauge is completely in half, and a decent hole in the vacuum line to the fpr. This may have happened last night, could the vacuum leaks be a cause for detonation (maybe the one to the fpr?) Im confused, my car was just tuned a few weeks ago and running fine.
06-02-2007, 08:33 PM
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Re: Detonation (Boostedb20EH2)
And here is a video, its best distinguished in 4th
http://smg.photobucket.com/alb...e.flv
http://smg.photobucket.com/alb...e.flv
06-03-2007, 08:39 PM
#3
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Re: Detonation (Boostedb20EH2)
That didnt sound like detonation, it sounded like a miss to me. 0btdc is way retarded, im suprised your car doesn't after-burn huge supra-like flames. Are you sure your timing your engine on the right marks? There is a set of white ones and a red one, the red one is the one you wanna use, your dizzy should be near the center of its travel for factory timing.
I dont know how much timing your tune requires, or what fuel. You may have sent a backfire up the intake, that could explain the hose clamps, and but moreover the lines splitting in half. But that doesnt make any sense because your timing is retarded, not heavily advanced. I would replace the lines before anything else, so everything is the way it should be.
I dont know how much timing your tune requires, or what fuel. You may have sent a backfire up the intake, that could explain the hose clamps, and but moreover the lines splitting in half. But that doesnt make any sense because your timing is retarded, not heavily advanced. I would replace the lines before anything else, so everything is the way it should be.
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