wildcat Posted October 27, 2007 Report Share Posted October 27, 2007 I have always noticed that the rear end of my white car has fine soot particles on it after I go for a drive. I like to drive aggressively, so I'm thinking maybe it dumps fuel or something when I gas it hard. There is soot that accumulates in the tailpipes too. It only takes one drive around town to notice the buildup. Is this normal and nothing to worry about, or should I get the dealer to check it before I do any engine mods? (I haven't done any engine mods yet. I'll be doing CAI/Pulley/Tune on Friday.) Thanks! Link to comment Share on other sites More sharing options...
HSURB Posted October 27, 2007 Report Share Posted October 27, 2007 You may be seeing some soot from the exhaust. But I would be that 80% of what you are seeing on the back of the car is brake dust. It's amazing how quickly it accumulates on this car. HSURB Link to comment Share on other sites More sharing options...
wildcat Posted October 27, 2007 Author Report Share Posted October 27, 2007 I know I get some brake dust, but this is not on the rear quarter panels at all. It's all over the rear bumper, the license plate, and the trunk. Wouldn't brake dust get on the rear quarters and the wheels? I do see some brake dust, but it seems more on the front wheels. Maybe I should do a test and go start it up and rev the engine for a good couple minutes. (no driving, and thus no breaking or brake dust). I'll take a couple close up pics and let you see. I just detailed the car yesterday so it's spotless right now. I cleaned out the tailpipes yesterday too. Link to comment Share on other sites More sharing options...
Grabber Posted October 27, 2007 Report Share Posted October 27, 2007 You may be seeing some soot from the exhaust. But I would be that 80% of what you are seeing on the back of the car is brake dust. It's amazing how quickly it accumulates on this car. HSURB BRUSH is correct on this. Mine does it too, and I clean it off like this: 1. Blow most of it off with an air compressor. 2. California duster on the rest of it. 3. Finish up with quick detailer spray (ice) and wipe with a fibre towel. I put my car away clean all the time, and this works great for me. I do the same thing on the rest of the car. Of course I use a different old crappy towel / rag on the rims and tailpipe interior. Link to comment Share on other sites More sharing options...
Alloy Dave Posted October 27, 2007 Report Share Posted October 27, 2007 BRUSH is correct on this. Mine does it too, and I clean it off like this: 1. Blow most of it off with an air compressor. 2. California duster on the rest of it. 3. Finish up with quick detailer spray (ice) and wipe with a fibre towel. I put my car away clean all the time, and this works great for me. I do the same thing on the rest of the car. Of course I use a different old crappy towel / rag on the rims and tailpipe interior. Change to Porterfield pads. :happy feet: Link to comment Share on other sites More sharing options...
wildcat Posted October 27, 2007 Author Report Share Posted October 27, 2007 What you're talking about is different that what I'm talking about. If I were to try to "dust" off the soot particles that get all over the rear end of my car, they would SMEAR!! It's not dust, it's SOOT!! Pics to follow. Link to comment Share on other sites More sharing options...
ati Posted October 27, 2007 Report Share Posted October 27, 2007 Change to Porterfield pads. :happy feet: Dave, How are those new pads working out for you? Alan Link to comment Share on other sites More sharing options...
Grabber Posted October 27, 2007 Report Share Posted October 27, 2007 I know what you're talking about. I get the soot too. It has to be wiped off. I get 20% soot and 80% dust but I clean it after every ride, so it does not ever build up. Link to comment Share on other sites More sharing options...
ingram4868 Posted October 27, 2007 Report Share Posted October 27, 2007 Any air fuel mixture is going to get changed during your tune anyway. I would have them install a permanent wideband sensor for you so that you can monitor the A/F all the time or just plug it in periodically to make sure it is stays consistant over time. Link to comment Share on other sites More sharing options...
Redline Posted October 27, 2007 Report Share Posted October 27, 2007 Mine gets the soot as well, and I already changed my pads to the Steeda/Hawk HPS and got rid of the brake dust problem. Link to comment Share on other sites More sharing options...
wildcat Posted October 27, 2007 Author Report Share Posted October 27, 2007 Well, I took it out for about a 1 mile hard run with as little breaking as possible, and ..... there wasn't much gunk on the rear, much to my surprise. Maybe it is mostly brake dust. I think you guys might be right! Why does it look dark black and clumpy instead of a fine dust? I thought brake dust would be a fine dust, not little gooey clumps? And why is there none on the quarter panels, only on the rear end? Link to comment Share on other sites More sharing options...
Grabber Posted October 27, 2007 Report Share Posted October 27, 2007 Why does it look dark black and clumpy instead of a fine dust? I thought brake dust would be a fine dust, not little gooey clumps? And why is there none on the quarter panels, only on the rear end? When the exhaust throws a little of that carbon crap out, and it also has a little moisture in it from condensation and the air flow from under your car stirs it up as you drive, it has a tendency to allow a little bit of it collect on your back bumper and trunk. Sometimes a little brake dust mixes with this and it sticks to the trunk and bumper also making it a little more noticeable. We all have it. Link to comment Share on other sites More sharing options...
HSURB Posted October 27, 2007 Report Share Posted October 27, 2007 When the exhaust throws a little of that carbon crap out, and it also has a little moisture in it from condensation and the air flow from under your car stirs it up as you drive, it has a tendency to allow a little bit of it collect on your back bumper and trunk. Sometimes a little brake dust mixes with this and it sticks to the trunk and bumper also making it a little more noticeable. We all have it. Used to date a gal that had it also. HSURB Link to comment Share on other sites More sharing options...
wildcat Posted October 27, 2007 Author Report Share Posted October 27, 2007 Good, at least I don't need to worry. I just need to keep cleaning it after every drive. Oh well, as long as it's normal! Link to comment Share on other sites More sharing options...
mrfarmdog Posted October 27, 2007 Report Share Posted October 27, 2007 I get the soot as well. I posted about it on anther site. It really shows up on my FRPP exhaust tips. Car seems to be running fine though. Perhaps I am not running it hard enough. NOT! Link to comment Share on other sites More sharing options...
SkyPilot Posted October 28, 2007 Report Share Posted October 28, 2007 I have gotten it since day one on my 07 GT500 vert. 1600 miles and shows no sign of letting up. Did changing brake bads help a lot or just a little? THX Link to comment Share on other sites More sharing options...
6-Speed Posted October 28, 2007 Report Share Posted October 28, 2007 I get the soot as well - most noticable on the white stripes on the rear of the car. It happened since day one. I thought it was brake dust after reading all the issues on this site. Does changing to the Porterfield pads get rid of the soot? Link to comment Share on other sites More sharing options...
lambbo Posted October 28, 2007 Report Share Posted October 28, 2007 Wow, I'm surprised none of you know that the exhaust produces moisture. It gets blown out when you accelerate. All cars with a good exhaust system do it, just some more than others depending on how the system is set up. The 460 in my Mud truck looked like a shower coming out of the pipes and my wife had a Escort GT when we started dating that had to have a new muffler every 6 months because it would rust out. Link to comment Share on other sites More sharing options...
Big_Slick737 Posted October 28, 2007 Report Share Posted October 28, 2007 BRUSH is correct on this. Mine does it too, and I clean it off like this: 1. Blow most of it off with an air compressor. 2. California duster on the rest of it. 3. Finish up with quick detailer spray (ice) and wipe with a fibre towel. I put my car away clean all the time, and this works great for me. I do the same thing on the rest of the car. Of course I use a different old crappy towel / rag on the rims and tailpipe interior. Grabber, Do you have two of these Cal dusters? One for use on the car the other on your wheels ? Or do you use the same one on both the car and the wheels to remove the brake dust ? Or is it just a Rag on the Wheels and rims ? Link to comment Share on other sites More sharing options...
Grabber Posted October 29, 2007 Report Share Posted October 29, 2007 Grabber, Do you have two of these Cal dusters? One for use on the car the other on your wheels ? Or do you use the same one on both the car and the wheels to remove the brake dust ? Or is it just a Rag on the Wheels and rims ? I just use old rags on my wheels. Link to comment Share on other sites More sharing options...
Grabber Posted October 29, 2007 Report Share Posted October 29, 2007 Wow, I'm surprised none of you know that the exhaust produces moisture. It gets blown out when you accelerate. All cars with a good exhaust system do it, just some more than others depending on how the system is set up. The 460 in my Mud truck looked like a shower coming out of the pipes and my wife had a Escort GT when we started dating that had to have a new muffler every 6 months because it would rust out. My post #12 mentions moisture. I have factory drain holes in Corsa's and I get a few drips out of there. Link to comment Share on other sites More sharing options...
phr3121 Posted October 29, 2007 Report Share Posted October 29, 2007 I have always noticed that the rear end of my white car has fine soot particles on it after I go for a drive. I like to drive aggressively, so I'm thinking maybe it dumps fuel or something when I gas it hard. There is soot that accumulates in the tailpipes too. It only takes one drive around town to notice the buildup. Is this normal and nothing to worry about, or should I get the dealer to check it before I do any engine mods? (I haven't done any engine mods yet. I'll be doing CAI/Pulley/Tune on Friday.) Thanks! Interesting! Negative on mine. I have almost 2,000 miles and never had a "soot" buildup on the rear bumper or tailpipe. My car was built in April of "07. No modifications (stock engine & filter). It has to be your air-fuel mixture. I noticed you have not yet done the CAI/tune modification, are you running a K&N filter? I'm amazed so many people are also having this soot problem.... I do however have the brake dust problem others have mentioned, it shows up in the sides and rear bumper. These are dry particles that can be blown away with an air hose, nothing that sticks. When I run my fingers through the tailpipe I only get minor black carbon build up to show for, it’s dry not soot. Also, do you park your car outside or inside? * Wayne, I just noticed that we both live in Tulsa! Let me know if you want to get together since I have only seen two other GT500s in town since purchasing my car. You can PM me or email me under the address on my profile. Good luck.... Link to comment Share on other sites More sharing options...
6-Speed Posted October 29, 2007 Report Share Posted October 29, 2007 I looked at my rear bumper again today after driving about 30 miles and noticed the particles that collected are mostly fine and dry. There were a few specs that were about an 1/8" long. I believe it's just brake dust. It collects on the rear bumper and along the side of the car and on the rims. I just need to replace the brake pads and see what happens. Link to comment Share on other sites More sharing options...
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