Subject	I think it has to do with age, condition of the seals.
Posted by	Spee on February 08, 2006 at 4:40 PM
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In Reply To	Im going to take a conversation over here from technical posted by SnowManZ on February 08, 2006 at 04:20 PM
Message	It's not that they need back pressure as a rule, but I think that when they have been used for so long in the backpressure environment of the precats, they "get used" to it. Now, they are introduced to a lot less backpressure and start to fail. Again, this theory is based on the age and condition of the seals. It's not a general rule. I have had zero trouble with mine since installing down and test pipes. Later, Spencer AIM: sbsTT14 PETZ member #4 '91 300ZX TT Stage V+ '96 Jeep Cherokee Sport "also tired of ppl driving in a straight line for 1/4 mile and thinkin they're hot shit" - hey GotBo0st 22:17:26 09/26/04 "Moral of my night, fucking young people who inheret money, and dont know shit, but think they do are dumb fucks." - suprakillinz 02:37:37 07/02/05 "You are stupidier than dirt." - AzHeat 21:23:10 08/05/04 "Welcome, and I'd listen to Spee" - BigTDogg (MA) 18:21:41 02/17/04 "SCORE: Spee=1 The rest of us=0 (n/m)" - jaymztt(seWA) 19:17:12 07/23/04
Follow Ups	Im going to take a conversation over here from technical - SnowManZ 16:20:39 02/08/06 I've seen this happen when switching cars from cats to TP's. - Dave N 16:25:16 02/08/06 I put in dp's and tp's, and they started smoking sometimes, - Waco300zx 16:28:06 02/08/06 mobil 1, I already had test pipes on there before I had - SnowManZ 16:28:52 02/08/06 No, they're still running. I've switched one car to a - Dave N 16:33:38 02/08/06 I'm headed home for the night - if you want to discuss this - Dave N 16:35:33 02/08/06 Down pipes on original turbos (150,000) did cause any... - JoneZ 16:32:22 02/08/06 Were your pre cats gutted? - CrazyGreek 16:36:16 02/08/06 No my pre cats weren't gutted. anything is possible. - SnowManZ 16:40:47 02/08/06 Don't confuse the two. - SactoTodd 16:37:34 02/08/06 Exactly what I was thinking. Not just cats but the AIV - CaliguyPurdue 16:43:51 02/08/06 Seen it a few times before. One of the most rememberable - Ash's Z 16:38:47 02/08/06 That makes sense as an explaination of the variation, but... - JoneZ 16:47:55 02/08/06 The lower the pressure in the exhaust, the greater the - CaliguyPurdue 16:54:32 02/08/06 I am uploading my turbo rebuild images to help answer - Ash's Z 17:01:17 02/08/06 Great explanation! That makes sense to me now - JoneZ 17:12:39 02/08/06 So basically, if you have stock/sp500 turbos, there a chance - Waco300zx 17:47:32 02/08/06 piggyback question... - LJZTT 17:55:25 02/08/06 thats the excact question I wanted to know (n/m) - SnowManZ 18:02:56 02/08/06 That all depends on how worn out the turbos are. - Ash's Z 18:10:58 02/08/06 Well, it isn't isolated to just stockers or sport500s. - Ash's Z 18:01:33 02/08/06 interesting that this is never talked about much... - Waco300zx 00:41:21 02/09/06 expand your search terms in the tech forum. - Spee 01:50:27 02/09/06 I think it has to do with age, condition of the seals. - Spee 16:40:47 02/08/06 Some of them do need backpressure to work properly. - Ash's Z 16:47:42 02/08/06 Should I get some, cats to put ont the testpipes? - SnowManZ 16:57:09 02/08/06 You aren't the first to experience this. It is my opinion - Ash's Z 17:06:20 02/08/06 from what youve seen... - nissanZtt222 17:12:18 02/08/06 There is no specific timeframe. It is all dependent on the - Ash's Z 17:16:46 02/08/06 thanks ash, guess ill just have to hope (n/m) - nissanZtt222 17:18:59 02/08/06 Re:I have close to 5K on my new Sport 500's>>> - racer2fst 17:30:23 02/08/06 Good to hear, Rob. It sounds like you may be past the - Ash's Z 17:33:58 02/08/06 unfortunetly the midpipes are long gone. - SnowManZ 17:16:13 02/08/06 Well, hold in there for my variable backpressure exhaust - Ash's Z 17:19:13 02/08/06 price of your exhaust plus turbos vs turbo's and cats - SnowManZ 17:33:47 02/08/06 well that was probably from the cats, not the seals... - Spee 17:50:10 02/08/06 Oh, I definately agree with you on all of your points. - Ash's Z 17:57:13 02/08/06 clarification... - Spee 18:35:04 02/08/06 Ah - the cats are going to break down SOME of the oil - Ash's Z 18:41:25 02/08/06 that was my stance on why mine started smoking... (n/m) - Waco300zx 00:37:57 02/09/06 I agree and disagree due to my situation. - inf 17:32:47 02/08/06 not sure where to but in here, but although Ash is talking - LJZTT 17:36:28 02/08/06 i am referrin to stockers. we discussed how the 500's - SnowManZ 17:43:51 02/08/06 hmm, well looks like I will be holding onto my current - LJZTT 17:52:35 02/08/06 Exactly. I was using the Sport500s as an example. - Ash's Z 17:52:57 02/08/06 crystal clear now, thanks (n/m) - LJZTT 17:56:40 02/08/06 Alright Ash one more question. Are turbos cooked now, - SnowManZ 18:06:51 02/08/06 Easy answer, YES (on both counts). - Ash's Z 18:10:08 02/08/06 not what I wanted to hear. Why isnt this problem more - SnowManZ 18:18:09 02/08/06 Well, there are downsides to upgrading a vehicle - - Ash's Z 18:39:24 02/08/06 yep, I searched, used the usual keywords, but the - SnowManZ 18:46:53 02/08/06 And you wont see it on other turbo car forums either - SeedyROM 18:59:16 02/08/06 I'd like to think we are more knowledgeable on this forum - Ash's Z 19:11:48 02/08/06 so its true? we are far superior to other car forums? - SnowManZ 19:14:24 02/08/06 Thinly veiled as ever Ash. All hail to you. - SeedyROM 20:28:03 02/08/06 This is not controversial at all. It is very clear-cut. - Ash's Z 20:54:13 02/08/06 I don't think so. - Spee 01:23:05 02/09/06 it's been discussed several times. - Spee 00:58:27 02/09/06 what problem? - Spee 00:55:39 02/09/06 it seems like the info of something like that should be - SnowManZ 01:27:12 02/09/06 are you kidding? - Spee 01:35:37 02/09/06 I have mentioned it several times - ZEngineer 09:46:38 02/09/06 ohhh snap.... I was really excited about finally installing - Southern-Z (Little Rock) 19:32:37 02/08/06 Install the downpipes, install high flow cats. (n/m) - Dustin 19:58:51 02/08/06 Everyone run for the hills, the sky is falling. - SeedyROM 20:29:49 02/08/06 Snowman's car started smoking after installing downpipes. - Ash's Z 20:55:44 02/08/06 **raises hand** me too.. Now my turbo is seized... (n/m) - Waco300zx 00:31:58 02/09/06 mine didn't - Spee 01:42:26 02/09/06 it's not an isolated case *raises hand* (n/m) - ZEngineer 09:51:33 02/09/06 why are being a dick? I came on here - SnowManZ 21:46:51 02/08/06 I find it incredibly interesting that this thread got bumped - Ash's Z 22:25:35 02/08/06 Interesting indeed. The title of the thread, says that - SnowManZ 23:36:47 02/08/06 conspiracy! (n/m) - Spee 01:43:33 02/09/06 Word is the EPA damaged the seals so we'd all run cats! (n/m) - CaliguyPurdue 10:38:07 02/09/06 I think it belongs in Tech - Technomancer 09:10:57 02/09/06 Of course you do - SeedyROM 14:05:31 02/09/06 oh and FWIW - SeedyROM 14:32:11 02/09/06 ugh - Spee 01:28:38 02/09/06 just install them, if the car smokes, put the precats back - LJZTT 21:52:28 02/09/06 spoken like a true TT newbie... - Spee 16:17:17 02/10/06 I'd be curious to know if there is a link to this situation - Dave N 09:26:49 02/09/06
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