lukr Posted February 13, 2004 Share Posted February 13, 2004 I was changing the exhaust gaskets on my 82 brat last weekend and saw this thing between the head and the exhaust pipe and wondered what it is and what it does? I assume it has something to do with emissions. Can I chuck it when I have a new exhaust put on my brat? Quote Link to comment Share on other sites More sharing options...
speedbump Posted February 13, 2004 Share Posted February 13, 2004 johnson rod ? hahahahahaha!!! Quote Link to comment Share on other sites More sharing options...
subiemech85 Posted February 13, 2004 Share Posted February 13, 2004 I am guessing it is the resonator, a type of quieter, looks like over-grown sausage stick you can remove it just a guess, vauge description, no pic Quote Link to comment Share on other sites More sharing options...
ShawnW Posted February 13, 2004 Share Posted February 13, 2004 Its a heat riser that goes up to an "air suction valve." They have been removed by people before but they don't really hurt anything in my opinion. Quote Link to comment Share on other sites More sharing options...
Snowman Posted February 13, 2004 Share Posted February 13, 2004 The ASV system dumps air into the exhaust to help the cat burn unburned hydrocarbons better. Aside from emissions, and maybe decreasing the exhaust temps (why that would matter I don't know), I can't see where it has any use. The only reason I'm keeping mine on is in case I have to pass IM sometime. Quote Link to comment Share on other sites More sharing options...
Flowmastered87GL Posted February 13, 2004 Share Posted February 13, 2004 LUKE!!! I've been trying to get ahold of you regarding some Weber carbs. I run my GL in the rallycrosses in case you didnt recognize me. Please e-mail me at the_great_mikeholio@yahoo.com Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted February 13, 2004 Share Posted February 13, 2004 The AIS is what you are looking at - blocking it off is good if you don't have to pass emissions because they can fail, and dump a whole load of plastic from the "silencer" into your carb.... not cool. Also - I ran through emissions with it both on and off, and I actually got higher readings with it enabled. You can easily disable it by disconecting the valve, and putting a quarter down in the outlet, and threading the pipe back on. It will still *look* stock too - just won't work at all. And it can't fail this way either..... Also - if you have a small exhaust leak somewhere in the Y pipe, the ASV will bring in enough extra air to cause really horrible backfireing.... something I have personally expereinced, and fixed using the quarters (thanks to Qman's advise....). GD Quote Link to comment Share on other sites More sharing options...
Syrinx Posted February 13, 2004 Share Posted February 13, 2004 Luke- I didn't know you made it to the board! E-mail me, i have some questions for you.... Kurt Quote Link to comment Share on other sites More sharing options...
Mike W Posted February 13, 2004 Share Posted February 13, 2004 When I Weberized my car, I disabled the AIS but left it on the car. My plan at the time was that when I needed to pass emmissions I would temporarily install a smog pump where the A/C used to be. It'd blow air into exhaust and help burn the hydrocarbons in the cat. Haven't tried it, don't know if it'll work. Quote Link to comment Share on other sites More sharing options...
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