March 24, 200620 yr Just replaced some exhaust on a 93 loyale, and found this.... http://img233.imageshack.us/my.php?image=oldexhaust1251kp.jpg A section of pipe (about a foot) was intentionally "crushed" to less than 1 and a quarter inch!:cool: So the mechanic did this with a REAL 2 inch... http://img230.imageshack.us/my.php?image=newexhaust24aj.jpg He bypassed old flange entirely, and was confident about it.... theres also a 24 inch glasspack after new section of pipe (flow tech red hots). ECM is takin awhile to adjust but it is doing so. The most unique sound I have had yet from an EA82 besides duals.
March 24, 200620 yr its really tiny in front of the second cat! im sure theres something to be gained there at the flange area on my car its a cat
March 25, 200620 yr Author The flange seems to be necessary (even tho mine was stuck for years). I broke the y pipe on a short trip just an hour ago. There is a way to make original flange to work with new pipe without bottlenecking. I just can't get away without it. I had no idea that was a second cat, that was replaced by glasspack, all i find is "sound resonator" (resignator) or "center muffler" ... I wonder if I am illegal exhaust :-\
March 25, 200620 yr The flange seems to be necessary (even tho mine was stuck for years). I broke the y pipe on a short trip just an hour ago. There is a way to make original flange to work with new pipe without bottlenecking. I just can't get away without it. I had no idea that was a second cat, that was replaced by glasspack, all i find is "sound resonator" (resignator) or "center muffler" ... I wonder if I am illegal exhaust :-\ i dont know your states rules. federally perhaps
March 25, 200620 yr i don't know how strict youyr inspections are where you are but i passed emmissions includeing 3 visuals with 2 out of 4 indicator lights on and no pcv system on my chevy
March 25, 200620 yr Author I know these EA82's are very small stroke.... but 1.25-1.5 inch exhaust seems way absurd (dangerous heat?).There are 1100cc motorcycles with more emphasis on exhaust size and route than this 1781. After changing to larger it ran cooler, a little more power from the get-go, and the sound i was trying to kill was way in back of the car instead of buzzing my head thru the shifter. Another point is the 9.5:1 on spfi getting same exhaust as lower compression EA82.Mass production's "who cares, we saved a buck" attitiude is in alot of cars. I got a better look this morning, it is simply broken and not dangling (hung well), i wonder if welding smoke excited convertor into too hot for the 13 year old y-pipe. These things can be dangerously tricky... Give .25 more on pipe, and all kinds of little thinks had to be changed (including idle/air mix, reset ECM, maybe even timing). It broke climbing a rather bumpy steep hill, I'd swear the sound was like 20 ft in back of the car before pipe broke (odd to comprehend). It was probably on fire
March 25, 200620 yr the y pipe itself has some lame welds that impede air flow right at the exhaust port. you might want to spend some time grinding those welds.
March 25, 200620 yr Author Definately crap weld, one side (ironically still together) doesnt even appear to be welded, I can see the edge of the pipe at convertor connection, no weld noticable (unless I'm blind)! That is right where it broke. I guess putting demand on it revealed its weakness. Give an inch, fall apart for miles .. Darn those famous sayings.
March 27, 200620 yr Author I really dont want to keep this post babbling on, but here is final result. (it really does need the flange with springs in other words) The y-pipe or another exhaust peice will break without it.The new 2 inch pipe fit exactly over remains of flange for tight easy weld (cheap upgrade!) Here is pic: http://img207.imageshack.us/my.php?image=newexhaust0394ei.jpg
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