What did you M30 owners out there do for exhaust. Specifically I am concerned with the muffler. Did you use a stock E30 muffler or did you use the M30 muffler and if so how did you mount it? That seems like the E30 muffler would be a huge bottleneck in the flow but I dont know. The pipes are smaller if nothing else. I am probably just going to go buy some 2inch pipes and make my exhaust but I wanted to see what others did first. I am probabbly going to remove the cat all together and call it good. Anyone do anything special? I suppose straight headers is not an option anymore.
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haha I was just messin but I'm glad you are gonna toss them. You want a dynomax or magnaflow universal muffler. You can have a shop weld it in for you. The dynomax is like $40 and sounds great, not to mention it is a turbo muffler so it will flow good.///Alpinweiß II 24v 91' 318is, Alpinweiß III 99' 323i, 04' Yamaha R6 SE for sale, 00' VW GTi, 83' El Camino BURNED, 01' P71sold, 92' Miatasold
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I got a magnaflow 14833 series muffler and am going to do straight pipes 2.5" down... i got a guy to do a custom job for me using autozone 45* bends... i'm gonna go single 2.5" all the way through..
I dont know how he's going to mount the muffler, but you can always just weld a piece of steel rod to the body of the muffler (the ends of it) and just make a loop to go into the stock rubber E30 muffler hangers...Recent Rebranding!!
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Guys,
if any of you used the motormounts (type II) from e30.de, did the stock downpipes clear the engine mount??Recent Rebranding!!
Visit Garageaholic for all of your E30 Swap Needs!
E30 SM62/S62
E30 M60 V8
E30 M30 Big 6!
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My first project i used Magnaflow and m30 down pipes and "Y" them together and put my O2 sencer right after the "Y" right under the car 2 1/2 pipe NO cat, But I knew I would be doing some intake work that is why I chose 2 1/2" when I was done I added Throttle body,intake manifold for more breathing the car sounded really nice with enough power. The turbo was a diffrent story.
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Looks like 2.5'' pipe is the way to go. I think I am going to run the stock M30 downpipe and butt joint on some 2.5'' pipe. Then I am going to Y that where the cat would be put the O2 behind that and run a single 2.5'' pipe to the stock E30 muffler. I guess I will have to Y it again because the E30 muffler is dual pipes I believe. Does that seem like it would produce good unrestricted flow? I dont care much about the sound just the flow.
Did you guys have to use any huge bends? I cant image you would. I think 45 like M3fan4eva used would be all that you need. I assume I will follow the stock path and just run the pipe.
How hard is it to bend steel pipe? I have never bent it before... well except for break lines but that is different I assume. If I just use a big version of a break line bender will that work? Should I heat the extending side first? I assume I will use 2.5'' 16 gauge pipe. Any thoughts on this?
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if you use 2.5" pipe that is a little big so if you have little restrection it should work good. (I would use 2.5")
The exhost is the only part this swap that if you want it perfect then you will have to spend the money, That is you find a shop that build's exhost for race cars.
I had my step dad build my exhost he also works on a race team.
when I had my exhost done both times first thing they did was mesure the throttle body to find out how much air was going in and then some formula for the intake/stock head they had to add in with that any way $600 for the exhost and a used magnaflow 2 1/4 so he made it fit
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Ok, here's what im going with and i'm welding it up next week. 2.5" from the stock headers, then down to a y pipe... then putting a flange (so i can disconnect it if i need) to a high flow cat. then 2.5" single all the way to my magnaflow muffler.. Sticking with that and we'll see how it goes... can't wait...Recent Rebranding!!
Visit Garageaholic for all of your E30 Swap Needs!
E30 SM62/S62
E30 M60 V8
E30 M30 Big 6!
Check out this E36 N54 Swap Build
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Youtube.com/garageaholic
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