MMP M62B44 Build Project "Jack-N-Coke"

[smalcol]

I don't think an x-pipe or anything after the manifolds will make much of a performance difference. Most of us already have nearly straight-through designs, different mufflers will tune the sound. I have a magnaflow, as seems to be the most common, a flow master will probably give you a deeper sound. If you want to go in a different direction use the M60 or early M62 manifolds. It's way more work, that's why everyone uses the late M62 or X5 manifolds.

[smalcol]

The M20 manifolds are just logs, but S52 manifolds are decent for shorties.

Only 1 of the M60's is try-y ;) which is something I found interesting.

Only the late M62 and X5 are this configuration. On the early M62 the manifolds are two pieces on each side, meeting in a y-pipe on each side.

[ForcedFirebird]

^ So, what are you going to do ?

He will attempt to drive it with clown shoes on.

[LJ851]

^ So, what are you going to do ?

[MonkeyMadness]

;)

[Denny]

It's an internet discussion forum... don't get butt-hurt. ;)

yeah the Dark side of the internet discussions that is ;) ok I just realized thats not very funny lol..

In all seriousness it is just the interwebz at the end of the day!

[The Dark Side of Will]

OK, sorry. I'll keep my mouth shut from now on.

It's an internet discussion forum... don't get butt-hurt. ;)

[Denny]

OK, sorry. I'll keep my mouth shut from now on.

Please don't... not one person on here doing an M6x swap that doesn't look up to you for leading real world experience with this engine on an E30

[ForcedFirebird]

Have you found gains in other areas of the exhaust on a stockish M20? Are the down pipes big enough? 2 into 1 exhaust superior? Or is the whole stock exhaust hard to beat?

RD headers>true merge y>2.5" Vibrant resonator>true merge y>Billy Boat e30 triple chamber made 157whp on a 200k mile m20 with a chip (no baseline on that one though :() That's .020" over well built Spec e30 engine territory, most high mileage m20's make 140-148 (even chipped).

Done derailing this thread, sorry, carry on Jeremy...

[/HIJACK]

[LJ851]

We aren't quite discussing the m20, but will tell you, shorties, do nothing over stock "logs" as you call them (more like tubular headers). I have dyno tested various headers on m20's, and the stock cast units are actually decent. Only until you get over 24" or so, will you see gains, and that's only in torque (best of 5wtq, 0whp to date).

BMW OEM exhaust was very well designed for being what it was, specially when we are talking about decades old, at that.

Have you found gains in other areas of the exhaust on a stockish M20? Are the down pipes big enough? 2 into 1 exhaust superior? Or is the whole stock exhaust hard to beat?

[ForcedFirebird]

The M20 manifolds are just logs, but S52 manifolds are decent for shorties.

We aren't quite discussing the m20, but will tell you, shorties, do nothing over stock "logs" as you call them (more like tubular headers). I have dyno tested various headers on m20's, and the stock cast units are actually decent. Only until you get over 24" or so, will you see gains, and that's only in torque (best of 5wtq, 0whp to date).

BMW OEM exhaust was very well designed for being what it was, specially when we are talking about decades old, at that.

[MonkeyMadness]

Lol.... no no please I have enjoyed this read. Very interesting and educational.

[JGood]

Well... I don't think he's interested in following the crowd...

I was just looking for some R3v input on it.

OK, sorry. I'll keep my mouth shut from now on.

[The Dark Side of Will]

Lol.... this is why I think I may go in a different direction altogether.

You weld... build some long tubes to get the most out of that blower.

[The Dark Side of Will]

Carry on with your theory, if that's what he's looking for...

Well... I don't think he's interested in following the crowd...