exhaust options

[static]

3" seems like about right for euro 3.2

smaller dia dual should be quieter and not as droney as single large dia due to resonance.

[matt]

Your collector could use some work. There's nothing wrong with clamps, also.

As for size, 3" is probably OK for a 300hp + euro motor. Run the motor's details through at www.headerdesign.com and it'll give you a better idea.

[Jason89i]

A prime example of how not to do it. Although the 3" exhaust ................... not sure how many times I'll have to say it... :hitler:
.

i admit, i know nothing about exhausts. with that said, i just completed a full single 3" for the s50b32. what is ideal for the euro motors? dual 2 or single 3? cheers, jason

clamps are temporary until i drive it a few days.
o2 hanging there is only for stoich meter.

[static]

just watched static's video...his setup sounds great.

:up:

http://video.google.com/videoplay?do...58971022829659

thanks, this is with stock e36m3 muffler btw

[e30polak]

i did it for the easier exhaust setup, and i plan on turboing the car in the future. the car is fast as hell, despite the slight power loss i might have received from going this route. plus the exhaust system turned out great this way, sounds sexy.

[Mr Deagle]

how is it costing me power? i really would like to know how opening up my exhaust would rob me of power. if you mean that i have lost back pressure, then i'm perfectly fine with that. the s52 produces a little too much torque for traction purposes, so i tried to counter act that with bigger exhaust, the obd1 intake manifold, and the 3.25 diff. i'm also planning on getting cams with in the next few months, which will take away some low end as well. but since it looks like you have a lot more experience with building up cars, i would like your input on the power loss with the turbo manifold.

you are running a turbo manifold on a non turbo car?????

WTF?????

[matt]

As far as flow is concerned the magnaflow E36M3 system uses dual 2.5's, that's behind the S50/52. Without doing a back-to-back evaluation between the different set-ups (dual 2.5's, single 3", dual 2.25's etc) or building a computer model to investigate the dynamic performance, its difficult to determine the optimal solution.

It's not hard to determine the optimal solution... www.headerdesign.com will get you started.

[JeffRR]

I'm planning on running dual 2.5's into a X-pipe then back to a dual 2.5" inlet /outlet magnaflow muffler. It seems like running the X-pipe will get you out of the rasp when not running a cats or resonators.

I'm running a OBD1 S52 with the stainless OBDII manifolds.

As far as flow is concerned the magnaflow E36M3 system uses dual 2.5's, that's behind the S50/52. Without doing a back-to-back evaluation between the different set-ups (dual 2.5's, single 3", dual 2.25's etc) or building a computer model to investigate the dynamic performance, its difficult to determine the optimal solution.

For reference I saw something on the a E36M3 race car (US spec, might have been PTG) and they were running dual 2.75" tubing.

[sefb222]

i'm using one of these, modified to fit...

http://www.uucmotorwerks.com/RSC36/

[matt]

With a turbo manifold, you have very short primary tubes (the first tube after the valve) and no secondaries at all. Also, every primary tube has a different length. This is the opposite of what you want in a header... long equal length primaries and secondaries.

There is a lot more that goes into exhaust tuning than just "opening it up." Exhaust velocity must be matched with mass flow potential, and the tubes need to meet in such a way that allows the pulses coming from the valves to pull each other along rather than just bumping into each other as they spill haphazardly into a massive pipe.

[e30polak]

how is it costing me power? i really would like to know how opening up my exhaust would rob me of power. if you mean that i have lost back pressure, then i'm perfectly fine with that. the s52 produces a little too much torque for traction purposes, so i tried to counter act that with bigger exhaust, the obd1 intake manifold, and the 3.25 diff. i'm also planning on getting cams with in the next few months, which will take away some low end as well. but since it looks like you have a lot more experience with building up cars, i would like your input on the power loss with the turbo manifold.

[matt]

A prime example of how not to do it. Although the 3" exhaust and turbo manifold may make some sense if you do plan on going turbo later.

Hey man u talk too much shit. I wanted to counter act the dual piping by going big enough with a single exhaust. My car doesn't run lean or rich, i have great throttle response, the exhaust note is guaranteed to be a hell of a lot nicer then yours, and i bet my header and exhaust system looks better and is made just as well as yours.:finger: Get off your high horse, tying to make it seem like you know it all, if you haven't seen it then don't knock on it. The quality of my turbo manifold is perfectly fine for the exhaust setup I'm running. The manifold is well made i guarantee you, don't be fooled by the price tag. On top of that, the route i went is easier, and much less restrictive then running stock headers. If you're ever in the LA area I'll show u how "bad" my exhaust setup is, as well as how well my car runs.

That's not the point... my point is that there is a right way and a wrong way to do things. Are you actually planning to turbo your car? If you aren't, your car will probably sound better and be more powerful with a stockish header system and a 2.5" exhaust. And if you are, get on with it. A turbo manifold will cost an NA motor a lot of power.

[matt]

condescending AND a know it all. wow, you're like jordan 2.0, which is too bad, because this board really didn't need another one.

Thanks! 8)

[hugh jass]

A prime example of how not to do it. Although the 3" exhaust and turbo manifold may make some sense if you do plan on going turbo later. Then again your choice of turbo manifold... not sure how many times I'll have to say it... :hitler:

Kudos on your spelling and grammar though, it really seems like you're working on it.

condescending AND a know it all. wow, you're like jordan 2.0, which is too bad, because this board really didn't need another one.

[e30polak]

[quote=matt;705416]A prime example of how not to do it. Although the 3" exhaust and turbo manifold may make some sense if you do plan on going turbo later.

Hey man u talk too much shit. I wanted to counter act the dual piping by going big enough with a single exhaust. My car doesn't run lean or rich, i have great throttle response, the exhaust note is guaranteed to be a hell of a lot nicer then yours, and i bet my header and exhaust system looks better and is made just as well as yours.:finger: Get off your high horse, tying to make it seem like you know it all, if you haven't seen it then don't knock on it. The quality of my turbo manifold is perfectly fine for the exhaust setup I'm running. The manifold is well made i guarantee you, don't be fooled by the price tag. On top of that, the route i went is easier, and much less restrictive then running stock headers. If you're ever in the LA area I'll show u how "bad" my exhaust setup is, as well as how well my car runs.