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Old 08-19-2016, 10:32 PM   #61
Mango
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^ Looks good, Russian. Coming along nicely.
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Old 08-22-2016, 12:52 PM   #62
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Finally installed the exhaust today. I cut the rear section of the muffler open along the original welds. Stuffed it with 5 lbs of coarse stainless steel wool, and closed it back up. The pipe is mandrel bent by a local company called upstream engineering. They did an excellent job and are really nice folks. The tube had to be butt jointed, so with mig welding I had to be really careful not to burn holes through the pipes. Welded it at about 90 degrees with the surface to reduce penetration and got a nice weld without and holes! For the pieces i was able to get inside of, I smoothed out the seam as mich as possible to have seamless transitions inside the exhaust tubing. Will have a start up video soon.
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Old 08-23-2016, 09:17 AM   #63
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First time I've seen someone make their own muffler. Interested in how it will sound.

Finished product looks great
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Old 08-23-2016, 10:35 AM   #64
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Originally Posted by Russianpegs View Post
Finally installed the exhaust today. I cut the rear section of the muffler open along the original welds. Stuffed it with 5 lbs of coarse stainless steel wool, and closed it back up. The pipe is mandrel bent by a local company called upstream engineering. They did an excellent job and are really nice folks. The tube had to be butt jointed, so with mig welding I had to be really careful not to burn holes through the pipes. Welded it at about 90 degrees with the surface to reduce penetration and got a nice weld without and holes! For the pieces i was able to get inside of, I smoothed out the seam as mich as possible to have seamless transitions inside the exhaust tubing. Will have a start up video soon.
Nice fabrication skills. I wondered if the steel wool will rust from the exhaust moisture?
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Old 08-23-2016, 10:57 AM   #65
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Nice fabrication skills. I wondered if the steel wool will rust from the exhaust moisture?

Stainless
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Old 08-23-2016, 11:05 AM   #66
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Old 08-24-2016, 12:29 AM   #67
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First time I've seen someone make their own muffler. Interested in how it will sound.

Finished product looks great
Thanks, I can't build a muffler at all. I'm just trying to make this one sound better, and I think I achieved that. Will have a video up soon.
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Old 09-10-2016, 09:19 PM   #68
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The car needs some finishing touches before it's fully ready to go, but I wanted to post an exhaust video so you can hear what it sounds like. Might have some onboard videos soon when I get this thing out to a track.

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Old 09-10-2016, 09:22 PM   #69
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Yes onboard videos soon!!! Sounds awesome


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Old 09-10-2016, 11:50 PM   #70
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Yes onboard videos soon!!! Sounds awesome


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Thanks, yes I will
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Old 10-25-2016, 11:32 AM   #71
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So lately I have been lucky to have an hour to spend to myself, very busy with life. But I managed to knock out a couple of things.

First, I installed a proper shift knob. The zhp knob feels shorter and heavier in comparison making shifts feel more cushioned. That's the best way I can describe it. I did like the knotchy-ness, longer throw of the lighter taller knob, but this knob looks better. Here's the before and after pic to illustrate my point.

Second, I measured the short term fuel trims, and found them to be relatively high. For those that don't know, the ecu measures the exhaust composition and adjusts the air fuel ratio accordingly. Lean exhaust (too much o2) = go rich command and add more fuel (positive values). If exhaust is rich, then correction for less fuel is made and the values are negative. With this information you can diagnose your car. Because I had relatively high numbers (10-13) I figured I may have a vaccume leak, so I took the manifold off, cleaned it, replaced old rubber components, resealed everything properly, and deleted the ccv system. I used pcv valve and an air oil separator in place of the ccv, so now the crank case gasses are filtered, and the crank case has more vaccume. After doing this I checked my short term fuel trim values and they decreased by a little bit (now 5-8) at idle. I am thinking the high flow cats and the alterations I've made to the engine (porting, bbtb, cai) influence these values.

Also while the intake manifold was off I cleaned my injectors. Using a 9v battery, some wires and tubes attached to some carb cleaner all 6 were flushed through. Yes, some were pretty dirty.

I don't know why but a problem I never was anle to diagnose was the engine warms up relatively quick. When standing near the engine I can feel more heat compared to when it was in the blue 330ci. Also, the electric fan is on all the time when I start the engine (even if it's cold).
I have no clue why the fan is always on, or why the engine runs hotter now. Maybe the ac delete? Maybe the radiator? (it's from an auto) Maybe the water pump or thermostat? any input would be awesome. Thanks
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Old 10-25-2016, 11:36 AM   #72
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At 78k miles, these injectors were due for a cleaning.
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