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Thread: 1997 E36 M3 Sedan LS1/T56 Swap

  1. #26
    Join Date
    Apr 2012
    Location
    Florida
    Posts
    184
    My Cars
    2008 M5
    $475 is a steal. Would appreciate an image if you get a chance. I've not had much luck with exhaust shops...either costs me more in the end for a poor job or pay top dollar for quality. I need to stop by there next week. Your thread is very helpful...more questions surely will follow as we start to pick up speed on our 97.

    Thanks!

  2. #27
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    Of course I don't get around to taking the picture until it's filthy but here you go.....

    Attachment 619005

    Sorry for not posting that earlier, I've been all over the place. As for how it sounds, if there's someone in Houston that can help out with making and posting a video, I would appreciate it. Otherwise PM me and I can text you a short one while driving.

    I've been daily driving it this whole time with no big issues besides the remaned alternator crapping out on me and the alignment shop stripping one of the rear trailing arm bolts by using an impact gun to tighten. There's still a small drain on the battery. It sat for four days and was a little weak when I tried to start it. My next trip was going to be over a week so I disconnected the battery. I haven't had time to mess with it.

    So, I've decided to fix the tapping lifter by swapping in an LS3. One came up on CL for the right price and I couldn't help myself. The plan is to preemptively replace the lifters and swap in a mild Cam Motion cam. I had great luck with Cam Motion in the past and I regret not using one of their cams in the current motor. I have a few items to check off my ****-to-do list but I'm hoping to have the LS3 wired and ready to go in by the end of January.

    Good to see everyone's making progress.


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  3. #28
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan



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  4. #29
    Join Date
    Apr 2012
    Location
    Florida
    Posts
    184
    My Cars
    2008 M5
    That is a nicely executed system...especially for the price. Why did you chose dual 2.5's? What is the PN on the Borla muffler?

    Lifter tick fix > new LS3...the HP increase will be nice. We were tempted on going with the Gen IV motor, but price was a good $1000 higher. It is a better option though.

    Geeky question, but how is the mileage on your setup?

    Thanks for posting!

  5. #30
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    I chose 2.5" because it made things easy, I guess. The mid-section is made of 60mm pipe which is slip fit with 2.5" pipe. That way I was able to put two 60mm pipe stubs in the same clamps I was using for the OEM cat-back and build off of that with 2.5" and still have the option of bolting the OEM cat-back back on if I wanted to.

    The muffler pn is 400286. The only problem was that the inlets and outlets were a little too far apart, which is why the one tailpipe makes that little kick before passing through the bumper. I'm trying to decide wether to polish the tips or buy tips but kind of leaning towards polishing.

    My first impression was that the mileage wasn't great but that was making a 15 minute daily commute and getting on it at every opportunity. It seemed to improve a lot with more time on the highway. This is just eyeballing it though. I haven't calculated.


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  6. #31
    Join Date
    Apr 2012
    Location
    Florida
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    184
    My Cars
    2008 M5
    60 mm to 2.5 in...gotcha.

    Do you think a single 3 inch fit ok?

    Appreciate the part number-gives me another data point for muffler sizing.

    Can't believe I asked about mileage...the world has changed!

    Thanks!

  7. #32
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    I think single 3" would fit just fine but I think it might be a little restrictive for a 425-ish hp LS, but that's just speculation. I can see it being worth it if you really want to keep it quiet.

    I think I'm going to try an exhaust termination box in place of my x-pipe after it's back on the road with the LS3. I'm hoping to take some of the V8-ness out of the sound at low speed/idle and maybe pick up some hp. That's a long ways off though.

    Believe me, if I was still making the 1hr commute I used to I would be just as concerned about mileage. I think it also takes some time before you stop hammering on it every chance (maybe?) to get some accurate mileage numbers. I'm sure it will be decent, in the low 20's hwy and high teens cty.



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  8. #33
    Join Date
    Mar 2004
    Location
    USA
    Posts
    3,116
    My Cars
    96 328is 6.0L
    Here is what my LS1 swap used to do on hwy



    Afer I swapped my LS1 to LS2 it went down to about 28-29hwy

    At the track I get between 4-7mph
    - 96 328is 6.0L. (LS1 to LS2 build thread: http://forums.bimmerforums.com/forum...ad.php?2098938)
    - 96 328is 5.7L. (LS1 build thread: http://forums.bimmerforums.com/forum....php?t=1289987)
    - 95 ///M3 6.0L. (LS2 build thread: http://forums.bimmerforums.com/forum....php?t=1619249)

    - 97 ///M3. (e46 Fender Flares/track car build thread: http://forums.bimmerforums.com/forum....php?t=1727098)
    - 96 328is (Dual Fuel Pump to Surge Tank thread: http://www.bimmerforums.com/forum/sh...ad.php?1964025)

  9. #34
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    How is that system calculating MPG?


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  10. #35
    Join Date
    Mar 2004
    Location
    USA
    Posts
    3,116
    My Cars
    96 328is 6.0L
    Through OBDII using GM PCM.
    - 96 328is 6.0L. (LS1 to LS2 build thread: http://forums.bimmerforums.com/forum...ad.php?2098938)
    - 96 328is 5.7L. (LS1 build thread: http://forums.bimmerforums.com/forum....php?t=1289987)
    - 95 ///M3 6.0L. (LS2 build thread: http://forums.bimmerforums.com/forum....php?t=1619249)

    - 97 ///M3. (e46 Fender Flares/track car build thread: http://forums.bimmerforums.com/forum....php?t=1727098)
    - 96 328is (Dual Fuel Pump to Surge Tank thread: http://www.bimmerforums.com/forum/sh...ad.php?1964025)

  11. #36
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    Should be pretty damn accurate then as long as distance traveled per VSS pulse is correct.

    I know the place that did my start up tune was not given my final drive ratio or tire size so the OBD2 MPG reading would be wrong in my case.


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  12. #37
    Join Date
    Mar 2004
    Location
    USA
    Posts
    3,116
    My Cars
    96 328is 6.0L
    Whoever was doing my tune asked the final drive and tire size. Also odometer and gas station pump was confitming the readings too. Pretty cool when my cousin in his M3 had worse mpg then me.
    - 96 328is 6.0L. (LS1 to LS2 build thread: http://forums.bimmerforums.com/forum...ad.php?2098938)
    - 96 328is 5.7L. (LS1 build thread: http://forums.bimmerforums.com/forum....php?t=1289987)
    - 95 ///M3 6.0L. (LS2 build thread: http://forums.bimmerforums.com/forum....php?t=1619249)

    - 97 ///M3. (e46 Fender Flares/track car build thread: http://forums.bimmerforums.com/forum....php?t=1727098)
    - 96 328is (Dual Fuel Pump to Surge Tank thread: http://www.bimmerforums.com/forum/sh...ad.php?1964025)

  13. #38
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    Gotta love getting more power and better gas mileage at the same time.

    So, I decided to be constructive with my day off and put up some 2x4's in the rafters of my garage to support a pipe which then holds a chain fall. This is to facilitate lifting heavy things like engines while my engine lift is being borrowed/stored by my friend who also helped with putting this all together today. And yes, I'm become the "hangs s$&t everywhere because he ran out of room for all his junk" guy.


    The L33 that I bought just in case I want to do a turbo build one day got torn down to the short block. Thankfully the cylinders all look great and only need a quick hone when the time comes to build it.




    And up went the LS3 on the stand, ready to be torn down.


    Now I just need to get the temporary daily driver UrS4 squared away. Finally got all warning lights off on the dash which if any of you have ever owned a VW/Audi know that's an achievement.


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  14. #39
    Join Date
    Feb 2011
    Location
    Houston, TX
    Posts
    82
    My Cars
    1997 M3 Sedan
    Got the LS3 torn down to the short block today. Everything looks great. It is spotless under the valve covers.


    Now it's time to start buying parts.....


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  15. #40
    Join Date
    Apr 2012
    Location
    Florida
    Posts
    184
    My Cars
    2008 M5
    Modern engines are works of art. Those ports are impressive. Extra engines are always reassuring...:-)

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