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MKTurbo new 2019 Pricing

Old 12-04-2018, 01:45 PM
  #1981  
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m2cupcar I did leave the clamps loose during assembly, but then I tightened everything down before installing the O2 sensor. During O2 sensor installation, I had to loosen everything again, but after that (even with clamps loose), I couldn't find a non-interference fit. Thoughts?
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Old 12-04-2018, 07:41 PM
  #1982  
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Originally Posted by Dwalk51 View Post
Has anyone had issues with downpipe fitment? I'm working with an NA 1994 Miata, MKTurbo kit purchased and delivered around August/Sept/October 2017.

Background: I'm putting the final touches on my install and part of that was recalibrating the O2 sensor and actually threading it into the provided bung in the downpipe. When I went to put it in, I couldn't fit the sensor into the bung in the downpipe without removing that V-band clamp next to O2 sensor bung to give myself enough clearance. Even then, with the sensor tightened in the bung, the top end with the wires was smashed into the transmission tunnel wall. Is that normal? I'll include a crude cross section drawing to illustrate. It may have something to do with the broken V-band clamp detailed below.

After installing the O2 sensor, I had to loosen all of the exhaust v-band clamps (muffler and turbo side) to create enough 'give' in the system to reattach the exhaust clamp next to the O2 sensor, and once that one was back on, I reattached the clamp at the muffler. I was on to my last clamp. At the time I thought this was the last bolt I needed to tighten before starting up my newly turbo'd car for the first time. And then the v-band clamp next to the turbo snapped in spectacular fashion while I was tightening it down, shearing the threaded rod with the nut still attached. I've attached a pic of the carnage (sorry if it's massive, I tried to resize it). When it snapped, the downpipe jolted downwards, leading me to think that I may have stressed the connection between the turbo and downpipe.




Has anyone else had similar issues with the downpipe not quite fitting right?? When I had everything hooked up but not tightened, there are two areas where fit seems to be an issue. The downpipe was forced up against the transmission (couldn't rotate any more) and the O2 sensor was smushed into the transmission tunnel wall. Even if I throw another v-band clamp on at the turbo, I'll still have these tight spots. Am I missing something obvious here? I appreciate any help/advice you guys my have.

Thanks,
Dylan

Shoot me an email.
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Old 12-07-2018, 10:53 AM
  #1983  
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Quick update, shot Lars an email and he's been helping me.

I originally set everything up loose and then started tightening down when the v-band clamp snapped. To make sure I'm not crazy, I went back and tried it again to see if I could wiggle things around for a better fit. No matter how I adjust things, the downpipe is stuck. The o2 sensor is in the way of where the downpipe needs to go for a non-interference fit. I think the o2 sensor is meant to fit more straight up and down, or angled toward the transmission instead of the tunnel wall. How are y'all's bungs pointed? I snapped this picture to illustrate:
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Old 12-07-2018, 11:00 AM
  #1984  
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Originally Posted by Dwalk51 View Post
Quick update, shot Lars an email and he's been helping me.

I originally set everything up loose and then started tightening down when the v-band clamp snapped. To make sure I'm not crazy, I went back and tried it again to see if I could wiggle things around for a better fit. No matter how I adjust things, the downpipe is stuck. The o2 sensor is in the way of where the downpipe needs to go for a non-interference fit. I think the o2 sensor is meant to fit more straight up and down, or angled toward the transmission instead of the tunnel wall. How are y'all's bungs pointed? I snapped this picture to illustrate:
Yeah generally they are a bit more pointed up then that. Not sure why I marked the spot for the bung that far over on yours.
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Old 01-08-2019, 08:18 PM
  #1985  
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Some potentially useful information.

I purchased this V-Band adapter (same one linked a few posts back that didn't fit) along with this turbo. I measured the compressor and exhaust inducer and exducers and it lined up pretty much exactly with what they have quoted on their page:

Billet Compressor Wheel Diameter: 53mm / 75mm
Turbine Wheel Diameter: 57mm / 65mm

Here's how the flapper fits:


A little close at the top but it looks like it'll work.

Shot of the billet compressor wheel:


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