In Soviet Russia car build YOU!
#823
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Today, I made a downpipe bracket. The purpose is the bracket is not to support the weight of the downpipe, but rather to restrict it's movement. Since it's all V-band, it can rotate, if, for example, part of the exhaust hits a speed bump.
![](https://www.miataturbo.net/attachments/build-threads-57/56711-soviet-russia-car-build-you-dsc_2190.jpg?dateline=1349407906)
I made it out of a 3" exhaust clamp and a 6" T strap bent 90*. The strap is like 12 or 14 gauge galvanized steel, so it's sturdier than it looks in the photo.
exhaust clamp - Buy Rol Exhaust 3" Heavy-Duty Muffler Clamp 517300 at Advance Auto Parts
t-strap - 6 in. T Strap-66T at The Home Depot
All the holes even lined up - I didn't have to drill anything, just trim the edge of the strap.
I don't know how I feel about using that bolt on the transmisison.... technically it just holds the transmission bellhousing.
![](https://www.miataturbo.net/attachments/build-threads-57/56711-soviet-russia-car-build-you-dsc_2190.jpg?dateline=1349407906)
I made it out of a 3" exhaust clamp and a 6" T strap bent 90*. The strap is like 12 or 14 gauge galvanized steel, so it's sturdier than it looks in the photo.
exhaust clamp - Buy Rol Exhaust 3" Heavy-Duty Muffler Clamp 517300 at Advance Auto Parts
t-strap - 6 in. T Strap-66T at The Home Depot
All the holes even lined up - I didn't have to drill anything, just trim the edge of the strap.
I don't know how I feel about using that bolt on the transmisison.... technically it just holds the transmission bellhousing.
#825
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I also had a small issue with, what appeared to be, minor misfire/hesitation at WOT. I changed spark plugs and it went away. Plugs looked good BUT first plug hole had oil in it. Uh-oh. Turned out I just spilled some oil in it
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Compression tested the first cylinder and it's still at 170psi. So no problem.
FYI these spark plugs - NGK Spark Plugs 4091 - NGK Racing Spark Plugs - Overview - SummitRacing.com - resistor-less NGK
#828
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did a few pulls, tried a timing map faeflora made me (a little bit more timing everywhere) and tried virtual dyno. car runs like a champ although exhaust still makes some odd noise... I thought it wasn't hitting anything anymore QQ
red is 13-20* timing, blue is flat 11* and slightly rich AFR in top end. This is 4th gear.. unfortunately the app is semi-broken... have to use NB profile becase no option for 6spd NA, lol.
![](http://s95367906.onlinehome.us/photo/mt.net/build/virtual-dyno.png)
oh and knock is exactly the same for both maps. so I'm happy.
red is 13-20* timing, blue is flat 11* and slightly rich AFR in top end. This is 4th gear.. unfortunately the app is semi-broken... have to use NB profile becase no option for 6spd NA, lol.
![](http://s95367906.onlinehome.us/photo/mt.net/build/virtual-dyno.png)
oh and knock is exactly the same for both maps. so I'm happy.
#832
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Drove the car to work this morning and now I have 4x the knock for some reason. Went from 6-8% knock @ 2500rpm cruise to 20% knock @ 2500rpm.
There is a new exhaust noise and I think sensor picks it up as knock