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Home > Mazda > Miata > 1990 > Bob's Mazda Miata
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bbundy
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Member ID: bbundy
Location: Anacortes, WA
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1990 Mazda Miata
Bought: Jan, 0001
Sold: Jan, 0001
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2006 MAZDA MIATA GRAND TOURING 6 SPEED ONLY 9K MILES! $10,100.00
BLACK MIATA CONVERTIBLE 5-SPEED COLD A/C $9,777.00
2002 MIATA LS AUTO LEATHER BOSE NO RESERVE! 02 BLUE $4,550.00
MazdaSpeed Only 47K 6 Speed Upgrades Gorgeous!! 45 Pics $10,000.00
2000 Mazda Miata MX-5 CONVERTIBLE CLEAN RECENT TRADE $5,100.00
Last updated: Oct 02, 2009
Hits: 19,574
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New Downpipe for FMII
The old style FMII downpipe after about 10 weld repairs over the several years just couldn?t be made to not have an exhaust leak for any length of time anymore. Downpipe cracks were responsible for melting numerous things in the engine compartment including the cruse control, master cylinder, a couple of coolant lines, and link map sensor case.
The original design was 2.25? pipe out of the turbo with the waste gate dumped right in at the sharp bend just out of the turbo. Down about 10? there was a slip joint where the pipe went to 2.5? originally it had a section just after the flex joint that went back to 2.25? in order to fit in a stock cat. I had previously replaced that part with 2.5?
New Downpipe.
2.5? all the way from turbo Outlet Divorced waste gate flow path No slip joint. A wedge was cut out of the 2.5? pipe at the flange in order to neck it down to the 2.25? turbo outlet. Pockets were cut out and filled in around the lower mounting stud holes in order to have enough clearance to get the nuts on and a section of tubing was extended into the pocket of the turbo to fully separate main turbine exhaust flow preventing it from being impeded by the waste gate flow. The waste gate flow goes out its own 1.5? pipe and re joins about 16? further down the main pipe.
Displaying entries 1-5 of 12
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Posted by: StolenHeron
04/13/2009 07:11AM
tight miata, 5 stars, come check out my 2004 Land Rover Discovery II SE7 sometime.
Posted by: pdexta
04/12/2009 07:26PM
Awesome car man, looks sick. 5 stars!
Posted by: SeanSL
03/14/2009 11:37AM
Great Job! I really like how you re-routed your cooling.
Posted by: BentCarGuy
01/04/2008 12:17PM
Hey man, SWEET Miata. I saw the downpipe you made for Lances 323 GTX and was wondering what it cost to make that?? I have a 91 MX6 GT with the same turbo, and I could benefit from that same downpipe, or at least one VERY similar. Let me know! jgro1976@gmail.com. Thanks! Jason
Posted by: paulplxdevices
12/06/2007 02:21PM
Hey Nice Ride! I noticed that you have a wideband o2 setup in your car. I'm with PLX Devices and we're looking for nice cars to sponsor with our new gauges. We have some new 52mm and 60mm programmable gauges. Check them out on our website (www.plxdevices.com) if you're not familiar with our new offerings. If you're interested please email me at paul@plxdevices.com
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