Capri 351w Twin Turbocharger install
Sept 18, 2000
(Under Construction)
Click on the pictures for a larger view
Some basics: Twin turbocharging isn't that difficult if you pay attention and try to build everything so it can come back apart. The headers took about 8 hours of looking and thinking and about an hour of actual work. All you have to do is think. Seems simple...
This shows the turbo header fabrication. This started out as a set of MAC unequal length shorty headers. I cut the intermediate flange off and trimmed the ball flanges to fit the 3" connector pipes.I set a 2" x 4" board on the frame rails and then mocked the turbos up so they would dump the exhaust towards the rear. I Then got a 3" test pipe from the local Meineke discount muffler shop. Being a 'test' pipe it had all sorts of bends and I was able to cut it apart and fabricate the header to turbo connector pipes. As you can see, the turbos are 'clocked' on there housings so they would dump the exhaust to the rear and the compressed air out to the intercoolers in front of the radiator. I had to make a spacer plate for the drivers side (on the left) so the exhaust would dump down vs up. As for the turbos, they are stock Mitsubishi TE04 turbos used on Chrysler 2.5l cars. They are nice and small to build boost and torque quick, and have 2.5" exhaust dumps allowing for some decent flow. I had to open up the exhaust housing after it proved to be too restrictive for the 351w's flow. Now it builds boost at 2,000 and flows all the way to 5,500rpm.
This is the basic turbocharger layout so get used to it. Both turbos feed from the fenderwells through '84 Tempo air box housings and intake tubes. Then they blow compressed air out towards the front through the old inner headlamp area and into the top of the intercoolers. Then the cooler air goes out the bottom and towards the passenger side through 3" Schedule 40 PVC tubing and up to the carb hat (not shown). The exhaust comes forward from the headers to the turbo exhaust housings, spin the turbine and dump down and back through 2.5" tubing. we couldn't fit 3" in there yet.
This is the rest of the exhaust. from the turbos it is 2.5" until it gets to the bellhousing, then it's 3" back to the Magnaflow mufflers. You can see straight through these things and the exhaust is really quiet, quieter than 3 chamber flowmaster and cats, but boy do they flow. There is a 2.5" crossover pipe right behind the tranny crossmember now (not shown) that mellowed out the tone even more. We had to clearance the passenger side pipe a little to get it away from the driveshaft. Someday we'll run the pipes all the way out to the bumper, but that's gonna be a long time from now. You can also see the first set of subframe connectors I made.
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