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Subject AshsZ-II Ultimate Street Z Progress: Turbo Inlet Pipes >>>
     
Posted by Ash's Z on November 26, 2005 at 8:48 PM
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Message Had a little bit of time over the holiday to put together the turbo inlet pipes for my Z. The lower location of the turbochargers in the engine bay due to the manifold design created an issue with using the OEM pipes, not to mention, the OEM pipes are terribly ugly - lots of impressions/dents in the pipe to get it to clear everything in the area.

I had two little pieces of some left-over 2.25" mandrel bent sections from a set of intake pipes I put together for Maglito's buildup which worked perfect for these inlet pipes. The i.d. of the pipe is around 2.125" with an o.d. of 2.25". The turbo inlet bolt flange has an inlet of 2.125", which makes a perfect match for this pipe. I used about a 60-degree section of the bend to rotate the intake pipe upwards and welded them into the second set of flanges I modified to allow me to fit the pipe inside of the attaching flange.

I didn't want to use 2.25" pipe any longer than necessary, so immediately out of the bend, a 2.50" pipe with a 45-degree mandrel-bent bend was slotted, tapered, welded, and ground smooth. The taper carried over 1.5" of length to provide a smooth transition into the final section of the inlet pipe. The ends of the inlets are sitting about 2" above the framing rail, which should be plenty of room for the engine to torque around in the bay without any interference between the pipes and the unibody.

Some may question why I even used a 2.25" pipe in there to begin with as this would seemingly create a bottleneck in the system. This would be a good observation, but consider that the compressor wheel's intake diameter (inducer) is only 1.86". I'm not positive on this assumption, but with having the large majority of the piping at 2.5" from the filters to this final section of 2.25" pipe will accelerate the intake air just before entering the compressor, which may have positive effects on the compressor's ability to work. The difference would probably be very marginal, but who knows? I'm pretty sure these pipes will work better than the OEM parts at least. :)

Here's the results:

To put a nice finish on them I will be powdercoating them along with all of the 2.5" piping that will go into the car for the induction system.

Hope everyone had a safe Thanksgiving!




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