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I was not suppose to make another turbo manifold, its a big job. On the
other hand I wanted to see if I a bigger turbo could have a pressure
take up almost as good as the smaller one if the manifold flow was
optimised as much as possible. Still producing more power.
The other reason was, that it could be fun to see, what the car can do
on a strip. To run a ¼ mile we need top power.
Smaller pipes now dia. 34 mm instead of 38 mm was used to
get the airspeed up and a super collector to get it down into the
turbine. After a lot of difficult welding work and 60 hours later, it
took the first run.
First run was without Power Wrap. The manifold exhaust
temp. just whent to 650 deg C at 1.5 bar. The smaller turbo got to 950
deg C at 1.5 bar (with Power Wrap). The pressure take up came in
about 550 RPM later. I was a little disappointed. But...
With Power Wrap the temp got to 850 deg C at 1.5 bar and this came in only
approx. 350 RPM higher than the smaller turbo. |
