Specially
prepared B230 Inlet Manifold
by Anthony Hyde
Outside and inside pictures show the result of 55 hours dedicated
hand crafting. This Volvo manifold was prepared in advance of fitting
a programmable engine computer. All the effort better be worth a few
extra horsepower ! -
3 beaut pics below
Good lighting is essential
to see exactly what your doing way inside. Spend some time setting up
lamps at both ends of runners.
The biggest challenge is removing the
two casting joins in each tube. Machines can't get deep inside these
curved oval areas, so the most effective way to scrape out casting
spots and irregularites in a controlled manner is by using special
hand tools. Progress
can be slow & tiresome, but
when you reach and clean up new areas, there is a feeling of
reward.
An 'S' shaped tool can be made using 1/4" copper tube, bent easily as
required. The burr-bit is fastened securely onto the tube end.
Radiusing the entry tubes (see pic) was
achieved with some fine half-moon type files, and finished off by
using fine sanding discs attached to a Dremmel type tool.
Final
finish was with fine bead
blasting. When metal finishing is complete, thoroughly wash out
manifold using hot soapy water and a bottle brush. To complete, the
outside surface
is sealed with Mr Sheen or Johnson wax spray /
polish, to keep it looking good
for years.
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B230
INLET MANIFOLD ANATOMY
This trick shot was taken
using a 'fish eye lens' on a digital
camera.
The view is from where the
throttle body attaches to the manifold plenum. Notice how
every edge and transition has been rounded off.
'Flow through' would be far
more laminar (smooth).
Thanks for visting,
Anthony Hyde
For fittment information
see:
B21/B23
to B230 Turbo Intake Manifold
conversion
- by Stu Spencer, TurboBricks
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THROTTLE BODY - being
machined (bored out) in the lathe. A face or mounting plate
needs to be made first.
At the same time, the
outside 'hose clamping surface' is machined round and a lip
improved.
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