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pressure drop gauge (link) Posted by Kevin K [Email]  (#374) [Profile/Gallery]
(more from Kevin K) on Fri, 16 Jul 2004 08:55:14
In Reply to: heres my temporary FMIC idea, jak  [Profile/Gallery]
, Thu, 15 Jul 2004 14:12:18
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the dsm IC's were tested and had high dp due to the small inlet and outlet pipes ... common upgrade was larger ins and outs welded on. Starion drop could be even higher. Leaf blower IC tests are at low flows, and are of limied value.
I use a dwyer gauge to check drops, and recommend the one in the link. you need to tee in a check valve (pep boys 'help' part) near the gauge if the low side is connected to the manifold, to avoid pegging the needle with high vac's.
easiest to check system drop, from turbo to manifold. I also make nipples to check other locations. used 1/8 dia thick wall alum tubing from true value hw, cut threads at one end, and tapped small holes in the inlet and outlet pipes of the IC, or other places of interest. then used epoxy and threaded these nipples in, flush with bore. use std rubber caps and wire ties when not in use.
I measured 1.4 psi max across earliest 900T core design at about 8 psi on 83T.
High intake/IC system drops increase power consumed by turbo and raise pressure ratio for a given flow point, which makes turbine spin much faster and, most importantly, needlessly raises the exh manifold back pressure by at least 1.5 times the system drop, which drops the net engine VE and significantly drops engine hp.
Can also use gauge to accurately check pressure drop at intake, in inches of water.
With all the good testing and design work you do, this would be a good tool to own.
posted by 52.128.3...
dwyer 5.4 psi differential gauge
, Thu, 15 Jul 2004 14:12:18, Sat, 17 Jul 2004 20:07:57, Fri, 16 Jul 2004 08:55:14 <-- Viewing This Message, Fri, 16 Jul 2004 13:07:23
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