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Old 04-16-2011, 10:21 PM
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Dessertrunner Dessertrunner is offline
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Join Date: Jul 2005
Location: Griffith NSW
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Re: The perfect Intake/Exhaust concepts

Harvey in your calc's what have you got as the port diameters behind the valves?
Have you ever done a calc with a larger size for the intake diameter from the top of the head to the valves. The current area at the head is 1,500 sq mm if you ignore the cut out for the injector? From my stand point I have 42mm dia (is 1,400 sq mm) through the ram pipes at the smallest area.

If I remember my friction right two pipes with a total area the same as 1 can't flow as much air, does this mean that to keep constant volosicity the ports need to be bigger whaen they split in two?
Tony
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1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX.
1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC)
1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car.
1995 - SVX Green low k mint condiation.
1995 - SVX Rally car, ex Matts car. Now to be used on track.
1992 - SVX red & Black being converted to Mid Engine.
1995 - SVX Red 143,000 bit rough.
Owned 5 others Subaru back to a 1974 1400 GSR.
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