16v vs 8v exhaust port spacing and placement
#1
Burning Brakes
Thread Starter
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Is the spacing for the 16v exhaust ports identical to the 8v. Could one change flanges to use a 16valve header on an 8v head?
#2
Rennlist Member
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There are other issues other than valve spacing. The return water course is different for the 2.5 liter heads and the 2.7 / 3 liter heads. I modified a 3 liter block to take the 2.5 liter head so going the other way should be possible. You mat have to make a variety of mods though.
#4
Burning Brakes
Thread Starter
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No. I saw a nice equal lenght header for a turbo converted 3l head and though perhaps it could be easily adapted for a 2.5l
http://grabcad.com/library/porsche-9...haust-manifold
http://grabcad.com/library/porsche-9...haust-manifold