124CC
Sr. Member
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Posts: 58
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« on: July 27, 2014, 07:30:35 AM » |
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I am ready to have a custom made exhaust system for my mild racing 124 sport coupe CC. The engine is a 1585cc one with twin 40 IDF carbs, Colombo Barianni 1st stage cams, Lancia Beta pistons (Compression around 9.8 ) and Ritmo 105TC cylinder head.
The problem is that I haven't got the knowledge of what would be the best solution for my setup (having in mind that noise is not such a big issue for a racing car) and I've heard so many different opinions from the local exhaust shops that I am confused.
I have a 124 AC/BC - 125 special (cast in number 4151276) manifold to use which is supposed to be the best among the OEM ones.
Regarding the material, I have two choices. Either a budjet iron, press bent, pipe or a mandrel curved inox one.
When the iron, press bent, one gets curved to the desired angle, the internal diameter at the curved section is reduced whereas with the inox, mandrel curved one this doesn't happen.
Does this affect the performance so much that it's worth spending the extra funds for inox?
Also what pipe diameter should be good and how many boxes in order to maintain some back-pressure (if back-pressure is necessary) for my volume of exhaust gas and for good flow?
Thanks!
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