Mercedes V8 Inlet Manifolds

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Yet another redesign for packaging which makes it more adaptable, simpler and thus quicker & cheaper to build. It might even work better… A quick redraw & it’s back to the fabricator. Hoping this will all bring some major progress to the project!

 

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Taken from Bills thread about the Mampe 450SLC twin throttle:

So doing some very basic math using % hp vs capacity the following theoretical increases could apply if you made the same vintage mods to different engines:

370hp from 450cc

459hp 560

566hp 690!


If you do the same based on the AMG 500SEC (ITB):

454hp 500cc

510hp 560

628hp 690!

Note some people are sceptical those figures are accurate & actually inflated. However the drivers did report the cars chewed up racing slicks and you can’t do that with low power!

If you base it on % hp increase Std vs competition (73% increase):

519hp 300hp 560

495hp 6.9 Euro

431hp 6.9 US

460hp 6.9 AUS


Basing it on the Red Pig:

420hp 6.8

391hp 6.3!

The 6.3 is a little different since the std intake manifold was similar to the race version, whereas the std 450/560/6.9 intake was very different to the race version. So obviously the modified exhaust helped.

If you use the CW311 as a benchmark (with a single throttle), 375hp from 6.3L is 60hp per L. So a theoretical hp increase for the 6.9 using the same (old) tech would produce 414hp.

 

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Although in saying the 6.3s intake was similar to the race version isn’t totally correct since the race car had twin throttles. I doubt the exhaust alone could increase power by 100hp. So it’s possible the std engine’s throttle is also too small (like the 6.9). Other mods likely to contribute to the hp increase could include compression increase, cylinder head work (porting), bigger valves & modified cams.