575M Build

Damn Nick can't believe we both got into the front engine Ferrari game... I have the Grigio Murci Roadster from Canada that was down at Newport for service a few years back! I assume youre still rocking the manual LP?

 

Nick- The principals I outlined above are well documented. The V12 is a model of efficiency for exhaust scavenging because of the evenly spaced exhaust pulses. The analog to this is the flat crank V8, which also offers superior scavenging to a 90 degree crank V8 because it is two four cylinder engines on a common crank. A 90 degree V8 is four V-twins on the same crank and needs a bundle of snakes exhaust for good scavenging, not usually possible on production vehicles.

So if you want maximum efficiency on the exhaust you are proposing, keep all the exhaust pipes on the same side. Crossing them over will cost hp and torque. If you need hints on how to do this, look at Fabio's headers or at the headers on a 599 GTO. Part of the 599 GTO's extra power came from a 6-1 exhaust compared to the 599 GTB's 3-2-1 exhaust, combined with eliminating the precats and using lower backpressure primary cats.

None of this is anything new and is well described in engine design literature. 599 GTO exhaust below.


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And like I said, well understood basic principles that are unaffected by your variables, all of which are secondary effects if the basic principles are followed. Why reinvent the wheel when we know round wheels work best? What have precats got to do with tubular headers? Methinks you are just blowing smoke.

 

Nah, wasted enough time on this one.

 

Thanks for the treatise on BMC filters and tinting, though.

 

Kind of lost interest. Too many things I would not do to my 575. Some I have done you would likely not like, either.

 

Agree that there is value in looking beyond the existing doctrine if you want to move the game on, but the counter argument is that this (meaning the exhaust stuff) isn't new ground. Please don't take that to mean we don't like hearing about this stuff- always cool to see someone's project car come to life as they make it their own.

Will there be dyno runs to prove the exhaust mods deliver? Be a good way to silence the non-believers.

 

Well said.

 

Lol its funny Nick and Taz that you guys got off on the wrong foot because youre both great guys and both are similar in finding new alternatives to modernize and improve old designs. Nick developed a lot of skunkwork improvements on Diablos and Murcis. As has Taz on the 550/575's. You guys should bury the hatchet. Nicks come up with some bad mother exhausts on a few cars in the past. Anyways thats my 0.02 but between the two of you there is a TON of knowledge.

 

RE: passenger side wiper arm
Cut the arm about a half inch behind the rectangular hole, bevel edges to get good penetration, turn end over and weld back together. TIG brazing with silicon bronze rod works well. Grind/file smooth then repaint. Install Bosch Icon 24A blades on both arms.

 

Looks neat! Curious about drone when all said and done

 

Sounds amazing


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Damn Nick that was quick, great job!

 

Is the crossover and x pipe to synchronize the pressure waves with the firing order and promote better scavenging?

If so, how much power have you calculated you will gain with the current camshafts? Are the current exhaust pulses colliding due to the firing order?

If not colliding, and not for synchronizing the pulses, can you help me understand the purpose of the primary crossover pipe and the secondary crossover pipe (x-pipe)?

In addition, have you calculated the reduction in velocity by increasing the diameter of the pipes? Will there be a net increase in flow? Or will the increase just handle more volume as the gas expands in the pipe and slows down?

Thanks


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I’m a bit skeptical this will result in higher peak power, but maybe you’ll get more lower down. Genuinely love to be proven wrong though, and looking forward to the results regardless.


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