Another F430 manifold quandary!!

[dvb247]

I received a PM from a fellow forum member that has made me consider my noise issue in a completely different way, now I've changes to AP Racing manifolds, could it be that my stock muffler could be breaking down inside? it is 10 years old after all?

I did check and I am pretty sure the rest of my exhaust is stock, so rather than go back to stock Mk2's, maybe I should consider swapping out the muffler? if so what should I get given that my issue is that it is to loud at 103/107db at 5k revs???

[dvb247]

No, they stay closed if you rev up slowly!

[dvb247]

Thanks Russell, very interesting, would I be right in assuming the "engine load" for a static reading would be ZERO, therefore I'm right in saying they are closed at 5 to 5.5k RPM??

Russell996 said:

They will always open, a light engine load and the manettino setting will keep them shut for longer.

[dvb247]

+1

gcpeters said:

excellent! care to share the contact as I could also be interested

[dvb247]

Yes, keep the originals and have the broken pipes repaired, some do with CAT some remove it when repairing the 4 into 2 weak points, look at my other posts and youtube videos, 99% of the time the stock manifolds break at the same point, it's never a CAT issue IMHO, simply remove the metal clam, repair and keep to one side or put straight back on, with the metal clam removed you can check them as much as you want, a huge plus point if you want to stay with stock parts, obviously you would need to use heat wraps but they only cost pennies.

Look at them, both broken at the same point