430 Engine repair technical information

I dont understand what you r asking to be honest

 

This guy may have what you need by now since it seems to me he may have been effectively asking the same question a couple of weeks ago

https://www.ferrarichat.com/forum/threads/f430-engine-workshop-manual.613361/

 

I do not know if there is an official Ferrari position on this. I do not think the factory will admit this can happen. Reversion is a theory who's evidence is cat break off material found in the intake. This was a big 355 issue and the issue started there. It has to do with valve overlap as during this time intake and exhaust valves are open. Mixture control issues made for high heat which burnt out oem headers and ate cats and the results were destroyed headers, reversion particles, destroyed valve guides. The factory answer was steel guides and new factory headers while the aftermarket went for more robust headers. It was only a few techs who beat the drum for mixture control as the core of the answer while others were perfectly happy to band aid symptoms. I think Ferrari just assumes mixture control but has a hard time achieving that just like they still can't make an interior that does not get sticky. There are pages of arguments on the reversion headers issue.

So if you are seeing reversion I'd be looking at proper mixture control and proper Ferrari method cam timing as well as hard part integrity like the headers. white wisps of hairs around the engine bay were a give away of failed headers under pristine Ferrari thermal wrap of the headers.

 

If the engine has ingested bits of the pre cat, then the fix is to pull the head and see what need fixing. From my experience valve overlap is there to help the exhaust valve cooling, the only cooling for the valve being the time it touches the seat and the cool air coming into the cylinder. By having a high degree of overlap you are getting a higher amount of cool air over the exhaust valve to cool it.
On modern diesels, the turbo produces far more air than is needed for combustion- the excess is used during the overlap period to decrease the exhaust temps. We find that if the turbo performance drops off, then the exhaust temp comes up and you end up having to reduce the power output to keep the temps down.

 

I have them. I'd like to tell it right here on the board so that everybody knows. Please ask what you need. I'll post it.

 

The original question was asking for the above ?? You could have fooled me