Another F430 manifold quandary!!
Discussion
Yes I'm sure the stock would be well under the static 105db and on track 92db
Russell996 said:
Is a stock F430 able to meet a 92db limit? (Is that the correct figure?)
I have a complete Capristo system on my 16M for the road and an ffcorse track day muffler for track days - but even that is 102db while the Capristo is simply offensive.
I have a complete Capristo system on my 16M for the road and an ffcorse track day muffler for track days - but even that is 102db while the Capristo is simply offensive.
Edited by Russell996 on Wednesday 22 July 00:27
I'd be interested in your Mk2's, I believe Ferrari had an offer on recently for a pair of Mk2's for £1100 but I doubt its still on now!!
Lee-0r5hq said:
I have just fitted the capristo bracket.
If you don't want the car loud you could fit one of the remote valve controllers and run it closed, wouldn't help performance. You can also modify the valves to be only partially open.
I have a brand new set of capristo manifolds that Im not going to be fitting if anyones interested. Also I will be taking off a set of used OEM mk2 manifolds with under 3k miles on them.
If you don't want the car loud you could fit one of the remote valve controllers and run it closed, wouldn't help performance. You can also modify the valves to be only partially open.
I have a brand new set of capristo manifolds that Im not going to be fitting if anyones interested. Also I will be taking off a set of used OEM mk2 manifolds with under 3k miles on them.
dvb247 said:
I'd be interested in your Mk2's, I believe Ferrari had an offer on recently for a pair of Mk2's for £1100 but I doubt its still on now!!
I think some of my posts have been deleted. My account is acting up I reset my password and got the new one, logged in and its given me a temp username?!?!?!Lee-0r5hq said:
I have just fitted the capristo bracket.
If you don't want the car loud you could fit one of the remote valve controllers and run it closed, wouldn't help performance. You can also modify the valves to be only partially open.
I have a brand new set of capristo manifolds that Im not going to be fitting if anyones interested. Also I will be taking off a set of used OEM mk2 manifolds with under 3k miles on them.
If you don't want the car loud you could fit one of the remote valve controllers and run it closed, wouldn't help performance. You can also modify the valves to be only partially open.
I have a brand new set of capristo manifolds that Im not going to be fitting if anyones interested. Also I will be taking off a set of used OEM mk2 manifolds with under 3k miles on them.
My username is GT-Two
Recent race cars are quieter than road cars having to pass 105 db static and many have been further silenced for clients to use on standard 98 db track days
Simple rule of thumb is any change to standard from 360 onwards will fail 105db and/or 92db driveby & CS/Scud/Speciale may fail these even if standard
Simple rule of thumb is any change to standard from 360 onwards will fail 105db and/or 92db driveby & CS/Scud/Speciale may fail these even if standard
Edited by johnnyreggae on Wednesday 22 July 18:50
Just to throw another perspective into this debate. I replaced my mk1 manifolds last year at 30k miles. They might have been starting to blow but my problem was that a manifold bold had snapped rather than the manifold itself, causing some warping. I've been told that Ferrari modded the mounting early in the model's history. I quite happily put mk2s on, because I wanted originality and standard sound. Perhaps I've been lucky because my car has been driven?
dvb247 said:
Yes I could avoid track days but we are missing the point, my car is now louder than everything else on track, that has to be wrong? all these race cars can't be standard exhausts?
There must be a way to get stock sound and volume without the OEM manifolds? ANY IDEAS?????
Obvious question but your valves aren't open all the time are they? Default on vacuum failure is open.There must be a way to get stock sound and volume without the OEM manifolds? ANY IDEAS?????
Can't see why your car is so loud if the only change is AP headers. If valves are functioning correctly you could fit one of the remote valve controllers that allows you to choose to keep the valves shut, would be an easy pass on the static test. Running on track would be more tricky since you don't want to overheat the muffler by running continually shut but a once a lap push for the drive by test might work.
gcpeters said:
Out of interest why are you no longer fitting the capristos?
Because I have a guy who builds great systems. Capristo do not have an exclusive on these skills!He will get my capristos to have a look at and he will build me something and then I will sell the capristos. He's also building me an exhaust which will sound something like this just not as loud!
https://www.youtube.com/watch?v=ifEg_2xXNgU
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???
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???
keith jecks said:
Interesting. What do the blue boxes mean?
Explanation from FLife and FChat forum, lots more detailed discussion there.The hysteresis range (blue) in the table are the areas where the valves are in "transistion" from closed to open. As the exhaust solenoid and valves are very slow to react compared to a computer or even the engine response time, it represents the delay time they need to open. Hysteresis is very usefull here as it prevents also having the exhaust valves opening and closing when you're close to the decision points where the valves must open.
Hysteresis is a lot used in electronics as many components have this natural property.
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.
GT Two said:
Because I have a guy who builds great systems. Capristo do not have an exclusive on these skills!
He will get my capristos to have a look at and he will build me something and then I will sell the capristos. He's also building me an exhaust which will sound something like this just not as loud!
https://www.youtube.com/watch?v=ifEg_2xXNgU
excellent! care to share the contact as I could also be interested He will get my capristos to have a look at and he will build me something and then I will sell the capristos. He's also building me an exhaust which will sound something like this just not as loud!
https://www.youtube.com/watch?v=ifEg_2xXNgU
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