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post #1 of 19 Old 10-23-2012, 11:03 AM Thread Starter
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360 exhaust valve

I bought this TUBI NGT from ebay last week. I did not know it too much before I purchased it. After doing some research, I realized this exhaust may make my neighbors hate me due to its loudness. Therefore I am thinking to put muffler vavles on it so I can turn it off when I appraoch home. Has anyone ever done this before? Where can I purchase factory style exhaust valves?

Thanks.

Last edited by EliseRR; 10-23-2012 at 11:11 AM.
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post #2 of 19 Old 10-23-2012, 03:31 PM
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Ferrari Parts : 183877 : 183877 VALVOLA DI BY-PASS X CODA DX

Ferrari Parts : 170029 : 170029 BY-PASS-VALVE

Probably easier to buy a used 360 exhaust and adapt or use your old ones.

Taz
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post #3 of 19 Old 10-23-2012, 03:39 PM Thread Starter
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Thanks Terry. I am thinking to use my old ones. From pictures I have seen, these valves are welded on. Is that right?
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post #4 of 19 Old 10-23-2012, 03:47 PM
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Hung- On the 360, that is what it looks like. If you can swap out the entire tailpipe, it would probably be easier. On the Maranellos, the tailpipes with valves are bolted to a flange and very easy to change.

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post #5 of 19 Old 10-23-2012, 11:07 PM
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Affirmative Hung, you'll have to weld them. Capristo sells also improved mechanical exhaust valves which are available in different diameters. Have a look on their website.
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post #6 of 19 Old 10-23-2012, 11:34 PM Thread Starter
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I found Apexi makes flange type exhaust control valve:
Exhaust Control Valve - Exhaust Components - Exhaust APEX Integration. From what I researched, I think it can be bolted on between header and cat. The flange there seems to be 2.5". Now need to figure out if there is enough clearance for valve. Hopefully this will fit so I can fit NGT on my car.
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post #7 of 19 Old 10-24-2012, 09:20 AM
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Hung- I would be careful putting exhaust bypass valves that close to the engine. Ferrari did it on the F355 and it can cause some mixture problems. That is why they moved them aft of the muffler on the 360 and F430.

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post #8 of 19 Old 10-24-2012, 10:25 AM Thread Starter
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Terry, understand your concern and thanks for the advice. I am still debating myself to keep Tubi NGT or not. Maybe I should just get a Capristo twin sound to avoid all troubles.
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post #9 of 19 Old 10-28-2012, 09:17 AM
 
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Hi Taz as I understand you could install a tubi muffler and still use the oem outlet pipe with it? or you still need to do something
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post #10 of 19 Old 10-28-2012, 10:40 PM Thread Starter
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No NGT design is different. Muffler only has one exit hole on each side instead of 2.
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post #11 of 19 Old 10-29-2012, 10:13 AM
 
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Quote:
Originally Posted by EliseRR View Post
No NGT design is different. Muffler only has one exit hole on each side instead of 2.
Actually Original racing purpose NGT's have one tail pipe but the road versions have twin pipes on each side.
And the OEM tail pipe sizes are different than NGT pipes.
The valves in 360s & 430s are reliable in contrary to 355s. You can take off them from your old system and re-weld OEM valves and use them with your NGT. But if the diameter of the pipes are different (and yes they re different) you will need small easy flanges.
But on the other hand if you want more sophisticated and reliable valves you can use Capristo. Also they have a few different diameter range with a remote control system option as far as I know.
On the other hand Tubi NGT is the best (and the most ear bleeding) chrome choice (it is road legal) for 360s. It is definitely the last resort before the Titanium products.
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post #12 of 19 Old 10-29-2012, 10:40 AM
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Quote:
Originally Posted by Hakankuy View Post
Actually Original racing purpose NGT's have one tail pipe but the road versions have twin pipes on each side.
And the OEM tail pipe sizes are different than NGT pipes.
The valves in 360s & 430s are reliable in contrary to 355s. You can take off them from your old system and re-weld OEM valves and use them with your NGT.


It would be difficult to be more wrong. The NGT has a single pipe for each side that divides into two tips for cosmetics only. Blocking one tip, even if possible as described would achieve nothing.


If people who really know nothing would quit providing my clients with bad advice my life would be much easier.
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post #13 of 19 Old 10-29-2012, 11:53 AM
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Brian- I guess with no long and short path through the muffler, valves would be kind of superfluous. All they would do is cram all the exhaust flow through one of the tailpipes, which will not do squat.

Taz
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post #14 of 19 Old 10-29-2012, 06:28 PM
 
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Great info, how about if it is a regular tubi will the OEM twin pipes with valves work?
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post #15 of 19 Old 10-29-2012, 08:32 PM
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Some manufacturers use the same exhaust system with and without bypass valves. The Novitec Supersport system I had on my car for a while (very loud) had, per muffler can, one straight through pipe and one that traveled a bit further. Without valves, the outboard pipe had nothing flowing through it and all the flow went through the staight pipe. Hence loud. You could actually look straight through the muffler from the tailpipe. Adding valves to force the flow through the long path when the valves were closed would have been relatively easy.

I assumed the NGT was similar, but obviously not. Should have looked.

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post #16 of 19 Old 10-31-2012, 03:14 PM
 
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Quote:
Originally Posted by Brian View Post
It would be difficult to be more wrong. The NGT has a single pipe for each side that divides into two tips for cosmetics only. Blocking one tip, even if possible as described would achieve nothing.


If people who really know nothing would quit providing my clients with bad advice my life would be much easier.
Although the way of criticism is quiet irritating you are rite. It is my fault that I mixed the CS and NGT mufflers. In terms of NGT mufflers exhaust by-pass valves are useless.
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post #17 of 19 Old 11-02-2012, 09:31 PM
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Quote:
Originally Posted by Hakankuy View Post
Although the way of criticism is quiet irritating you are rite. It is my fault that I mixed the CS and NGT mufflers. In terms of NGT mufflers exhaust by-pass valves are useless.
I dont see criticism in Brian's response. Its quite factual and really spot on.

Hung, one other option is placing a 430 exhaust on the 360. It requires some modification; however, it offers a performance improvement as well as a better sound. Plus it uses a vacuum based by-pass that can be disconnected for "fun". There is a link to a sound clip on this forum: Ferrari 360 Modena Tunnel - YouTube

I have a friend in SoCal that did this - sounds pretty cool!
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post #18 of 19 Old 11-02-2012, 10:22 PM Thread Starter
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I have decided to put NGT on in a couple of weeks. If it's too loud, I will probably just install valves on. Found a photo of Fuchs exhaust for 360 and it has the same design as NGT, one exit pipe on each side of muffler. The valve actually resides on one of the tips. What I am going to do is once I got exhaust on. I will block one tip on each side to test if it reduces noise level. If it works, valves will also work for sure.
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post #19 of 19 Old 11-04-2012, 09:15 AM
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did you get a chance to go and hear mine?
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