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Exhaust upgrade advice

jacksonrj4098

jacksonrj4098

New member
hi

i've got a few hundred quid burning a hole in my pocket and was pondering an exhaust upgrade. my goals are for a deeper sound (especially on tickover) and some nice new tips that look good wouldn't go a miss.

design911 do a max flow system for 695 - would this satisfy my criteria? what advantages/disadvantages will i encounter from an upgrade e.g. performance/cost etc.

a simple cross over pipe has been mentioned to me as a low cost option but im not 100% sure what that would entail/involve?

many thanks in advance.
 
Hi Richard

I ran crossover pipes on my C2S, but have since removed them and wouldn't advocate using them. You won't pass an MOT with them on despite what anyone tells you and if you decide to track the car, you won't pass the noise test either! Now for the really good bit - you will, without doubt, lose power and burn oil. They will also promote a flat spot at circa 3,500 to 4,000 RPM, which really stuffs the enjoyment of the car.

The basic fact is that when Porsche designed the breathing side of things, they knew what they were doing. There are several options for upgrade on the market, but I'd go for a set of 100 cell catalysts and get the car re-mapped by Colin at Ninemeister. That way you'll get more power and torque to enjoy and won't stuff things up!!!

Regards
 
The Maxflos are excellent and give what you are looking for. I have neither flatspots or use an extra oil after fitting them and they have been on for over a year.

Would agree about 9M, after you get the car braething better. If you speak to Colin he will recommend a K&N filter and better exhaust boxes because all Porsche were doing was complying with sound level legislation nothing to do with power delivery.

It has to be remembered that when your car came out of the factory it was detuned to suit a mass market, which means comprimise.
 
Oliver - I agree, it's the way I want to go. Can you recommend any specific 100 cell cats? I've got Dansk mufflers and I think Dansk do the cats too?
 
For a nice easy option,

Try RSR exhausts, stock exhausts that have been modified to sound better, no power gain but just a nicer noise. And you dont have to remap either.

Highly recomended by a lot of people see: www.993f&q for more details.

I havet heard them, but I have decided thats the way I am going after lots and lots of reading.

You can get them from Gert at Carnewal or now in the UK from: www.essentialstyling.com/993_exhausts.htm


 
The worry about the RSR's is that they are cut open, the wire wool stuff removed and maybe some baffles removed. I had them on my last car and although they sound better at tickover were not quite deep enough!
 
Doesn't Gert do a 'try before you buy' sort of thing with RSR's? So if you didn't like them you could send them back - though from the sounds of it they are almost universally recommended.... one of the 'essential' 993 mods you might say.
 
ORIGINAL: kennyboy

Doesn't Gert do a 'try before you buy' sort of thing with RSR's? So if you didn't like them you could send them back - though from the sounds of it they are almost universally recommended.... one of the 'essential' 993 mods you might say.
Click to expand...

He does, so it is a safe way to try them. I just must like something a bit more lairy as I was disappointed by them. Then again anything is better than the OEM mufflers[:D]
 
Kenny

Can't honestly make any suggestions as to make. I'm just starting to research them a bit, but there seem to be various options available. Suggestions anyone????

Regards
 
I've had my RSRs for over a year. I would highly recommend them, they are not too obtrusive when you are in the car and barely noticeable to occupants at high speed and no booming. However, they sound glorious outside the vehicle. I've had several compliments from others.

pp
 
OK so if you use a plasma cutter and open up a standard 993 box this is what you get

F891444B9DF84C4187B6A9CB51F75139.jpg
 
Chop off the pipes at 100mm long and TIG weld the cut section back on and hey presto you have an RSR. Easy hey! (If you have a fabrication shop!) I actually reinstated the bellmouth secion which reduces the pressure drop across the entry.
The box weighs probably a third of the original.
G

1EB882FF3B9B4777BDD9A226E437DB06.jpg
 
Worth speaking with Phil Millington at Milltek. In the mid 90's they did a fair amount of development work with if my memory serves me correct RUF for the 993 silencers. I think a number of designs were tried and tested with the final one producing some useful gains but without being excessively loud.
 
I eventually plumped for the Maxflow system. Very nice deep sound at low revs and tick over and the shiny tips look the business. Haven't had chance to gauge the sound at high speed/revs yet.

Do I keep hold of my old silencers/tips (for when I sell) or would they sell on Ebay, or do I bin them?

And what should I use to keep the tips nice and polished?
 
Good choice Richard, it is a great system. Now just drill out the airfilter box or buy a motorsound one to add to the sound.

I use Autosol to polish the tips on my Maxflo's
 
Cheers William
Please tell me more about the air box filter.
Do you have a pic of a DIY job?
I'm kind of DIY challenged, and should not be let loose with a black and decker under the engine cover without proper instructions and supervision!
 
Richard - I recommend keeping your old silencers.... just in case you want to go to RSR at some point like I did. I had Dansks for a while and thought they were great but eventually the resonance started to get on my nerves.

 
Don't worry you won't want to change to puny RSR's[:D] I had a set and they did improve things, not that hard, but they don't offer what the Maxflo's give at full chat.

The airbox mod is really easy. Take the airfilter cover off , turn over and you will see the holes already marked out. Some people have actually put in less holes but used a bigger drill bit.
 
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