What does a Larini sound like at 4500rpm?

[AlexT]

Seriously need to know what is sounds like since I just fitted mine and it makes a very raspy/farty sound (worse when cold) at exactly that RPM area.

Some people have told me raspy/tinniness/farty sounds go away after a few thousand miles of carboning up.

I have a S2 111S btw

[enjybenjy]

Alex
If I remember, mine made this sound for about 500 miles. Now it only does it when cold, then goes away after about 2 minutes!
Give it time, drive it more and it should sort itelf

[AlexT]

Thanks for the reply! Thats good to hear. Yes, mine makes that noise when cold as well. Sounds awful. Had someone follow me last night why I demonstrated and he agreed it sounded much nicer when fully warm.

[TonyHetherington]

Yes the noise of the exhaust really does change - not only as it warms up, but also after a fair few miles as it goes through all it's heat cycles and gets a bit coked up.

You'll love it, fear not

[AlexT]

Thanks Tony!

[AlexT]

Done 650km (around 400 miles)with the Larini now. Spent a few hours taking off some poor welds that protruded into the tailpipes. Thought the other night the sound really changed for better...in fact I really loved it...was smooth, no/v.little noticeable rasp or fart around 4500RPM. Had a grin on my face for the first time whilst driving!

Great mood at work...couldnt wait to get home to drive the car. Felt like a kid waiting for XMas.

Got home. Sanded back another weld then took it out again tonight and BLOODY HELL THE GODDAM NOISE IS BACK! ARGHHHH! I feel like kicking the crap outta this thing!

Gotta install a new exhaust rubber soon; maybe that will fix it.

[kevin ritson]

That's a shame. Been driving mine home with the roof off - this and recent drastic haircut have conspired to give me hypothermia but it's worth it for the noise

[S Works]

I have a new Janspeed on mine and I luuuuurve it. 2 weeks and the ITG goes on. BAAAAAAAAAAAAAAAARRRRRRRRRRRRRRRPPPP!!

[tonyhetherington]

AlexT said:

Got home. Sanded back another weld then took it out again tonight and BLOODY HELL THE GODDAM NOISE IS BACK! ARGHHHH! I feel like kicking the crap outta this thing!

Alex, I'm a little lost; do you mean there's a mechanical rattle of something rubbing against something else, or do you mean the engine note of the larini?

I'd suspect keep moving the exhaust on and off it's mountings just puts it in different places?! Sorry to hear of your troubles!

[AlexT]

Tony, I wish I could make a sound file but I dont have the equipment to do it. I am sure that the sound is coming from the exhaust. It doesnt sound like a mechanical rattle. Range: 4500-4800RPM. I did have a rattle where the right tailpipe was touching the diffuser surround on warmup, but I fixed that.

I have mailed Larini and they have sent me a vid of a 111S revving on a hoist(?) and it sounded EXCELLENT. Really smooth. I am sure it passed through 4500rpm. No hint of the noise I describe.

It's really strange. The fact that the noise dissappeared temporarily leads me to believe something else might be at play here. I must say that once I pass through that rev range a few times repeatedly on full throttle in 2nd it *does* attenuate the noise substantially. No leaks or traces of carbon anywhere.

Mostly I will hear the noise come from the left pipe, occassionally the right. It's definitely there because I can hear it echo back from walls etc.

I have to admit I am secretly hoping that new silicone exhaust mounts will magically make the noise dissappear. The left one is totally buggered now and I have done a temporary fix. The exhaust itself doesnt move much at all when I shake it and does not touch anything it shouldnt.