Jump to content

6" or 7" silencer


Steve M

Recommended Posts

Hello all

Continuing my nightmare quest to sort an exhaust system for my car. I've settled on a raceline manifold with 2 1/4 link pipe but now I'm on the hunt for a carbon silencer

Motad can supply a silencer( 6 INCH NOT 7) in carbon in aprox 3 weeks as they are waiting on carbon

Simpson ( can supply 7 inch ) who advertise on there website ' we now supply repackabke silencers' I'm looking at 4 weeks before availability !

After speaking to Raceline this morning I was advised to definitely go for a 7 inch silencer ( they don't sell 6 inch) if I was thinking of doing track days due to noise regs

Are people using 6 inch silencers & having any trouble with noise ? Or is 7 inch the way to go ?

Link to comment
Share on other sites

Bigger is definitely better. You can achieve good results with a six inch can too, but generally it then relies on it being as long as possible, and more critically, not too large a bore perforated pipe through the centre.

 

For instance, my last Simpson's system had a 3" bore from the last collector to the tip of the tail pipe. At that bore, even 7" inch was a bit on the small size!

Link to comment
Share on other sites

I have a Simpson's 7x29" can on a 2.0 zetec- always comes in at about 93dB for ref.

Link to comment
Share on other sites

I have a Simpson's 7x29" can on a 2.0 zetec- always comes in at about 93dB for ref.

 

Same size on my old XE car, but the 3" bore and QED Q450 cams meant I struggled around the 97/98 db mark.

Link to comment
Share on other sites

My can is built by a local company measures 6x24 on zetec recorded 92-93db at Cadwell last week but has internal spinners in the inner tube

Link to comment
Share on other sites

I have a Simpson's 7x29" can on a 2.0 zetec- always comes in at about 93dB for ref.

Mine would be going on a zetec 2.0, 285 cams linked to a raceline manifold

Could you post a pic or two up of the silencer & silencer/ link pipe please, would be very grateful

Link to comment
Share on other sites

Mine would be going on a zetec 2.0, 285 cams linked to a raceline manifoldCould you post a pic or two up of the silencer & silencer/ link pipe please, would be very grateful

Best I can do at the mo, will take a closeup for you:IMG_20140709_201411293_zpsc87dbcdd.jpg

  • Like 1
Link to comment
Share on other sites

Best I can do at the mo, will take a closeup for you:IMG_20140709_201411293_zpsc87dbcdd.jpg

 

That looks really nice.

 

:yes: :yes: :yes:

Link to comment
Share on other sites

Or Techcraft Steve if you are looking at larger silencers , have a word with Rich W , I think he has a contact there , his old car had one on .  

Link to comment
Share on other sites

Some more photos of mine- actually just measured it at 7 x 31.5" with a 2.25" pipe.

IMG_20141029_180742287_zpscfraqelg.jpgIMG_20141029_180755590_zpsbq0utix1.jpgIMG_20141029_180804810_zps5doytfjo.jpg

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

Please review our Terms of Use, Guidelines and Privacy Policy. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.