Jump to content

Snorkel Width


Recommended Posts

How wide is wide enough ? Snorkels seem to come in 2.5 , 3.0, 3.5 and Nigel massive.

I have a 2.5" Southdowns snorkel but now I've up'd from a 3.5 to a 4.2 is that enough ? The manifold aperture is 70mm but throttle response seems slower with the snorkel connected. Is it going to be worth upping the diameter from the air filter to top to 3" ?

Link to comment
Share on other sites

When Sir Les of Hensonshire made mine, I decided not to go any smaller than the plenum inlet....

With bends / obstructions you ought to consider a slighty larger inner dimension. I decided similar to the plenum was good for me as I rarely run for any length of time at hi revs /WOT when most air will be needed...

If you feel you engine is restricted, got up to 3 inches and see if you can feel the difference.. (oooerr Missus..!!)


Link to comment
Share on other sites

Yes 3" will improve things.

When I did mine speaking to JED for something as long as a snaorkel for bigger bore engines

he didn'tr recomend them, if you "Have to have one" circa 80-95mm :blink:

Hence mine :P

As and when the 5.2 gets in there, I will prob run with snorkel disconnected

and them just pop a pipe on when required


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.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  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

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy