Individual throttle bodies trumpets 1.4

[Ihtisham Rauf]

Might be a bit of a silly question so please bear with me here:

Instead of using my current Suzuki GSXR600 rubber trumpets which are quite short, I was wanting to upgrade to some longer metal trumpets, something like what DanST sell:

The car is on an Alpha N setup, would it need re-tuning if the trumpets have been changed?

And what effects will these longer trumpets produce? Its just quite a few people have suggested i replace my current short rubber trumpets for some 'proper trumpets' and so I wanted to get some more info before shelling out.
Thanks very much!

For reference, these are what I currently use:

 

[Jorge_EETC]

Normally longer trumpets will favor lower rpm, but that's relative to engine it self.
I would point to 350mm from the valve face, up to the trumpet outter face.

Enviado do meu MI 8 através do Tapatalk

 

[fuzzy-hair-man]

I'd hazard a guess and say yes you should get it retuned, by changing the trumpets for longer ones you are changing the pulse tuning to lower in the rev range, Alpha N tune is unable to realise this and will assume the airflow it had previously with the shorter trumpets, how big a difference it is and if it would be ok without a tune I don't know.

 

[Skinner_87]

This has some interesting info:

Blog - Emerald Adjustable Length Intake Trumpet Development

Emerald's new Adjustable intake trumpets.

www.emeraldm3d.com

 

[Ihtisham Rauf]

This has some interesting info:

Blog - Emerald Adjustable Length Intake Trumpet Development

Emerald's new Adjustable intake trumpets.

www.emeraldm3d.com

Thanks will check that link out!

 

[Ihtisham Rauf]

I'd hazard a guess and say yes you should get it retuned, by changing the trumpets for longer ones you are changing the pulse tuning to lower in the rev range, Alpha N tune is unable to realise this and will assume the airflow it had previously with the shorter trumpets, how big a difference it is and if it would be ok without a tune I don't know.

That makes sense, rather be safe than sorry. Thank you for the info.

 

[Jorge_EETC]

Thanks will check that link out!

Actually the book "Four stroke performance tuning" by Graham is way more straightforward and gives more info then that link does

Enviado do meu MI 8 através do Tapatalk