Theoretically, the longer the air horn, the lower the rpm at which they will
"tune." The effective length that you are dealing with is the full distance
from the inlet horn to the intake valve, so the difference between a 38mm
and a 50mm is pretty minor. I'm not sure yet how much difference the length
actually makes, but I do know from experience that any air horn is better
than none.
Gordon Glasgow
Renton, WA
www.gordon-glasgow.org
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Bryan Martin
> Sent: Monday, July 07, 2003 5:18 PM
> To: datsun-roadsters@autox.team.net
> Subject: Air Horn Lengths
>
>
> Hello All,
>
> Wanted to ask for input on air horn length considerations. I'm currently
> running Mikuni 44's with my 2.0L which has a more aggressive cam and
> porting. I'm more interested in low end performance if that can be
> affected with air horn length.
>
> TWM has air horns listed for these carbs which are either 12mm, 38 mm, or
> 50 mm. I don't want to go longer than 50 mm since I'm going to install a
> cold air box which will limit the length of the air horns I can use.
>
> Any input would be appreciated.
>
> Thanks,
> Bryan
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