Inlet manifold runner length

[Stuart Bunning]

Thanks Bruce

But this doesn't help me.

I have a program called ENGINE ANALYSER that will tell me the runner length
for whatever application or tell me HP/Tor for different runner lengths but
my question is where exactly to I measure the runner length. valve to plenum
or valve to throttle body ????

 


At 08:38 PM 27/9/98 -0400, you wrote:
>
>-----Original Message-----
>From: Stuart Bunning <stuart at kenelec.com.au>
>To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>Date: Sunday, September 27, 1998 8:08 PM
>Subject: Inlet manifold runner length
>
>
>>I am in the process of making a custom EFI inlet manifold for a straight
>six.
>>I will be using a common plenum and a single throttle body or possible two
>>throttle bodies not sure yet.
>>Can anyone tell me the correct way of calculation the inlet runner length.
>
>At the bottom of the DIY_EFI home page is an area for calculations,
>and one of them is for runner lenghts.
>>
>>I assume inlet valve to plenum. Or is it inlet valve to throttle body this
>>calculation will add a extra few inches as the plenum is usually a few
>>inches wide. After the throttle body there will be a length of about 20
>>inches of ducting to a airbox. I assume this is not relivent.
>>
>In some testing I did was best to keep this volume .5 to .75 engine
>displacement.
>Bruce
>
>


Best Regards,

STUART BUNNING
SALES ENGINEER
KENELEC PTY LTD

23-25 REDLAND DRIVE
MITCHAM VICTORIA 3132
AUSTRALIA

PHONE:  61 3 9873 1022
FAX:    61 3 9873 0200
EMAIL:  stuart at kenelec.com.au
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