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Engine basics => Engine set up tips => Topic started by: Paul Allen on March 05, 2010, 01:15:11 AM

Title: Restrictor to true venturi conversion
Post by: Paul Allen on March 05, 2010, 01:15:11 AM

Guy's
      Does anyone have a conversion chart for true venturi sizes.
Example- 0.250" restrictor what size bore for a true venturi?
Thanks
Paul

Title: Re: Restrictor to true venturi conversion
Post by: Bob Reeves on March 05, 2010, 03:43:38 AM

Calculate the area minus the spraybar and you have it.

Title: Re: Restrictor to true venturi conversion
Post by: Bill Hummel on March 05, 2010, 09:46:55 AM

Paul, this is from a chart I've used over the years, based on a ST NVA (0.157 dia.)...hope this helps:

Venturi .126 = Restrictor .250
           .148 =               .270
           .159 =               .280
           .170 =               .290
           .181 =               .300
           .192 =               .310

   Bill

Title: Re: Restrictor to true venturi conversion
Post by: BillLee on March 05, 2010, 12:32:19 PM

Try this:

http://www.nclra.org/Programs/Venturi.php

Bill Lee

Title: Re: Restrictor to true venturi conversion
Post by: Paul Allen on March 09, 2010, 04:20:28 PM

Thanks Bill, just what I was after.
Bob, will use your suggestion also.
Thanks
Paul