CLASS RACER FORUM - View Single Post - changing q-jet secondary rods

Stan Weiss · 06-14-2020, 08:31 PM

John,
The jet is fixed at 0.135" or 0.014313881527918496 sq inches of flow area.

A 0.057" rod has an area of 0.0025517586328783095 sq inches

A 0.066' rod has an area of 0.0034211943997592849 sq inches

► 0.014313881527918496 - 0.0025517586328783095 = 0.011762122895040186 Total Flow Area

► 0.014313881527918496 - 0.0034211943997592849 = 0.010892687128159211 Total Flow Area

The metering rod is much smaller that the jet and so a large change in metering rod area has much less effect on total flow area.

► 0.010892687128159211 / 0.011762122895040186 = 0.92608173076923073 change.

I tried not to post to much math the first time as in other forum the math scares some people.

Stan

PS - Let me add that if they could change jets and keep rod the same size like you can on the Carters. Same weather as picture on previous page.

06-14-2020, 08:31 PM	#14
Stan Weiss Senior Member Join Date: Apr 2020 Location: Phila, PA Posts: 794 Likes: 0 Liked 734 Times in 385 Posts	Re: changing q-jet secondary rods John, The jet is fixed at 0.135" or 0.014313881527918496 sq inches of flow area. A 0.057" rod has an area of 0.0025517586328783095 sq inches A 0.066' rod has an area of 0.0034211943997592849 sq inches ► 0.014313881527918496 - 0.0025517586328783095 = 0.011762122895040186 Total Flow Area ► 0.014313881527918496 - 0.0034211943997592849 = 0.010892687128159211 Total Flow Area The metering rod is much smaller that the jet and so a large change in metering rod area has much less effect on total flow area. ► 0.010892687128159211 / 0.011762122895040186 = 0.92608173076923073 change. I tried not to post to much math the first time as in other forum the math scares some people. Stan PS - Let me add that if they could change jets and keep rod the same size like you can on the Carters. Same weather as picture on previous page. Attached Thumbnails Last edited by Stan Weiss; 06-14-2020 at 08:49 PM.