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Author Topic: Setting Hi-speed bypass  (Read 5787 times)

Offline msundstrom

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Setting Hi-speed bypass
« on: October 19, 2015, 03:47:33 PM »
Hi Spud,
If I need to set my Hi-speed in the 120's psi but my air pressure source is maxed at 110 psi, what is my alternative source?
Thanks
Mark S
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Offline Paul New

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Re: Setting Hi-speed bypass
« Reply #1 on: October 19, 2015, 07:27:55 PM »
CO2 bottle is what I use at the track
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Offline Spud Miller

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Re: Setting Hi-speed bypass
« Reply #2 on: October 20, 2015, 09:15:47 AM »

 Yup, CO2 or nitrogen works great. If you don't have a bottle of some kind of gas around to use, shim it one shim at a time and write down the pressure increase for each until you get to your max available air pressure. Then figure how much gain you're getting per shim (it won't be perfectly linear, but close). Then project how many shims it'll take to get where you need to be. Extrapolation :) You'll be within a few pounds.

 Spud
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Offline msundstrom

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Re: Setting Hi-speed bypass
« Reply #3 on: October 21, 2015, 08:42:31 AM »
 Thanks a lot guys. 
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Offline Paul New

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Re: Setting Hi-speed bypass
« Reply #4 on: October 21, 2015, 12:20:45 PM »
Oh yes Nitrogen would be a better option I just have CO2 onboard for my shifter
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Offline masracingtd1167

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Re: Setting Hi-speed bypass
« Reply #5 on: October 21, 2015, 01:46:37 PM »
While we are on the subject what have some of you guy's picked up with a high speed ? I have not tried one yet
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Offline dusterdave173

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Re: Setting Hi-speed bypass
« Reply #6 on: October 21, 2015, 02:36:57 PM »
Good question--I have a 355 CI sbc run mostly 1/8th some 1/4    2 3/16ths  Hilborn--will a hi speed gain me some mph and et and is it worth the trouble
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