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FrontEngineDragsters.Org Forum
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Spud Miller's Cave
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Setting Hi-speed bypass
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Topic: Setting Hi-speed bypass (Read 5668 times)
msundstrom
Full Member
Posts: 119
Your Best Time: 7.45 @ 182 in 1/4
Your Engine: NA Injected 505 BBC on 45%
Your Track: Woodburn Dragstrip
Your Vehicle: FED
General Location: Washington Coast
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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Paul New
Hero Member
Posts: 744
Your Best Time: 6.47 @ 214 MPH SBC
Your Engine: 387" SBC
Your Track: Woodburn Dragstrip
Your Vehicle: 2005 FED
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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Spud Miller
Global Moderator
Sr. Member
Posts: 332
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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Fuel Injection Enterprises, LLC
Mechanical Injection
Magnetos
EFI Conversions
msundstrom
Full Member
Posts: 119
Your Best Time: 7.45 @ 182 in 1/4
Your Engine: NA Injected 505 BBC on 45%
Your Track: Woodburn Dragstrip
Your Vehicle: FED
General Location: Washington Coast
Re: Setting Hi-speed bypass
«
Reply #3 on:
October 21, 2015, 08:42:31 AM »
Thanks a lot guys.
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Paul New
Hero Member
Posts: 744
Your Best Time: 6.47 @ 214 MPH SBC
Your Engine: 387" SBC
Your Track: Woodburn Dragstrip
Your Vehicle: 2005 FED
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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masracingtd1167
Hero Member
Posts: 1110
bill masiello Shelton Ct.
Your Best Time: 7.40's at 181 on motor 6.94 at 192 nitrous
Your Engine: 394 chevy
Your Track: Lebanon Valley Dragway
Your Vehicle: 2003 Neil and Parks
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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dusterdave173
Hero Member
Posts: 638
Your Best Time: 5.38in 1/8th
Your Engine: 355 CI SBC
Your Track: Mooresville, NC
Your Vehicle: CenPen 200 inch FED
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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I have always had a fascination with fast cars at the expense of more normal character development
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Setting Hi-speed bypass