Author Topic: Pump Limit  (Read 4127 times)

Offline msundstrom

  • Full Member
  • ***
  • Posts: 119
    • View Profile
  • 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
Pump Limit
« on: January 04, 2015, 08:17:30 PM »
Hi Spud,
If I'm at a .110 pill at 30%, can I get 50% on a theoretical .060 pill and be at peace or am I about out of pump?Pump is 6.1 GPM @ 4000
Thanks
Mark S

Offline Spud Miller

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 332
    • View Profile
    • Fuel Injection Ent., LLC
Re: Pump Limit
« Reply #1 on: January 06, 2015, 03:44:37 PM »

 Hi Mark,

 If a .110 pill is working at 30%, then I'm showing a .072 theoretically on 50%. I ran that combo for several years...as long as you're running pills in increments of .002 (like Kinsler), then you'll have no problem with tuning.

 Spud



Fuel Injection Enterprises, LLC
     Mechanical Injection
     Magnetos
     EFI Conversions

Offline msundstrom

  • Full Member
  • ***
  • Posts: 119
    • View Profile
  • 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: Pump Limit
« Reply #2 on: January 06, 2015, 04:17:58 PM »
Thanks Spud. You answered my next question if I needed to narrow my fuel steps from .005 to .002 increments. I assume you sell Kinsler jets?
Thanks Again
Mark

Offline Spud Miller

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 332
    • View Profile
    • Fuel Injection Ent., LLC
Re: Pump Limit
« Reply #3 on: January 06, 2015, 06:03:42 PM »

 Yup! Sure do.

 To go from a .070 to a .075" pill is a 12.9% change (area).

 To go from a .070 to a .072 pill is a 7.8% change.

 So, .002's will be friendlier for sure in the size range you're working in.

 Spud

Fuel Injection Enterprises, LLC
     Mechanical Injection
     Magnetos
     EFI Conversions