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what size injectors

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Old Apr 25, 2002 | 06:19 AM
  #1  
aziroc's Avatar
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From: avondale, az
Car: 86 IROC-Z
Engine: 406
Transmission: 700R4
what size injectors

as seen in sig im running 27 or 28 lb injectors. i want to add a procharger and get 700 hp *rather have 700 rwhp* but either way what size injectors will i need to bump up to? 30# svo's?
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Old Apr 25, 2002 | 08:45 AM
  #2  
Jim 86 IROC's Avatar
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From: SE, NY, USA
Car: 1988 Vette; 1988 IROC Z-28
Engine: 350cid; 305cid
Transmission: 700R/4; 700R/4
Axle/Gears: 2.59; 2.77
A rough rule of thumb is:
HP=flow * 8 / .5, (assumes a BSFC or 0.50 for TPI)
So, for 700PH:
flow=700 / 8 * .5
flow=44lb/hr

However, I've read that the BSFC can be as low as 0.40 for TPI, in which case 34lb/hr injectors world get the job done.

If the BSFC is 0.45, the 34lb/hr injectors at 55psi would work.
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