Hitachi Injector / MPI Mystery somewhat solved..
12-31-2004, 02:06 PM
#11
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I dunno. I can't even guess until someone verifies the flow of the stock Hitachis.
Otherwise, using the rules of thumb for a 5 cylinder normally aspirated engine:
167hp = 21lb injectors @ 43.5PSI = 24.8lbs @ 60.9PSI (4.2bar) [Bosch 0 280 150 209]
200hp = 25lb injectors @ 43.5PSI or 29.6lb injectors @ 60.9PSI (4.2bar) [Bosch 0 280 150 762]
meaning those 29lb injectors your running should be good for 275hp@4.2bar =)
In conclusion, I hesitate to articulate for fear that I may deviate from the truest course of rectitude, In short sir, I do not know.
167hp = 21lb injectors @ 43.5PSI = 24.8lbs @ 60.9PSI (4.2bar) [Bosch 0 280 150 209]
200hp = 25lb injectors @ 43.5PSI or 29.6lb injectors @ 60.9PSI (4.2bar) [Bosch 0 280 150 762]
meaning those 29lb injectors your running should be good for 275hp@4.2bar =)
In conclusion, I hesitate to articulate for fear that I may deviate from the truest course of rectitude, In short sir, I do not know.
01-25-2005, 06:05 AM
#12
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Update from vwvortex
Stats on Hitachi injectors in a NA 20V gathered from Bentley manuals.
The Fuel Presssure Regulator runs 3.8 to 4.2 bar.
The injectors are low impedence running from 1 to 3 ohms.
The injectors flow at 5 to 6ml/sec or 300 to 360 ml/min.
To convert that flow rate to pounds you multiply by .095895.
So the flow rate would be 29 to 35 lbs/hours.
29lbs/hr*sqrt(3/3.8) = 25.76lbs/hr@3bar
35lbs/hr*sqrt(3/4.2) = 29.58lbs/hr@3bar --> tried by Regenmeister and ran rich
The Fuel Presssure Regulator runs 3.8 to 4.2 bar.
The injectors are low impedence running from 1 to 3 ohms.
The injectors flow at 5 to 6ml/sec or 300 to 360 ml/min.
To convert that flow rate to pounds you multiply by .095895.
So the flow rate would be 29 to 35 lbs/hours.
29lbs/hr*sqrt(3/3.8) = 25.76lbs/hr@3bar
35lbs/hr*sqrt(3/4.2) = 29.58lbs/hr@3bar --> tried by Regenmeister and ran rich
05-06-2009, 12:41 PM
#13
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