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ENGINE APPLICATION MANUAL GM Powertrain
Gasoline 4.3L V6 90 Degree Revised: 08/15/2000
File: c:\data\manuales\v6-truck\am43v6#3.doc
Contact:Luis Nespolo - (248) 857-1558 Printed: 8/15/00
57
3.3.2 GMPT interface with Air Induction System
3.3.2.1 Air Requirement
Figure: 3.3.2.1-I 4.3L V6 90 Degree Engine Air Requirements
3.3.2.2 Air Flow Path
The air flow path in the vehicle at the air inlet of the air induction system shall not be
obstructed with vehicle components that will cause loss of pressure or flow disturbance.
All performance parameters specified in paragraph: 2.3.2.1 were measured with a maximum
air restriction of 1” of Hg.
As reference in table 3.3.2.1 - I, development power and torque data is shown to illustrate
the order of magnitude that may result as increasing the induction restriction.
RPM L35 L35 Units
Truck Marine
Application Application
800 23.8 24.9 gr/sec
1200 37.8 39.3 gr/sec
1600 51.8 52.7 gr/sec
2000 65.8 67.4 gr/sec
2400 81.3 82.9 gr/sec
2800 97.7 99.0 gr/sec
3200 113.7 116.3 gr/sec
3600 128.8 130.5 gr/sec
4000 143.3 142.3 gr/sec
4400 154.7 154.0 gr/sec
4800 160.9 165.1 gr/sec
5200 163.7 175.0 gr/sec
Table 3.3.2.1 - I
4.3L V6
Development Peak Power and Torque Levels
Induction Restriction *
Induction Torque Power
Restriction (Lb.-Ft) (Hp)
1” Hg. 264 200
1.2” Hg. 262 198
1.4” Hg. 260 196
1.6” Hg. 258 194
* Exhaust backpressure held at 11” Hg.