What Sense In Replacing Sensors?
Whenever you're building a fresh computer-controlled engine, we strongly suggest the use of new sensors and controls in the interest of safe, reliable engine operation. This is the throttle position sensor, which gives the PCM (Programmable Control Module) feedback on throttle position. Elsewhere are sensors that detect coolant temperature, exhaust-gas oxygen content, inlet air temperature, and intake manifold vacuum. All these sensors need to be fresh because they each give the PCM specific feedback on a particular engine dynamic. Without that feedback, performance suffers badly.

We learned on the dyno that we needed a new Idle Air Control (IAC), which controls idle speed by creating a controlled vacuum leak at the throttle body. When we need a faster idle, the IAC creates a larger vacuum leak, which raises rpm. This happens when we turn on air conditioning or put the 4L60E automatic transmission in gear.

RPMHorsepowerTorqueBSFC
2,000133.7351.10.631
2,500182.8384.00.476
3,000243.8426.90.425
3,500287.3431.00.419
4,000336.4441.60.429
4,500394.9460.90.421
5,000435.7457.70.442
5,500461.5440.70.459
6,000475.2411.60.491
SOURCE
Summit Racing Equipment
P.O. Box 909
Akron
OH  44309
TRANS AM RACING
Gardena
CA
310-323-5417
www.transamracing.net
MSD Ignition
El Paso
TX
9-15/-857-5200
msdignition.com
Coast High Performance
1650 W. 228th St.
Torrance
CA  90501
310-784-2977
www.coasthigh.com
Hi-Tek Engine Rebuilding
14220 S. Western Ave.Dept. CCT
Gardena
CA  90249
PCM For Less (Bryan Herter)
2319 Pine Run Rd. Dept. CCT
Linden
PA  17744
L & R Automotive Supply Co.
13731 Bora Dr. Dept. CCT
Santa Fe Springs
CA  90670
Westech Performance
9-09/-685-4767
COMP Cams