ADJUSTABLE PRESSURE REGULATOR
U.S. PATENT # 7,780,564
For use with Compu-Flow Valve Bodies #203050, 203200 & 203250
6747 Whitestone Rd • Baltimore, MD 21207 • (410) 298-4343 • FAX: (410) 298-3579
www.atiracing.com
Technical Addendum
INST. # 203183-I 8/2016
Your new ATI Valve Body features an exclusive Adjustable Pressure Regulator. The baseline
pressure of this unit is 145 - 160 psi. The regulator has been factory pre-set at 165 psi. This is the
highest pressure ATI recommends for an OEM GM Powerglide case. Pressures exceeding 165 psi in
a GM case have been known to break the case at the reverse piston bore. If you have a GM case, no
adjustment is required.
ATI further recommends that when using a GM cased transmission in cool
weather (sub 60° F), that the unit be thoroughly warmed up before engaging Reverse or Brake to
prevent case breakage.
PRESSURE PSI
165
175
185
200
225
230 - 250+
HORSEPOWER
< 500
500-750
750-900
900-1500
1500-2500+
Not Recommended
Note!
1. Heavier cars generally require more pressure as horsepower amounts increase.
2. Generally, higher pressures may cause premature wear to occur on internal components and cause
parasitic horsepower losses.
TESTING WITH A PRESSURE GAUGE
Use the test port at the Servo Cover. A reading may be obtained with the transmission in first or with the brake applied (if equipped).
Bring the RPMs up until the pressure stops climbing and reads steady. This is the regulated pressure.
The ATI Powerglide Adjustable Pressure Regulator is patented.
Patent infringements will not be tolerated and are subject to legal action.
ATI Pressure Recommendations
ADJUSTMENT PROCEDURE FOR
AFTERMARKET CASES ONLY
The pressure can be increased by
loosening the lock nut with a 9/16”
box wrench and turning the adjuster
screw in (clockwise) with a 3/16”
Allen Key. The rate of change is 16
psi per turn. Tighten the lock nut
after adjusting.
NOTE! For Billet Aluminum
Valve Body (#203051), the rate
of change is 20 psi per turn!
