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383 is getting a new Erson custom grind 219/219 @ 0.050 cam and a Holley Projection MPFI 4150 manifold (2,500-6,000 rpm rated by Holley) and LS 103mm TB and intake elbow.

It was 101F and 40% relative humidity when tested and a heat soaked engine and engine compartment. Full a/c system rebuild with the L31 350 Vortec swap. 1997 Express van application Sanden 4261 HT6 replacement SD7H15 model compressor with the 4.25" pulley and Vortec 8" crank pulley, parallel flow condenser replacement for Peterbilt 3S010633, GMT400 electric condenser fan replacement, 2006 F150 ...

GMT400 A/C Condenser fan test on 1987 G20 Van.

1987 G20 custom A/C charge optimization in 102F and 46% relative humidity.

Sanden 4261 SD7H15 Single Evaporator Cooling.

"Dyno Hill" 3rd gear climb

1987 G20 L31 Proflow Part-Throttle 0-65 mph

Proflow 4 Highway Cruise and 3-2 kickdown

Proflow 4 0-60 data capture.

1987 G20 Driveline Warmup 2

Cold Start and Warmup E70 Ethanol Fuel in 12F sitting 3 weeks.

Sat 45 days, Will it start? 1997 Vortec small block.

1997 Chevy Express 0-60

109F and 20% RH Idle Test

Initial Cooldown 108*F.

Off-Idle and Cruise RPM Vent Temps

Idle Vent Temps

Re-Test Stock Crankshaft Pulley

Idle AC cooling, 85F and 52% humidity ambient.

3,500-5,000 RPM 2nd gear acceleration

Segment Swap

Intake tract change on MAF system

383 Cold Start

5.3L Cutlass on Startup tune.

April 16, 2022

383 Walker Quietflow

Express Dyno 2

Express Dyno 1

2011 Pathfinder 4.0L Launched