This week we decided to perform multiple back to back runs on the dyno with several of the popular 300 series SXE turbos with multiple exhaust housings. The purpose of the dyno runs and testing is to compare spool-up and overall power potential on our 1995 12valve Cummins test vehicle, and overlay dyno graphs to help customers make educated decisions on their turbo/housing selection.
1995 Dodge Ram 2500 2wd Auto w/3.55 gear ratio and 33" BFG AT's
290k miles, stock engine with original head gasket/retorqued headbolts
PDD 650 HP 47rh Automatic Transmission
PDD 5x018" sac 145* injectors with edge filters removed and mild needle work
Farrell Diesel 640 cc maxed 215 pump set to 25* timing
Hamilton 182/214 cast cam
PDD Beehive 165# valve springs, retainers, locks
PDD 7/16" .120 wall stage 1 pushrods
24v OEM Tappets
PDD Hotrod stock-style Cummins lift pump
PDD 15w-40 Conventional Oil
AFC LIVE tuned to maximum HP on each turbo, anywhere from 500 to 600 cc's typically made the best HP.
PDD Turbo Tuner for wastegate tuned for max power on each turbo, anywhere from 38 to 55 psi depending on the turbo/housing combination.
Mustang MD 1750 dual eddy w/52" rollers and 1200hp worth of eddy current brake capacity.
90*F high humidity summer monsoon weather
There will be at least two graphs posted for each turbo/housing combination to display the following tests:
1. Unloaded run 1300 RPM to 3200 RPM (meaning 3000# drum weight only similar to an overweight DynoJet)
2. Loaded run 1800 RPM to 2800 RPM (dyno eddy current set to simulate a 5500# load plus wind resistance for a Dodge Ram brick at 70 to 105 MPH)
The first video is up and posted to our homepage at Diesel Performance | Power Driven Diesel
We will upload a new test video each day so check back to our website for the earliest updates, but I will also post updates to this thread in the evenings when I get free time.
The first turbo is a 362sxe/68 turbine with a .70ar T3 wastegated housing and HX40 downpipe bolted to the stock cast T3 manifold.