Join Date: Nov 2005
Thanked 36 Times in 32 Posts
Move it pre-turbo as soon as possible!!!
I run both (pre-turbo and post-turbo) pyrometers on my truck. The difference between the two is proportional to how fast the pre-turbo temp is changing. If I am really screaming up a hill with a load (and the pre-turbo temps are rising fast), I might see 1200 pre-turbo but only 800 post. If I had been going downhill before climbing that hill (and hence had a very cool post-turbo temp initially), I'll bet I would see a higher temperature differential. Since the differential is dependent on how hard the truck is running, there is no magic number which will equal 1250° pre-turbo.
1995 F350 PSD Crew Cab Dually, 271k miles
10 ISSPRO Prototype Performax™ gauges in Pillar & Overhead pods & sitting on dash, Tymar Intake, Gutted EBPV, Tymar 3x4" downpipe, Tymar 5" exhaust, Cat's hiding in the shed, Baby Swamps, Swamps tunes, Tricumulator springs and Accumulator Valve, Tru-Cool 4590 Trans Cooler, Lock-Right Locker
1998 S&S 9.5' slide-in camper
32' enclosed tag trailer with 2 drag cars (73 Vega Super-Gas & 74 Vega ET Super-Pro)
1992 GMC Typhoon, 1973 Chevy Blazer with Pontiac 400, 1973 Trans-Am 455
2000 VW Jetta TDI - Kerma tune, Der Chimera Stage II Clutch
NRA member and certified firearms instructor, GOA Life member, IDPA member