Temps

[fmj]

I read a post a while back that the "safe" temp for pre-turbo (pyro installed in the exhaust manifold) was 1250. While towing I keep the temps at 1150 or below. When I see the needle approaching that mark I start backing off the peddal. I keep reading that some of you guys push the 1300 mark. I tow some long stiff grades and the power is not a problem, but I worry that the temp will shorten engine life. Can I push it above the 1250 mark for a short duration (spike)?

 

[JohnB]

I also use 1250 as my limit. Banks uses 1300 and Mark at TST uses that number although he has said that these engines can stand quite a bit of heat. My . 02 is to be safe.

------------------
01' 2500,SB, Club Cab, 5spd,3. 54 LS, Bright White, Camel Leather. Pillar mount boost & pyro, fuel presure guage, TST PM3 adjustable--2001 Sunnybrook 27' 5ver

 

[drawson]

While towing I limited mine to 1300 deg. Racing it will barry the guage 1500+ for just seconds. On my 12 valve the EGT are never a problem until I rev it over 2600 RPMs. Even towing a back hoe up a 5% grade the corners where the problem not EGT. Up that guage I reach 1100 deg max.

It's just like a cutting torch you can hit the metal with that great heat for seconds w/o cutting it but if it dwell there too long it cuts through it.

------------------
EAT'M UP
97 2500 Club 4X4 3. 54, Forrest Green/Driftwood, LSD 5 speed, & Psychotty Air System, TST #11, 370 HP injectors, timing at 16 deg. , 16CM2 housing, AFC spring kit, TST EGT gauge & 0-60 boost gauge in A Pillar, Cat-be-gone, 4" Dynomax Bullet muffler, Crome 4" turn down, 2 Electric Fans, One inside/ One out front, AmsOil Through out, Geno's trans filter kit, AmsOil Bypass system, Lund Winter front, Leer Cab Level Shell Driftwood , 255/85R16, South Bend's Hypo Clutch*NRA/USPSA member and proud of it*

[This message has been edited by drawson (edited 04-04-2001). ]

 

[fmj]

Thanks guys for the reply. This was a peace of mind question. When pulling my car hauler up the Grapevine, which is a stiff long grade, I can keep it at 60 mph, but the ETGs head for the 1200 mark about half way up. Thats when I back off and have to work the peddle. I am able to run 50 to 55 mph while keeping the ETGs below 1150. I guess I'm conserative in my old age.