jimjawz

I was wondering if it is better to place my pyro probe pre or post turbo.Or an I being fanatical? thank you for any response.

KatDiesel

Pre turbo.

If you place it post turbo your just guessing at what the actual temperture is because it can vary upto 600 degrees.

jimjawz

Darn, I already drilled and tapped my waste gate housing. I always read and heard to place probe a few inches post turbo. well were my probe is located at this time,my max egt is 1000 degrees. is it worth redrilling my exhaust manifold and plugging the other hole? ???

Lary Ellis (Top)

If it were me I would buy a second probe and hook them both up to a toggle switch. That way the same gauge could read both pre and post turbo

erics76

If you're seeing 1000 degrees post turbo, then the actual temp is probably around 1300-1500 degrees. That's real hot. most people agree that around 1300 is limit, and that temp shouldn't be kept for long periods. Since you're running pretty hot, I'd plug it and go pre turbo. That way you will get a more accurate and responsive reading.

jimjawz

:'(I feel cheated. I hope I have 'nt hurt any thing by ruuning hot. my 1000 degrees is obtained at 2700 rpm,32 psi of boost and unloaded in fifth wot. all other temps are less than 800. I should have done more reserch before I got happy with my makita and tap and dye.I though I was cool and a bag of chips.

GreyBoy

I would do what Lary Ellis (Top) said, since you already have it post turbo. I dont think a new probe would cost too much, plus youd have more accurate readind of what the turbos doing. Just my 2 cents

dieselman24

Im not sure if I believe all that pyro nonsense I have had mine absolutley pegged for 45 seconds 1500 and it took it a good 30 seconds(12valve) to come back down and mine is in the turbo housing and that was pulling about 12000# on a trailer so you tell me how HOT that got and it still runs fine just look at the signature on the 5 speed truck... So you put it where you want to but I sure wouldnt be to concerned about it at all cause they will take some heat...

Rattletrap1

well...say what you will...but ALL metal looses strength at elevated temps. At 1500 steel is red hot and suffers a significant loss of strength. This is tough on anything but the super alloys.

If you think about it...this is why you heat steel to red to form it more easily.

erics76

Everybody has the right to do what they want to with their truck. There's no way I'd hold mine at 1500 degrees for over a minute. The reason I put in a EGT gauge in is so I wouldn't be doing that. I agree with rattletrap, it's not good at all for metal to get that hot. I've seen steel at 1500 degrees, and I don't want to see that on my engine.

Diesel fitter

If reading EGT's is so important pre turbo why do the big rigs have it mounted post turbo? Look at the distance only about 4 inches it looks like to me.

jimjawz

what I did was read the instructions on the mounting kit of the probe,asked banks,and installed a banks power pack on a 95 powertoke and they all are post turbo....So,again I m so confused on what temps I should watch out for and at what location of the probe is this regarding. Pre or post or is it not really matter ??? ??? Any response is great jim

AlpineRAM

Pre or post- good question. With a stock ISB Cummins declared that the critical long term piston temperature is reached when the EGT post turbo goes above 950F. Since this is for stock everything it makes sense. Post turbo makes sense in series application, because if the fool with the hammer hits something there the probe won't go through the turbo.
For any mods on the engine, like boxes, injectors, turbos etc you are on your own now, so pre-turbo makes sense because it's linked more directly to the piston temps.
Banks is making series production of their kits so they can afford to go post turbo.

AlpineRAM

jimjawz

Thank you AR