Rollin' Smoke

where are you guys putting the pyro probe on the newer 06 truck? pix would help alot!

also what is the best pre or post turbo for the most accurate readings?

a friend of mine is about to put his BD outlook on and wants to know where exactly is the best placement of the probe on the manifold.

thanks alot

04ctd

CUMMINS recommends after.

one guy dropped junk in his turbo doing a "pre" turbo drill last week, search for his thread.

FWIW, i would do a pre & post, just for the fun of looking at the difference.

the Pre's i have seen were just forward of the turbo, then the shavings don't fall in the turbo, stick a long skinny magnet in there, clean it out as you go and prior startup.

truckjunkie

Use the search feature on this message board and you'll have more hours of reading and instruction and placement suggestions than you'll know what to do with.

Rollin' Smoke

well it looks there is a battle of pre or post turbo from the searching i have done.

chrigu

hi
the pyro is better pre turbo!
i have change from after to pre.
on after i have 900 and pre 1200.
and pre the temperature change faster than post.

chris

Rob C

I have never really understood this whole debate. The point of having one is to monitor exhaust gas temps, and how high they get. So with that being said, why would you install it in a position that does not give you the highest readings. Some of the programmers/monitors can actually de-fuel the motor for you, but if you have it post turbo and there is upwards to a 300 degree difference, and these de-fuel at 1400, that means it 1700 at the head. For those that argue that you don't want to get crap in the turbo, take it out before you drill, it only takes an extra 15 minutes to remove and reinstall the turbo.

03 ant a hemi

Heres the situation.
For the averagre person who has a stock truck that wants to moniter EGTs for peice of mind then post turbo is the way to go.

For a person who installs a programmer that adds a light amount of power then post is also fine. Or pre turbo. the choice is yours.

For a person who heavily modifys their truck then Pre turbo is the best.
The best woul dbe to have one pre and one post for ideal situations.


I have one pre and post. I only ever see a difference of about 150Degrees.

The amount of time it takes for either pre or post turbo to respond to a change in EGTs is the same. a fraction of a second. The post turbo will retain heat longer then the pre so that is something to think about.

just for your information, most Semi trucks that do have a pyro mounted do so post turbo.

Either one is good.
You can mount your pyro post turbo and still use the Edge Juice with Attitude for example. All you have to do is figure out where your trucks max egts are in the stock settings.

Just installing a pyro on your truck, adding a programmer/injectors etc and then saying 1200 degs is a safe number is bordering on stuipidness.
Each and every truck will be different by 50 - 100 degrees possibly more. To many variables to say exactly what your temps are.

One thing you can count on is when you mount a pyro and then run the pyro stock for a few months and get a feeling for what temps your truck is runnig, then you can res assurd that you have the right toolls and the right products to enchance your vehicle.

Raspy

Exactly. The purpose of the pyro is to monitor and protect the engine. Or more specifically, to keep from melting the pistons. To do that you need the highest temps you can read. And those are closest to the exhaust ports, pre turbo. This gives you a chance to actually know what the temp is there and not have to guess by working backward and estimating what the difference might be. The question is: are you going to accurately monitor the highest and most dangerous temperature, or not?

If you don't really care about the highest temps then just put it at the end of the exhaust pipe at the back of the truck. Or just leave the probe off and guess what the temp is.

The only disadvantage of pre is that if the probe fails and falls into the exhaust stream it will take out the turbo. Very unlikely.

The only advantage to post is that it is easier to install. So what.


Wetspirit

BMH95

Actually, the BIG advantage of the post install, is to get an accurate reading of shutdown temps. The turbo holds heat longer than the manifold, so if you care about you turbo life, you'd do it post turbo. Under a long hard load, the temps won't vary that much, but at shutdown time they will. If you mod heavily or beat the snot out of it, and are worried about melting pistons, that's one thing and it's valid then. But to say there is no reason to put it post is just not right.

$oC@l CTD

So get yourself a turbo timer, set it for three minutes and call it a day...I bet that since after 3 minutes my pre turbo temps are at around 220*, that the post turbo temps aren't much if ANY higher...

Rob C

Mine can go from 6-700 down to 220 in under a minute and half and the turbo timer on my alarm is preset at 2 minutes, so I waste 30 seconds of fuel.

$oC@l CTD

I actually have mine set at 2 minutes as well...I was just making that statement for anybody that might be a little paranoid about post turbo temps...mine also gets down to about 220* in about a minute and a half and WON'T get cooler than that no matter how long I let it sit, so like yourself, why let it sit any longer and waste fuel?

PG4x4

I just drilled and tapped my manifold last nite. I used grease and just left the truck running. It pretty much eather blew the shavings out of the hole or thru the exhaust. I would clean the shavings and regrease everything I seen a fair amount of shavings. Things I learned was, make sure ur hole is straight up and down on the top, and tapping cast iron is a sob. 4 beer later and a little bit of swearing and it was done

Raspy

and tapping cast iron is a sob. 4 beer later and a little bit of swearing and it was done[/QUOTE]





What was the hard part? Seemed very straight forward and easy.

Wetspirit

Pooter

Wasnt that bad...
I did mine in 15 minutes, thats with removing the inner fender cover and drilling from underneath thru the side...
Tapping actually didnt take that long at all, keep it lubed up, 1 and a half turns, back off half a turn, and continue till done, pull it out every 4-5 turns and clean it off, and spray it down with wd40. Vaccuumed it out with the shop vac, didnt have any shavings that got in the turbo, and I stepped up the drill bits in small incriments so if anything did, it was so small it wont harm anything...