Has anyone installed a pyrometer into a lnf, and if so where did you locate it?

 

I've installed them on cummins and power strokes engines before but never on an LNF as of yet.

One of the best spots I can see to put one unfortunately already has the real estate claimed by the stock wideband. Luckily a pyrometer probe being as tiny as it is should be fine to tap just slightly upstream or downstream right around the o2 without it being a big deal or effecting the accuracy of the wideband.

 

Why do you need one anyway?
I had one installed on one of the runners around 4" after the head on my previous car, i've seen others installed where all the runners meet but on the lnf they never do since its a dual scroll turbo.

 

ull need a downpipe with a second bung, then its just screw the prob in and run the wires to ur gauge. but u usually want the prob right in the manifold for the best reading. but no manifold that i know has a bung for one in it. one thing for sure, they need a really good ground. i had to go to battery negative terminal when i had one on the talon before it started working right.

 

Per my AEM egt/pyrometer, to pick the correct location to install the pyrometer, you measure the widest point of the exhaust port and measure that far from the head. mine is less than 4" from the head.

A pyrometer after the turbo is pretty useless. and you really need 4 (1 per runner).

if you dont tap into the manifold and just put a probe on the manifold, you are only measuring the heat transfer of the metal, not the actual temperature inside of the manifold.

 

Lol.... unless you're in a dyno cell really pushing the limits of an engine for testing or collecting data for a race team, installing an egt probe into each individual exhaust port runner is absolutely rediculously unnecessary. It is very common place to install a pyrometer post turbo especially when you're working with limited space or in our case have a twin scroll manifold. The difference in egt's between preturbo and postturbo locations are nominal when your talking a street application for basic monitoring purposes. The spot I mention above is perfect for this application.

 

Put it in the collector a few inches b4 it goes into the turbo. Best place to get an even reading

 

I've read many places that 4-6" from the block pre turbo is the best place for accuracy, but our manifolds are small and are extremely heavy walled. I was hoping some one had successfully installed one in the manifold and i could copy the location, but soo far it seems like the consensus is put it in the O2 housing pipe post turbo... I'm just worried about accuracy. I mean if its going to be a couple hundred degrees off then what the point?

 

as per what BlkWdoSS stated, this is the best way of placing the Pyrometer, all professional race teams place them between 3"-5" away from the exhaust port on the head and on the exhaust manifold before the collector to the turbo, the 4 EGT readings are going to be more accurate this way compared to one pyrometer at the collector..

 

Contrary to what others may think, it will not be that far off for what you will be needing it for. Yes directly in the manifold is obviously optimal but it's just not always practical. Trust me, diesel guys pushing 50+psi install them both ways (pre and post turbo) and the post turbo numbers aren't as far off as you would think. If you really want a pyrometer then post turbo is the way to go in your case in my opinion, but if you really want to try to get one in the manifold then god speed to you.

 

you think our stock cast will hold up and not crack?

 

Thats just it, thing is super thick,really compact, and i fear it may crack.... decisions decisions.

 

drill small and go big to the size you need
then tap

 

Glad you stopped in! You guys do one on a delta yet? Or even a kappa?
As far as drilling I have a friend with a machine shop, I'll just turn it over to him once I pick a spot.

 

if its the same material as the lsj exh mani
you can tap and drill it. I have not done it on the
hhr but did it on my lsj

 

i know it is not on a LNF but still

 

Thanks for the visual! I have two exhaust manifolds i'll try it and if it breaks or whatever i'll have a back up.

 

Also keep the car running so any metal pieces hopefully get blown out.

 

I really hope this is a joke

 

The joke will be on you when the metal shavings drop down and get chewed by the turbine wheel.

 

you do it with the manifold off...

Ive seen fairly large differences in pre and post turbo, even 50-75* difference can be enough to leave an engine in pieces. I dont think you will ever reach those kinds of temperatures with a k04 but it is possible.

 

Especially with the k04. There is so much backpressure due to exhaust restriction from the small turbo. I wouldn't doubt the temp difference being in the 150* range

 

I have a WR-2 on its way, and i like to be able keeps things under watch. I have a lead foot and like to do many pulls .

 

If u do install a pyro with the manifold on just load the drill bits and tap eith grease. The grease will catch the metal shavings and you are good to go.

 

Love to see you reach in there, drill and tap that thing while it's running.

On second though.... no I don't.