Thinking out loud, pyro probe placement

[pwr2tow]

Has anyone or would it be impractical to do this.

I was thinking about drilling my manifold to install a pyro probe and thought about just clamping it along the number 4,5,6 cylinder manifold with a metal clamp and then wrapping it with header wrap to help hold the heat. I know the reading wouldn't be instantanious but could or would it give accurate enough readings?

Plausable, yes or no.

Thanks,

 

[nps]

I think the reading would be low and slow. Those with 2 probes (one mounted pre turbo and one post turbo) have reported no direct correlation between the pre and post turbo temps. Depending on how you are fueling, the difference may be more or less than the typically quoted 300* difference pre to post.



In this case, you would have even less data to try to develop a conversion factor. Futher, by the time you got the probe hot through the mainfold wall, the damage inside the engine would already be done.



Why not put it into the manifold tube with a tap?

 

[Bodie]

The point of the pyro is to measure the the air temp, not the manifold temp. Probly not a good idea, never tried it though... .

 

[BigPapa]

I would agree with nps, too slow being the main thing. My pyro can swing 300-400* in a matter of seconds. I don't think this would be true with the external pyro. New ideas are good, though.



Scott

 

[pwr2tow]

Does anyone have an infared heat detector and a pyro guage? You could do some tests and see.

 

[BGlidewell]

Does anyone have an infared heat detector and a pyro guage? You could do some tests and see.

The surface temperature of the manifold may be the same as the gas inside the manifold at any particular time, but never all the time. Air (gas)temperature is going to be almost instantaneously affected by various factors and

metal resists temperature change and retains heat. This wont work for what you need to know.

 

[JRD]

Think of a blow torch hitting a piece of 1/4 thick steel plate. The blow torch could be say 1,500 degrees on one side of the plate, place the torch on the 1/4 plate and see how long it takes to heat that plate to roughly the same temp. I would guess it would take quite sometime to reach even close to the same temp as the flame on the other side of the plate. And by the time it did, like nps said, its too late and the damage has already been done.

 

[pwr2tow]

I understand what everyone is saying, I'am just trying to think outside the box.

I guess I was thinking more for towing at sustained temps just to see how high they would get. Not use every thing a given performance part would have all at once but rather at small increaements just to see where temps are at.

I was thinking of using this idea on something like a mild towing box just to see how high temperatures actually get. You know the kind of boxes that claim to lower EGT's.

What my thinking was is to use the probe to check EGT's like I said in my original post on a stock truck and then install one of these mild performance towing boxes and see where the temps are. To see if they do or do not lower EGT's. Every truck runs different and I've read where one will run lower temps and onther will run higher temps.