Has anyone installed a pyro gauge on an pete 579 with an MX13?

When I ran EGT probes on my race car they were supposed to be 3 inches from the exhaust ports. The further down the probe is the less heat it will read.

 

The probe should go after the turbo. If the probe fails it won’t take the turbo with it

 

Q. Should I install the EGT probe before or after the turbocharger? I’ve heard before is best, but I saw an EGT mounting hole in an aftermarket exhaust system, and now I’m wondering if I can safely mount it after the turbo charger?
A. The ONLY correct position for the EGT probe is before the turbo in the exhaust manifold. There are two reasons for this: response time and accuracy. If the probe is mounted far away from the manifold, the lag between when the probe will register an increase in temperature, compared to the reading if the probe was placed in the manifold, can result in misleading EGT numbers. When used in conjunction with the Juice, this is of particular concern since the module needs to be able to de-fuel as quickly as possible to reduce EGTs when needed.

The second reason is accuracy. Putting the probe after the turbo can create inaccurate readings because the exhaust gas will cool as it travels farther away from the manifold. This discrepancy can be as much as 250 degrees, which is far too big a margin of error. Also, depending on the power upgrades you have made, the turbo itself may throw off the accuracy of a post-turbo reading. If the turbo is a restriction, excess heat will build before the turbo as hot exhaust gas backs up, while post-turbo EGT will be much lower – resulting from the reduced exhaust flow which cools even faster than it would in a balanced system. This situation can be particular dangerous because excess heat will quickly build in the motor while temperature readings after the turbo will seem almost too cool.

Remember, your exhaust pipe won’t overheat, but your engine will.

 

My 379 and all the rest of them mount after turbo in the top of the down pipe. Just ad 200 degrees or so in your head to the number. It’s better than nothing if your worried about your exhaust temps. Hope this helps. I agree that the pyro is a useful tool at monitoring if you have an issue somewhere that needs to be addressed. On long hard pulls I will down shift and slow my speed if I have to maintain a higher rpm

 

that is for a egp that will be monitored by ecm, a standard pyro has been mounted in pipe past the turbo by factory for years.
Millions of trucks. Every Detroit 60 has it mounted post turbo.

 

Every pyro probe I have ever seen has been post turbo.

 

It is not as accurate, but is done as someone mentioned due to the chance the probe might get into the turbo. Rule of thumb seems to be to add 300 degrees to whatever reading you are getting.

 

You can have it both pre and post turbo, there is a reason for a pre turbo pyrometer, to prevent turbo failure.

 

Put it in the downpipe, just after turbo. 99% of trucks are setup like that.