yeah, well i have an alert set at 1250 on the post, and if it even got NEAR that i would let out of it. and I have my turbo timer set at 330 and so the truck wont even shut off after i get out and wlak away untill it kits 330.

 

1250 post. . .christ dood. . .your gunna melt a valve if you ever hit that. . .back it down to 1000.

 

ahaha ok. seee I would never know that...

 

I don't even have my alarm set until 1350 and 1400 for a split second every now and then isn't uncommon (while towing).

 

is urs post or pre...im setting my back down to 1000 i think!

 

post turbo lets you know what the turbo is doing. . .pre turbo will tell you what the engine is doing.

 

alright..that makes sense...to us that dont know the differnce..haha

 

I think I'll go with the "closer to the heat source" theory. Does it matter where on the exhaust manifold? Where they "Y" together? Or nearer to a cylinder? Or just a flat convenient location?

Also, considering expansion/contraction; is it best to drill and tap while cold or hot? What will make the cleanest threads?

 

Ive got mine mounted right where #3 dumps. it is best to do it cold. that way if you do get shavings into the manifold that you cannot get out, the turbo wont be spinning too fast to cause damage.

 

Like everyone has said pre or post depends on what you want it to tell you. Pre will tell you the temps that the turbo is exposed to and what the valves are seeing, and yea you can go high for a very short period of time. When I had the TST on my truck it would peg the gauge at 1600 if I turned up the chip and got on it at all. It would peg it real fast and I never kept it there, when I pulled the turbo none of the exhaust fins were rolled or anything, so the turbo was still fine. As far as difference it depends a lot on how much boost you are pulling and your RPM. A turbo works off of temperature and pressure. The higher the boost the more energy the turbo needs, hence a bigger drop in temperture across the turbo. The post is also very slightly slower to react. Now if you get a big load and find a huge hill you can actually get the turbo to stay at high boost for more than a couple seconds, I've seen a little over a 400 degree difference, but that was 40 psi out of the stock turbo which is not at its best effieciency. Most of the time cruising down the highway it is 200 or so, but high boost and high temps it is always a bigger split.