Exhaust Depot said:
I was going to tap it on the manifold but you have to remove the turbo in order to do that. I did not wan't any chips damaging my wheel.
The location I tapped it in is actually not that bad of a spot. If you take a look at the stock manifold, you will see how wierd it is.
It looks high because it's coming out of the turbo.... you NEED to put that in the manifold(for the Newbies: turbos don't have "headers"). You need to know the temps coming out of the head, so you know what the temp is on your valves and such. You will also want to tap runner 1, as it will be the first to see changes/temps. Where did you hear runner 4 ?
You do not have to remove the maifold to install a thermalcouple(egt probe). You just need to do it a certin way.
Get a set of drill bits lined up(literaly) ranging from 1/8" up the the size need for your bung.
Start with a COLD engine.... Start the car and let it
IDLE.
Drill a 1/8" hole, then use a 3/16" to make the hole bigger, continue in this manner to SLOWLY get the hole to where you need it. If your not welding a bung on, you can tap it, but go SLOW and back break the chips offten to minimize the size of the chips. (keep in mind that exhaust gasses will be excaping between the Taps' grooves... so where gloves).
You'll want to do this relativly quick as possible, as the manifold gets HOT rather quick.
As long as the car is Idleing, and you us small steps to get the hole larger, you'll be fine, as will your turbo. DSM guys have been doing this for years.