Boost'n & Roost'n

[Deezal Man]

Boost probe location

If everything goes well, within the next 3 weeks I should be able to monitor my new pyro,boost, and transmission temp gauges.



I'm sure we've discussed this in the past, but what is the verdict on where to place the boost probe? Does it matter? Why?



Secondly, with all the talk about 4" exhaust... I've yet to be totally convinced that its really necessary... or should I say worth the money vs. HP gain. Some have even spoke about a decrease in Boost when they installed a 4" system.



I'm installing DDII's and the True Torque Box on my 98. 5 24v.

I would only consider that mildly BOMB'd. Yes?. . no?. . Why would I spend the money for a 4" system??? I guess I'm just not sure what I'm gaining???

 

[EMDDIESEL]

I noticed a drop in EGT's and an increase in turbo spoolup immediatley after putting the 4" exhaust in, so its definatley worth doing. As for EGT probe location. Do a search, i am not exxagerating when i say there are well over a hundred posts on this subject.

Basically, if you are going to Tow or Bomb, put the Thermocouple PRE Turbo. If your truck will be bone stock and never tow, POST Turbo is ok. Or if you have the money, time and like drilling holes, put one both PRE and POST turbo. You will also find detailed install instructions if you search back in the threads too.



Good luck

 

[Sixspeed]

DEEZAL MAN after I installed the 4" exhaust on my truck I went from a max boost presure of 30lbs to 34lbs and when towing my trailer I dropped my EGT down from 1150 to 1000 deg max. This was the main reason I went with a 4" system. As far as any performance gains my seat of the pants tells me same as stock. But the sound of the 4" exhaust way cool !!! Pryo pre turbo. JMHO.

 

[Deezal Man]

Question Restated

Let me re-state what I was originally thinking.



I have the pyro probe location determined.



What I don't have is the Boost probe location ironed out.



Should it be drilled in the aluminum intake? Or as I understand it, you can remove a bolt and install the probe in its place? Does it matter? I thought there might have been a few minus's to mounting in that bolt location... . vs drilling into the intake.



If so, where on the intake?

 

[EMDDIESEL]

The advantage to mounting the boost fitting on the intake pipe is it will assure you that you will have no chance of gauge buzzing or pulsing caused by the port being so close to the cylinder. Also, you will not need any special fittings and it is easy to get to.



The pipe you have to drill is bolted to the intake manifold and it is where the black pipe from the intercooler in connected. An easier way to describe it is the aluminum pipe that the dipstick is bolted to. Just unbolt it (4 bolts) holding it the intake manifold and drill and tap it, then bolt it back on and your all done (Make sure to replace the gasket). I have a picture i will post on here as soon as i find the disc.

 

[EMDDIESEL]

Check under "Where to drill EGT and boost fittings" i posted pics of both locations there.