couple axt turbo questions

[mancinator]

ive been so busy with other thigns i have never gotten around to asking

1. any special maintenance i should know about? i know nothing about turbos except they pump more air into the motor and they sound sweet. if anyone has a manual on one and wanted to soemhow send me a copy, id love tyo work soemthign out.

2. im running 10 psi, can/should i do more and if so, how do i adjust that?

3.whats a good pyrometer to use. right now i have a digitial monstrosity that runs off a 120 volt inverter and its kind of a pain since it sometimes throws error codes, and i cant adjust it and it doenst really fit in the dash anywhere.

4.ui was told to never shut the truck off if the pyrometer is reading above 350* otherwise ill overheat the turbo. fact?

i think thats all i got for now.

 

[brownbear]

ive been so busy with other thigns i have never gotten around to asking

1. any special maintenance i should know about? i know nothing about turbos except they pump more air into the motor and they sound sweet. if anyone has a manual on one and wanted to soemhow send me a copy, id love tyo work soemthign out.
ensure clamps tight, maybe inspect the compressor wheel for damage once and awhile by taking off the intake hose. also check for free play in the bearings(wobbling wheel). if the freeplay gets too much you risk the comp wheel touching the housings and putting metal in yur engine.

2. im running 10 psi, can/should i do more and if so, how do i adjust that?
10 psi is safe number for good engine life. I want to run about 14 on mine, but 10 is good. want to go a bit higher? you can shorten the rod to the wastegate to delay it a bit, but best luck of raising 4 psi is to install a boost control valve in the line between the output pressurized air and the wastegate actuator(thin line black rubber one)

3.whats a good pyrometer to use. right now i have a digitial monstrosity that runs off a 120 volt inverter and its kind of a pain since it sometimes throws error codes, and i cant adjust it and it doenst really fit in the dash anywhere.
I bought a autometer, pretty simple install, looks ok. but I like the look of the dial on an isspro better

4.ui was told to never shut the truck off if the pyrometer is reading above 350* otherwise ill overheat the turbo. fact?
300 and below I have heard is a safe number not to overheat the oil in the turbo bearings. the cooler the better.

i think thats all i got for now.

see above

 

[Entaran]

Turning the engine off above 300-350 isn't about cooking the oil in the bearings, it's about the superheated turbine housing being exposed to a complete lack of airflow and therefore cracking internally. It's just a reliability issue.

 

[cruiser_guy]

Turning the engine off above 300-350 isn't about cooking the oil in the bearings, it's about the superheated turbine housing being exposed to a complete lack of airflow and therefore cracking internally. It's just a reliability issue.

It's both! Oil WILL burn at temperatures above 300F. The sticky "ash" left by the coked oil will eventually take up bearing clearances and thereby destroy the bearing, shaft or both.
I had a buddy lose two turbo's due to oil coking.
This is the main reason why I'll always use a water cooled turbo. It'll keep the oil a little cooler, and every little bit helps.

 

[brownbear]

It's both! Oil WILL burn at temperatures above 300F. The sticky "ash" left by the coked oil will eventually take up bearing clearances and thereby destroy the bearing, shaft or both.
I had a buddy lose two turbo's due to oil coking.
This is the main reason why I'll always use a water cooled turbo. It'll keep the oil a little cooler, and every little bit helps.

I agree a water cooled turbo does keep it cooler. But the same can be said about the oil cooking as the water coolant being contaminated by heat cooking. If that can happen.... it would be by again shutting down while too warm.

 

[cruiser_guy]

I agree a water cooled turbo does keep it cooler.

Yep, no arguements from me on a sufficiently long cool down period. I often leave my truck running when refuelling or any other time when it's only a short stop.

 

[brownbear]

I think the true heat your worried about should be when you pull off the highway. Just driving around town should not be enough heat that would cause any problems. Unless we are talking about spirited city driving...Can you do that in a BJ?

 

[cruiser_guy]

I think the true heat your worried about should be when you pull off the highway.

Most of my driving is highway. Since May 31 of this year I've been from Guatemala City in Central America to Cranbrook, B.C. through the Rocky's and back to Guatemala. I'll be heading back to Canada in about 2 weeks. I think that probably qualifies for highway!!

 

[brownbear]

Most of my driving is highway. Since May 31 of this year I've been from Guatemala City in Central America to Cranbrook, B.C. through the Rocky's and back to Guatemala. I'll be heading back to Canada in about 2 weeks. I think that probably qualifies for highway!!

A true testimonal for a BJ60!!!!!