Turbo Timers/ engine cool down

[mkjtiessen]

i have a hj61 with a 12ht, has a turbo timer. is this a good thing to keep or is it garbage so far i feel as though it is shorting somewhere along the circuit can not find where.

also how long should one allow for these diesel engines to cool down after

5min
10min

1 hour 2 hours ect of city driving and hard 4 wheeling

 

[dsmud4u]

Turbo timer is a good thing...I come from the land of tur I charged subaru's and at least there the timer will prolong turbo life. It kind of depends how you drive it for city driving I'd say 2-3 minutes of cool down but if you're hauling a bit more weight on the highway I might be inclined to let it cool for at least 5 minutes.

 

[ntsqd]

Common advice on Cummins diesels is under 600°F pre-turbo EGT is OK to turn off. Might get more 12HT specific info in the diesel forum here.

I have an HKS turbo timer on my 22-RET and I hate it. Instructions are in "Janglish" and are totally worthless. When I resurrect the truck I'll be getting an EGT gauge and removing the turbo timer.

 

[GLTHFJ60]

Common advice on Cummins diesels is under 600°F pre-turbo EGT is OK to turn off. Might get more 12HT specific info in the diesel forum here.

I have an HKS turbo timer on my 22-RET and I hate it. Instructions are in "Janglish" and are totally worthless. When I resurrect the truck I'll be getting an EGT gauge and removing the turbo timer.

I've always been told that below 400* is where you want to be. Anything above that results with cooked oil in the matrix oil seals.


Ditch the turbo timer and get a pyrometer (EGT gauge). That's what you should use anyway.

 

[noboredom]

like the Suby guy I had one on a GT35R bmw. I wired mine up to the ignition, pretty straight forward and had it in the glove box. Pullling wires under the heater and radio was the biggest pain. It's a due diligence thing even if the value/proloning turbo life is debatable. For me <$100 on a >$1000 turbo made sense.

 

[esh]

I go by EGT gauge and let mine go to about 400F before shutting off, sometimes 450F.

 

[Tapage]

I´m the only one who waits it goes under 350°F ..

I have TT in my HDJ80 and I have it set no more than 30 segs ..

 

[mkjtiessen]

thanks for all the responses

matt

 

[Red Rattler]

Common advice on Cummins diesels is under 600°F pre-turbo EGT is OK to turn off. Might get more 12HT specific info in the diesel forum here.

I have an HKS turbo timer on my 22-RET and I hate it. Instructions are in "Janglish" and are totally worthless. When I resurrect the truck I'll be getting an EGT gauge and removing the turbo timer.

Hey guys I work for Cummins and it recommended that all turbo diesel engines are fitted with a turbo timer. The timers here are set either for 3min or 5min. I had a Surf and was going through turbos, like there was no tomorrow. After I fitted the turbo timer I never had another problem. If you don't want a turbo timer as such use a Redarc Timer rely, its adjustable by 6sec increments. I'm using one as a glow plug rely.

 

[GLTHFJ60]

Hey guys I work for Cummins and it recommended that all turbo diesel engines are fitted with a turbo timer. The timers here are set either for 3min or 5min. I had a Surf and was going through turbos, like there was no tomorrow. After I fitted the turbo timer I never had another problem. If you don't want a turbo timer as such use a Redarc Timer rely, its adjustable by 6sec increments. I'm using one as a glow plug rely.

I'm sure the reason why you recommend the use of a turbo timer is to make sure that a driver does not forget to let the turbo cool down before shutdown. I bet that's why you kept blowing through turbos in your surf.

If you don't want to install a turbo timer, what is a safe temp (egt) to let the motor cool down to before shutdown, Mr. Cummins?

 

[ntsqd]

Hey guys I work for Cummins and it recommended that all turbo diesel engines are fitted with a turbo timer. The timers here are set either for 3min or 5min. I had a Surf and was going through turbos, like there was no tomorrow. After I fitted the turbo timer I never had another problem. If you don't want a turbo timer as such use a Redarc Timer rely, its adjustable by 6sec increments. I'm using one as a glow plug rely.

Interesting that my Cummins 6BT, fitted to a Dodge pick-up by a collaboration between Cummins and Dodge, doesn't have anything like this.

I can see an advantage in having one in that time AT a low temperature should really be the criteria to judge by. Show me one that works and has an understandable manual because the HKS unit is completely lacking in both and in customer support.

 

[Tapage]

are the cummins turbos water cooled .?

 

[GLTHFJ60]

are the cummins turbos water cooled .?

Cummins uses Holset turbos, and they're oil cooled.

 

[ntsqd]

They're oil lubricated as are all turbos. I'm sure that the oil does some cooling, but I don't know that I'd call them oil-cooled. They do not have a water jacket if that is what is being asked.

I don't know about the IHI or what ever was used on the Toyota diesels. I know that the original turbo on my 22-RET had a water jacket, as does the replacement Garret/AiResearch turbo.

 

[andrewghamilton]

Hi

I checked the owner's manual for my 12HT today and have attached a pic of it.

Cheers

 

[Tapage]

They do not have a water jacket if that is what is being asked.

that was my question since my CT26 it's water cooled, my EGT's drop pretty fast, even down here where is usually humid and HOT !

 

[Slowerthanu]

You don't need a timer, just some patience. Just sit in the vehicle until you hit about 400f.

The turbos on Subaru's are liquid cooled, they need about 30 seconds of idle after normal driving.

 

[ntsqd]

Even w/o the water cooling my CTD is usually under 600 by the time I get the truck parked. Water cooling really helps the most after a hot shut-down. It does nothing for EGT's, but it does aid in keeping the oil in the turbo from being burnt by the high metal temperatures. Which is the hot shut-off failure mode.

 

[dsmud4u]

Speaking of IHI that's what my WRX has. By no way am I saying the two are exactly alike...just stating what I do since its the only turbo car I've owned.

 

[Mace]

Funny, my 2000 f350 does not have a timer, and i just added a tuner that had a egt sensor. After 180k miles with the same turbo..

I have no clue how hot the turbo on my 2f gets, but I've never worried about it either...