After Turbo Probe - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 12-04-2007, 07:33 PM Thread Starter
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After Turbo Probe

Howdy all!!! I'm new to the site and finally figured out how to post, I think.

My question is: what are the temperature differences between installing a probe pre and post turbo? does it really matter or can you have a probe installed on your down pipe right after the turbo???

thanks

2004 CC F250 Lariat <<Now rolling on smaller 37x13.50 TOYO MT's, easier to tow with.>> 4" exhaust no kitty, Autometer boost & exhaust guages. woo hoo!!!!.
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post #2 of 10 Old 12-04-2007, 07:37 PM
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Yes it does make a difference. To get the best readings you want your probe pre-turbo in the manifold. Your temps will read a couple hundred degrees cooler post turbo. I dont know exactly how much of a difference in temp is though

2000 F250 cc 4x4 4" lift BFG 315's,,dp tuner Auto Meter gauges, Hybrid 235cc injectors,TN BB turbo,water meth injection,Ragin intake,ITP boost fooler Banks intercooler,big head wastegate,power elbow,torque converter,6.0 tranny cooler,High flow intakes AIH delete air ride air bags,gibson 4" exhaust,zoodad mod, remote start, Pioneer dvd/ navigation Sirrus radio,sun coast tranny ,Bts valve body,H11 s,Engine rebuild .030 over,Fluid Dampner,203 thermostat

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post #3 of 10 Old 12-04-2007, 08:03 PM
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I think it reads about 300-500 degrees cooler if you put it in the downpipe

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post #4 of 10 Old 12-04-2007, 08:07 PM
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the nornm is to go pre turbo


welcome to the site!!!!

2004 Excursion
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post #5 of 10 Old 12-04-2007, 08:45 PM
Is it even worth it???



 
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Welcome to Powerstroke.org


There is a significant difference in the temperatures between the two locations. I believe those who have had probes in both, have stated at least 300*.

A probe located before the turbo is most accurate, however, if you must for whatever reason locate the probe post-turbo, remember that you will need to adjust the maximum levels you are willing to see on your gauge downward to compensate.

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post #6 of 10 Old 12-04-2007, 08:49 PM
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a post turbo probe will always read at least 150-200 degrees cooler.....BUT it will also respond slower and more inaccurately...so while crusing it may be200 degrees cooler...at WOT when it respnonds way slower it could be as much as 4-500 degrees off.....its a tough number to say cause it will be different depending on how its being driven...
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post #7 of 10 Old 12-04-2007, 08:50 PM
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There is a huge difference. I acully have both post and pre. My post turbo can be at 300 and my pre be at 1200.. my post turbo never gets above 550

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post #8 of 10 Old 12-04-2007, 09:19 PM Thread Starter
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Thanks for the advice guys I bought this truck back in sept. and the egt was installed on a bung on the down pipe right after the turbo. should I buy a new probe or just reuse the current one. I had a very strong feeling that was in the wrong place and needed to installed on the exhaust manifold.

2004 CC F250 Lariat <<Now rolling on smaller 37x13.50 TOYO MT's, easier to tow with.>> 4" exhaust no kitty, Autometer boost & exhaust guages. woo hoo!!!!.
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post #9 of 10 Old 12-04-2007, 09:29 PM
Is it even worth it???



 
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You can reuse the probe.. but you may need a new bung, or will need to tap the manifold. You will also need to plug the existing hole.. but that should be as simple as screwing in a pipe plug.

ABOBB
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post #10 of 10 Old 12-04-2007, 09:51 PM
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Not sure if you can use the old probe but just wanted to say welcome. I grew up in Yakima.

Moon

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