Overheating While Towing
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Overheating While Towing
i have a predator on my 6.0, the motor overheated twice pulling heavy up a steep grade in towing mode. in factory tune or factory hp tune the motor does not overheat. both times it overheated, the egt gauge was at 950 post turbo. the motor got hot enough to turn on the check gauges light and blew antifreeze out the cap. i called diablo sport, they said they were aware of the problem and they were going to have an update available in a couple of weeks for the problem. i wonder if water injection would help??
Postmaster
Joined: Dec 2003
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From: Arizona
Wow now thats hot! 
With 950F post turbo egt you could be seeing 1250-1450F at the pre-turbo side. I would suggest two things. Ease up on the throttle climbing the hills. I wouldn't want to see post egt above 750-800F personally (IMHO) since post turbo readings can be 300-500F below pre-turbo. Second i would have your turbo checked for heat damage.
Welcome to FTE Lots of good info and people around here
With 950F post turbo egt you could be seeing 1250-1450F at the pre-turbo side. I would suggest two things. Ease up on the throttle climbing the hills. I wouldn't want to see post egt above 750-800F personally (IMHO) since post turbo readings can be 300-500F below pre-turbo. Second i would have your turbo checked for heat damage.
Welcome to FTE Lots of good info and people around here
Last edited by blackhat620; Jul 2, 2004 at 01:37 AM.
Postmaster
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From: Central Texas
Originally Posted by wauseon6.0psd
i have a predator on my 6.0, the motor overheated twice pulling heavy up a steep grade in towing mode. in factory tune or factory hp tune the motor does not overheat. both times it overheated, the egt gauge was at 950 post turbo. the motor got hot enough to turn on the check gauges light and blew antifreeze out the cap. i called diablo sport, they said they were aware of the problem and they were going to have an update available in a couple of weeks for the problem. i wonder if water injection would help??
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From: 3rd Rock
Originally Posted by wauseon6.0psd
i have a predator on my 6.0, the motor overheated twice pulling heavy up a steep grade in towing mode. in factory tune or factory hp tune the motor does not overheat. both times it overheated, the egt gauge was at 950 post turbo. the motor got hot enough to turn on the check gauges light and blew antifreeze out the cap. i called diablo sport, they said they were aware of the problem and they were going to have an update available in a couple of weeks for the problem. i wonder if water injection would help??
How steep of grade were you on?
How long was the pull
Posting Guru
Joined: May 2004
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From: stoneboro, pa
what mode did u have it in??? the 40hp? is that what u mean by "towing mode"? or u talkin 'bout tow/haul??
water injection would bring that EGT down about 200 deg or more, and it will make more power. look through the methanol/water injection thread.
water injection would bring that EGT down about 200 deg or more, and it will make more power. look through the methanol/water injection thread.
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From: 3rd Rock
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Postmaster
Joined: Dec 2003
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From: Arizona
Originally Posted by blackhat620
...With 950F post turbo egt you could be seeing 1250-1450F at the pre-turbo side... I wouldn't want to see post egt above 750-800F personally (IMHO) since post turbo readings can be 300-500F below pre-turbo....
Look up a few posts
BTW it is not a constant conversion. The temperature difference between Pre & Post Turbo is not linear. Many factors (ie.. outside air temp, RPM's, boost, Load, amount of fuel) all effect the temperature change from pre to post turbo.
Last edited by blackhat620; Jul 3, 2004 at 07:26 PM.
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FTE Leadership Emeritus
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From: 3rd Rock
Originally Posted by blackhat620
Tim,
Look up a few posts
BTW it is not a constant conversion. The temperature difference between Pre & Post Turbo is not linear. Many factors (ie.. outside air temp, RPM's, boost, Load, amount of fuel) all effect the temperature change from pre to post turbo.
Look up a few posts
BTW it is not a constant conversion. The temperature difference between Pre & Post Turbo is not linear. Many factors (ie.. outside air temp, RPM's, boost, Load, amount of fuel) all effect the temperature change from pre to post turbo.
And the placement of the thermocouple...where it actually is
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Joined: May 2004
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From: San Leandro California
When I bought the predator and read the instructions it said to consider grades. I took that to mean take it easy going up hills when towing a lot of weight.13000#'s is a lot of weight.
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From: stoneboro, pa
Originally Posted by wauseon6.0psd
i had it in the 40hp mode, pulling about 13000# through the hills in PA. my post turbo egt was 950, is that too high??
Posting Guru
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From: stoneboro, pa
Originally Posted by wauseon6.0psd
950 egt was the highest, it normally reads about 700/750