Higher EGTs with EGR Delete ?? - Ford Powerstroke Diesel Forum
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Old 05-22-2012, 03:44 AM
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Higher EGTs with EGR Delete ??

I'm doing my oil cooler and egr delete this weekend. Called several "reputable" shops in my area hoping to get someone else to do the work, but can't justify the cost thinking I'm pretty capable to do it myself... But during my mechanic shopping, I had several shops tell me they don't do the egr deletes any longer due to additional problems after it's removed.. The main reason I get is a lot of customers had a substantial increase in EGTs. I'm wondering why this is. Has anyone had this issue???
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Old 05-22-2012, 06:21 AM
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Originally Posted by Marsh68 View Post
I'm doing my oil cooler and egr delete this weekend. Called several "reputable" shops in my area hoping to get someone else to do the work, but can't justify the cost thinking I'm pretty capable to do it myself... But during my mechanic shopping, I had several shops tell me they don't do the egr deletes any longer due to additional problems after it's removed.. The main reason I get is a lot of customers had a substantial increase in EGTs. I'm wondering why this is. Has anyone had this issue???
In theory that's true because you're blocking off exhaust gas that's routed back into the intake in order to lower combustion temps. What additional problems are they talking about? Maybe they didn't have head studs and threw a hot tune on it and blew the HG?
Only problem I have since EGR block and studs is keeping tires on it. I probably will need to do the oil cooler soon though.
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Old 05-22-2012, 06:30 AM
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Not sure about higher EGT's, but I have heard with the full delete it can have a negative effect on fan clutch operation. So if the fan was not operating properly pulling air thru the intercooler, I guess that could cause higher than normal EGT's.
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Old 05-22-2012, 07:43 AM
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That's probably not why they don't install them. Of course he isn't going to say they install egr deletes over the phone. What if its someone setting him up and recording him. Just my take. Just delete the cooler and leave the valve, should be all good.

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Old 05-22-2012, 07:50 AM
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Originally Posted by a2elvis View Post
Not sure about higher EGT's, but I have heard with the full delete it can have a negative effect on fan clutch operation. So if the fan was not operating properly pulling air thru the intercooler, I guess that could cause higher than normal EGT's.

The fan issue is true depending on what strategy your truck has. And yes your egr temps will be a little bit higher with an egr delete. This is why.

The purpose of the egr is to recycle spent exhaust gasses that have no energy left to contribute to the combustion process. So these are hypothetical ratios for the purpose of example but here's what happens. You're tooling down the road at 60 mph. With the egr functioning the cylinder gets filled with 70% fresh air and 30% spent exhaust gas. The computer fuels the cylinder to burn the 70% fresh air and it makes X power. Now you delete the egr and under the same conditions your cylinder is filled 100% with fresh air and fueled to burn that extra 30% fresh air. Result is a hotter burn making more power. X+30% for lack of a better way of putting it. Result is your egt's are a little bit higher. We are only talking about maybe 100* so it isn't a big deal unless you are towing max CVW and on the edge of safe already. Then there are still alternatives to bring the egt's down. Hope that all makes sense.
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Old 05-22-2012, 07:58 AM
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They really didn't go into the "problems" other than higher EGT temps and the code throwing. I already have an SCT, so not worrying about the code. They just sounded like they had returns on most of the deletes they did. And these were Sinister's or other reputable kits. But more than 2 mentioned the EGTs rising.. I just hadn't heard anyone complain about that specific issue.. But I guess in theory, it does free up hotter exhaust gases by not going through the cooler..

Most of the shops I called, had no problem doing the delete, legally.. These shops were referrals from others I trust. Most pushed the BPD replacement cooler.. But they would do a kit they purchased or one I brought them.. All wanted the work...
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Old 05-22-2012, 08:09 AM
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Originally Posted by PGreenSVT View Post
The fan issue is true depending on what strategy your truck has. And yes your egr temps will be a little bit higher with an egr delete. This is why.

The purpose of the egr is to recycle spent exhaust gasses that have no energy left to contribute to the combustion process. So these are hypothetical ratios for the purpose of example but here's what happens. You're tooling down the road at 60 mph. With the egr functioning the cylinder gets filled with 70% fresh air and 30% spent exhaust gas. The computer fuels the cylinder to burn the 70% fresh air and it makes X power. Now you delete the egr and under the same conditions your cylinder is filled 100% with fresh air and fueled to burn that extra 30% fresh air. Result is a hotter burn making more power. X+30% for lack of a better way of putting it. Result is your egt's are a little bit higher. We are only talking about maybe 100* so it isn't a big deal unless you are towing max CVW and on the edge of safe already. Then there are still alternatives to bring the egt's down. Hope that all makes sense.
Does sound believable... But being I currently have my EGR valve programmed 90% closed by my SCT, shouldnt I already see the higher EGTs??? I run between 700 and 750 degs unloaded...
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Old 05-22-2012, 01:19 PM
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If you turn you egr off with an SCT tune your EGT's won't be any higher with an egr delete. I don't see your EGT's going any higher than 50* over your current temps. No worries. I don't know what the shops you talked to were making a big deal out of.
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Old 05-22-2012, 01:27 PM
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Well since we are on the subject already what is the pros and cons from doing an egr block plates versus the egr delete reroute kit?
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Old 05-22-2012, 01:40 PM
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My egt temp raised by about 50-100 deg. When I installed my egr delete




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