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How can I Lower My Egt's

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I'm trying to get the lower egts on my 99 dodge 24 valve nv4500. I have the banks monster ram, pusher 3.5 inch hot side inter-cooler hose, bhaf air filter, fass 95gph fuel pump, straight piped exhaust, edge ez tuning set on 2 setting. I am trying to get better fuel millage, i have never pulled anything with it. i travel at 65 to work and my egts are about 600 to 630, how can i get them lower, thanks

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  • Me78569
    Me78569

    Yea 37's on 3.55 gives you an effective gear ratio of 3.00:1 out back.  You have to be doing 80 before you have enough RPMS in OD to get the 64mm turbo spinning at any real speed.     Regear

  • AH64ID
    AH64ID

    When you don't have the mechanical advantage of gearing the motor has to work harder to keep the tires rolling. This effect, combined with the reduced rpms of tall gearing makes for higher load at low

  • AH64ID
    AH64ID

    Is your EGT issue at cruise or WOT?   If it's at cruise going to a larger turbo will make your cruise EGT issue worse. If its at WOT then a larger turbo will lower your EGTs, to a point. 

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That's right... I forgot that the Dana 70 requires a different carrier when going lower than 4.10. 

 

Have you ever wanted a locker or limited slip? Now is the time to buy it. 

I recently just met with a Diesel tech here in Henderson and he told me almost the complete opposite of what you guys have said. So idk if he’s nuts or what. He told me my EGT problem is a turbo problem. With 125HP Injectors I should be running a 369 or even a single s400. Says my 364 isn’t creating nearly the airflow I need lol

46 minutes ago, KBecker443 said:

I recently just met with a Diesel tech here in Henderson and he told me almost the complete opposite of what you guys have said. So idk if he’s nuts or what. He told me my EGT problem is a turbo problem. With 125HP Injectors I should be running a 369 or even a single s400. Says my 364 isn’t creating nearly the airflow I need lol

 

Is your EGT issue at cruise or WOT?

 

If it's at cruise going to a larger turbo will make your cruise EGT issue worse. If its at WOT then a larger turbo will lower your EGTs, to a point. 


Everything I have gathered from this thread is that it's a cruise EGT issue. Your airflow is too low, but a larger turbo will make it worse based on the rpms you cruise at. 

    • Like 2

    Yes just cruising around trucks at 750 doing 25-35 mph. I think the guy was just trying to hustle me for some money. He wanted to sell me a turbonics s400 series turbo along with intercooler, boots, and new pipes. 

    If he was not aware that your problem was cruising, and thought it was WOT he may have been making a mor accurate recommendation.

    • Like 1

    "125" hp injectors are not nearly enough for a 400 series turbo on a vp44 truck.  there is NEVER a reason to run a s400 single on a vp44 street driven truck.

     

    Please keep in mind that I ran "225 hp" injectors on a 60 mm inducer turbo and it ran GREAT, with videos and datalogs to prove it.  you have a bigger turbo and smaller injectors, your injectors are not too big, they are really too small to maximize the airflow of the turbo.  

     

    You are slinging 37" tires with 3.55 gears, thats your EGT issue.

    • Like 1
    • Thanks 1

    @Me78569 any issue pulling or daily street driving? I’m regearing the truck for sure just questioning if I should upgrade to 225s or not. Sorry I’m kinda chasing my tail here and you guys seem to have much more experience and expertise with these trucks thank I do. I’m really learning along the way. 

     

    Datalog from that 

    0-60towing7x012.PNG

     

    Datalogging a lug down test while towing

    towinglug7x012.PNG

     

     

     

    datalog from that video

     

    0-60 7x12.PNG

     

     

     

     

    No issues.  Truck ran great, towed great, didn't smoke, and got great MPG. 

     

     

    However you need to regear before doing anything.

     

     

    Edited by Me78569

    If you don’t mind me asking what else did you have done to the truck? Upgraded intercooler or anything of that sort?

    he351ve

    7 x .012's

    quadzilla

    studs / springs / push rods

    semi built trans

     

    stock other than that.

    On 4/7/2018 at 3:19 PM, KBecker443 said:

    If you don’t mind me asking what else did you have done to the truck? Upgraded intercooler or anything of that sort?

     

    Upgraded intercoolers are a huge waste on 2nd gens. The stock cooler is one thing the Diamler-Benz group got right on these trucks.

    • Like 1

    I need more there but for the 98 percentile, yes absolutely works great.

    No offense but I think your crazy to spend thousands of dollars on new gearing when u could but a new set of smaller tires for less than 1k$. And btw I m the alone that wanted to ditch my 4:10s. 

    I’m going to spend $1300 on new gearing given then fact I just spent $1500 on the new tires that I’ve put less than 100 miles on so far. 

    7 minutes ago, KBecker443 said:

    I’m going to spend $1300 on new gearing given then fact I just spent $1500 on the new tires that I’ve put less than 100 miles on so far. 

    Are you doing the work yourself?

    Yes, a good friend of mine is a ford certified mechanic and he’s done a handful of them. Parts cost less than $900 to my door. 

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