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Cheap DIY way to reduce lag

  #46  
Old 11-05-2018, 09:21 AM
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Okay, I am new to all of this but liking the concept. The lag has always bothered me and not knowing a whole bunch about these diesels I had no idea what to do to change it.
I will wait for follow up reports as to any issues found and how it affects the mpg.

Personally, the "T" fitting ideas sounds like the best option so as not to confuse the computer too much. Hopefully you guys will post some picks of the set up once you determine what works the best.

Thanks for posting this.
 
  #47  
Old 11-05-2018, 12:33 PM
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Putting together a little "kit" with some hardware I had around. Includes coiled copper tube to shed heat and an inline filter to trap soot.
 
  #48  
Old 11-05-2018, 02:35 PM
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Here is how I built mine. Used compression fittings and 1/4" copper tube wound in a coil. At the end of that I put the T fitting and the EBP sensor mounted upside down. From there it goes into a small brass filter and then into the MAP sensor. Doesn't get any warmer than everything else under the hood, warm to touch but that is it.

So, does it work? YES. I am running a 1.15 Van turbo so drive pressure may be more 1:1 than that of a .84 ar stocker. Can feel it the most at....get this....low rpm! Spool up is much faster and comes on much harder. Where is can really be felt is going up a hill in OD at a lower RPM. Makes 1-2psi more boost at 1500-1600rpm. Running a 45hp tow tune and smoke is basically zero but feels more like an 85hp tune, especially down low.
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  #49  
Old 11-05-2018, 07:35 PM
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Nicely done.
to be clear are you running a non-stock tune?
 
  #50  
Old 11-05-2018, 09:10 PM
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Nice job, I don’t think emissions would approve of it here. Lol. I have to see how this works loooooonnggg term before doing it.
 
  #51  
Old 11-05-2018, 11:10 PM
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16.81mpg on 378 miles. 96% freeway with no traffic and not driven like i stole it..
 
  #52  
Old 11-05-2018, 11:27 PM
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Timmy, is that normal for your truck, less, or more MPG's?
 
  #53  
Old 11-06-2018, 12:50 AM
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Originally Posted by Sous View Post
Timmy, is that normal for your truck, less, or more MPG's?
18.1-18.3 has been the norm. Ya, i boosted it when first installed yhe mapmod, but not so much to effect a minimum of 1.4mpg. That 18ish has been for a yr and a new found 2# boost with new MAP. Got 175 on her today being the norm. With have anutha 180 by wednesday night so will top her off and compare..i cannlive with yhe 1ish loss with the "lag" diminished but not the fed line to map. And i aint goin brokejoke route. I do dig the coiled idear but fit finish needs polishing somehow. If i find that, id go back to MapMod
 
  #54  
Old 11-06-2018, 01:31 AM
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The coiled copper tube is completely pointless as far as heat goes. This isn't a 'flow through' where lots of exhaust heat will be traveling up the tube, it's a dead end and no exhaust will be flowing. I have regular ole fuel hose on a barb fitting straight to the EBP tube, not even a hose clamp on it. I haven't put a lot of miles on it, but enough to get everything to full temp a few times. If there was much exhaust heat coming up the EBP tube that fuel hose woulda melted off.

The EBP sensor mounted upside down is a good way to assure that any soot that gets to it will accumulate in it and get packed down into it, tho the long tube should cut that down.
 
  #55  
Old 11-06-2018, 01:37 AM
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Originally Posted by Colorado350 View Post
Nice job, I donít think emissions would approve of it here. Lol. I have to see how this works loooooonnggg term before doing it.
It's not emissions approved, but not obvious if you do a clean install and very easy to reverse at emissions testing time.
 
  #56  
Old 11-06-2018, 06:05 AM
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Originally Posted by '88 E-350 View Post
The coiled copper tube is completely pointless as far as heat goes. This isn't a 'flow through' where lots of exhaust heat will be traveling up the tube, it's a dead end and no exhaust will be flowing. I have regular ole fuel hose on a barb fitting straight to the EBP tube, not even a hose clamp on it. I haven't put a lot of miles on it, but enough to get everything to full temp a few times. If there was much exhaust heat coming up the EBP tube that fuel hose woulda melted off.

The EBP sensor mounted upside down is a good way to assure that any soot that gets to it will accumulate in it and get packed down into it, tho the long tube should cut that down.
It's remnants of a drive pressure gauge setup I had, that is why it is coiled copper. Actually was thinking moisture will be a bigger culprit of it being mounted upside down more than anything.
 
  #57  
Old 11-06-2018, 07:58 AM
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Originally Posted by Silverhks View Post
Nicely done.
to be clear are you running a non-stock tune?
Yes, just a basic 45hp SCT "tow" tune. Making 26psi boost, not throwing any codes. Peak boost is actually up 1psi at WOT. Not sure if that is due to cooler ambient temperature or this mod.
 
  #58  
Old 11-06-2018, 08:27 AM
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Originally Posted by brokestroke View Post
Peak boost is actually up 1psi at WOT. Not sure if that is due to cooler ambient temperature or this mod.
A simple test would be to drive to your destination with the mod intact, then drive back home with the mod removed. Compare the difference in how the truck drives.

I was never considering this for my truck and the 1.5 MPG drop that Timmy saw, well I think that speaks for itself.
 
  #59  
Old 11-06-2018, 09:11 AM
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I wouldnt be surprised if my mileage drops a bit too. Might just be a matter or changing my driving style as it does get more fuel with less throttle input.
 
  #60  
Old 11-06-2018, 09:12 AM
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I wonder if the mpg drop is due to putting your foot in it more because you like the new found power at takeoff?
 

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