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ill_smo_q

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Discussion starter · #1 ·
I know I mentioned it in another thread, but I want to save everyone some time, money and annoyance. I installed the setup on my 2021 Hellcat Durango, and it did nothing to actually lower the Durango. So any of you sitting on a set, waiting to install them, go sell them :). They have more coils and thinner coils (measured with Calipers), so that means right out of the box, they are 'softer' than our factory ones. I mean I guess you can do it, if you want a more compliant ride, but no real drop. I think the hellcat springs are probably different even from the SRT (someone can check part numbers). But the only ones I would consider right now, are the Eibach ones whenever they release them. Mopar's are a no go, even though the website says they work on our cars... because technically they do, but they wont be lowering your Hellcat Durango.

Just trying to help save some headache/time/money for people.
 
I know I mentioned it in another thread, but I want to save everyone some time, money and annoyance. I installed the setup on my 2021 Hellcat Durango, and it did nothing to actually lower the Durango. So any of you sitting on a set, waiting to install them, go sell them :). They have more coils and thinner coils (measured with Calipers), so that means right out of the box, they are 'softer' than our factory ones. I mean I guess you can do it, if you want a more compliant ride, but no real drop. I think the hellcat springs are probably different even from the SRT (someone can check part numbers). But the only ones I would consider right now, are the Eibach ones whenever they release them. Mopar's are a no go, even though the website says they work on our cars... because technically they do, but they wont be lowering your Hellcat Durango.

Just trying to help save some headache/time/money for people.
You should consider cutting a half of a round off of the stock springs. This would drop it .5-.75”. Or if you want it lower, go a full round and get 1-1.5”. The ride will be the same. My experience is that the Eibachs are softer than stock. They do have a nice progressive rate though. I kinda doubt that the Eibachs you are waiting for the will be any different than the othe Durango springs. I know they came out with “special edition “ Track Hawk springs, but were they really different than the regular ones? Or were they counting on TH owners to pay extra for some that have a different part number stamped on the box?
 
Discussion starter · #3 ·
Agreed, for the most part. I have to imagine the 'special edition' cost premium because there are way fewer trackhawks than they normally sell for, so they had to make a special run for them, and charged a bit more for the smaller volume.
 
Mine took awhile to settle on my SRT 392, but they definitely lowered it by about an inch when it was all said and done. With the Hellcat being even heavier I would assume they would have no issue eventually reaching the same amount of drop. Do you happen to have a picture of the stock / Mopar lowering springs side by side?
 
I was gonna mention in the other thread to see if they settle.
 
Discussion starter · #6 ·
Well anyone who wants to be disappointed, can go for it. lol Yes I have the photos on my phone, they show nothing other than a clean garage, and then a messy one after the 'drop' but they look the same. I dont like the idea that they added more coils and went with a 'softer' spring. So expect a less rigid ride if you go with the mopars. Both fronts and rears 'stock' have thicker coils with less winds.
 
Discussion starter · #7 ·
Just to update, I go ahold of the parts department, and its clear, that the hellcat Durango actually gets its OWN springs, NOT the SRT springs. The SRT springs have a different part number and are call 'high performance' while the Durango Hellcat springs with its part number come up as 'competition.' Thats likely why people saw a drop in the SRT to Mopar, but you wouldnt find a similar drop from a Hellcat to Mopar. It stays about the same, my guess is the Hellcat already sits lower than the SRT.
 
I traded my 18 DDSRT (with lowering springs, Mopar 77072488) earlier today and picked up a DDHC. I took some pictures of the gap with a ruler. I realize it is apples and oranges and it would be better to have the 2018 pictures before lowering, but it is better than nothing. By my (imprecise) measurements, it looks like stock HC is about 1/2" higher in the front and about 1/2" higher in the back. I am not sure how much of a difference settling will make. I plan to get the lowering springs installed in the next few weeks and I will try to remember to post an update.

2018 Durango SRT with Mopar Lowering Spring and 40k miles2021 Durango Hellcat with stock springs and 30 miles
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The angle on both of those pictures is not the same. Really hard to see the gap size on the HC.
Would be more accurate if you were facing the tire, like on the '18, and not looking down at it.
Yeah, well, I was in a hurry. :)

I actually didn't look at the tread. I was looking specifically at the line between the tread at the sidewall. The ruler is basically touching the wheel fender and the line in both pictures so the angle should not matter as much. e.g. just under 3" on the 2018 and just over 3.25" on the HC on the front. You could also argue that the different tread depth would make a difference also, which is why I thought the line was slightly more accurate then trying to measure to the top of the tread. The other unknown is spring sag after 4 years. Anyways, trying to getting the HC springs done this weekend and will take some more pictures.
 
I know I mentioned it in another thread, but I want to save everyone some time, money and annoyance. I installed the setup on my 2021 Hellcat Durango, and it did nothing to actually lower the Durango. So any of you sitting on a set, waiting to install them, go sell them :). They have more coils and thinner coils (measured with Calipers), so that means right out of the box, they are 'softer' than our factory ones. I mean I guess you can do it, if you want a more compliant ride, but no real drop. I think the hellcat springs are probably different even from the SRT (someone can check part numbers). But the only ones I would consider right now, are the Eibach ones whenever they release them. Mopar's are a no go, even though the website says they work on our cars... because technically they do, but they wont be lowering your Hellcat Durango.

Just trying to help save some headache/time/money for people.
nice
 
Here are some pictures on a 2021 HC with Mopar springs installed (with 5 miles or so on them) compared to the original. I know the original post here was that the springs were the same height. Based on my measurements, it seems that the Mopar springs are slightly lower and presumably will be more pronounced once they wear in / sag. Try not to look at the tread, but rather the line on the sidewall just below the tread. Front appears to be just over 1/4" lower and rear looks about an 1/8" lower. The measurement and pictures are not perfect, but at least you can see for yourself.

2021 Durango HC Stock Springs (30 miles)2021 Durango HC Mopar Springs -77072488 (5 miles)
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Is the expense worth it to you to drop only 1/4" and 1/8"? Even if they settle in you probably won't get more than 1/2" lower total I would think.
 
Is the expense worth it to you to drop only 1/4" and 1/8"? Even if they settle in you probably won't get more than 1/2" lower total I would think.
I think everyone needs to decide for themselves. I bought the springs before I got the HC because I was happy with the drop on my 2018 392. I was a bit frustrated because I didn't feel like anyone could give a straight answer on if there was a drop or not vs. stock and how much. This is thread is the closest I got. It did confirm that the springs were different between stock and Mopar (specifically, that the diameter of the coil was different), but also indicated that there was "no drop". That just didn't sound right. After considering the returning the springs I decided to just do it and report what I could so others could maybe benefit. I agree that 1/8" is not much, but its also not nothing.

From my perspective, its borderline but I also want to see how much more it drops. I think the softer/smaller diameter springs should sag more than factory so the difference may be larger over time. Right now, I would like it a lot lower in the back, but I know that they have to make to higher to account for additional weight from towing. I am pretty happy with the front -- I feel like the drop is already noticeable to me. Lastly, I wanted to stay with something that is 100% factory/warranty backed, so the choice is nothing or a small drop.
 
I think everyone needs to decide for themselves. I bought the springs before I got the HC because I was happy with the drop on my 2018 392. I was a bit frustrated because I didn't feel like anyone could give a straight answer on if there was a drop or not vs. stock and how much.
You were asking for details on a vehicle that hadn't been out nearly enough time for R&D data to come out.
With a brand new vehicle in it's first (and only) production year, I think we're better off waiting a bit for the aftermarket to figure the bugs out.
 
I think everyone needs to decide for themselves. I bought the springs before I got the HC because I was happy with the drop on my 2018 392. I was a bit frustrated because I didn't feel like anyone could give a straight answer on if there was a drop or not vs. stock and how much. This is thread is the closest I got. It did confirm that the springs were different between stock and Mopar (specifically, that the diameter of the coil was different), but also indicated that there was "no drop". That just didn't sound right. After considering the returning the springs I decided to just do it and report what I could so others could maybe benefit. I agree that 1/8" is not much, but its also not nothing.

From my perspective, its borderline but I also want to see how much more it drops. I think the softer/smaller diameter springs should sag more than factory so the difference may be larger over time. Right now, I would like it a lot lower in the back, but I know that they have to make to higher to account for additional weight from towing. I am pretty happy with the front -- I feel like the drop is already noticeable to me. Lastly, I wanted to stay with something that is 100% factory/warranty backed, so the choice is nothing or a small drop.
SolisRacing is running Jeep SRT Eibachs on the DDHC and the drop looks mint...talked to them awhile the other day about the reasoning and setup...here are a few pics ..not the trackhawk ones!!! Give them a ring.
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