Pairing aftermarket springs (length/rate) with Bilstein 5100 struts
06-27-2018, 08:31 AM
#11
Flaccid Member
Thread Starter
I'm contacting Filthy Motorsports next because Ryan has dropped off of the map. No response to recent PMs.
Initially, I was looking to get the height from preloading the springs with the Bils set at 2.1", but it's becoming clearer to me that what I want is to install the Bilsteins at 0.0" of height adjustment and add a longer spring with a slightly increased spring rate.
Initially, I was looking to get the height from preloading the springs with the Bils set at 2.1", but it's becoming clearer to me that what I want is to install the Bilsteins at 0.0" of height adjustment and add a longer spring with a slightly increased spring rate.
06-27-2018, 10:14 AM
#12
He may be on vacation/etc.
Once you get it figured out, I'd greatly appreciate you posting a follow-up. I'm in the same boat... I've got Fab Fours bumpers front and rear. Rear isn't a problem, but in the front, it would probably be better for the suspension to beef up the springs a bit.
Once you get it figured out, I'd greatly appreciate you posting a follow-up. I'm in the same boat... I've got Fab Fours bumpers front and rear. Rear isn't a problem, but in the front, it would probably be better for the suspension to beef up the springs a bit.
06-27-2018, 11:46 AM
#13
Flaccid Member
Thread Starter
OK, I called FM, but they're busy and are behind a few days on responding to emails, according to their outgoing voice message. So I reached out to Eibach, and the spring they have is E30-35-037-01-20. The spring rate is 10-20% higher than stock. The length would provide between 2.25-2.5" of lift over stock with the Bils at the lowest setting, with the added weight. While I don't mind going over 2", that remains my target because I want to keep suspension geometry and CV angles reasonable.
AutoAnything.com has those springs at $145 for the pair. They claim a 2.7" lift on the website, which jives with the lift Eibach quoted, given the extra weight on my truck.
Option noted, and I'll keep looking. Maybe I'll hear back from FM.
AutoAnything.com has those springs at $145 for the pair. They claim a 2.7" lift on the website, which jives with the lift Eibach quoted, given the extra weight on my truck.
Option noted, and I'll keep looking. Maybe I'll hear back from FM.
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RichAP (06-27-2018)
06-28-2018, 06:04 AM
#14
Flaccid Member
Thread Starter
Filthy Motorsports had been really responsive. They have a question for me, but I don't know the answer:
"Do those (struts) accept standard 2.5 ID coilover springs?"
I think the OEM spring seats would be the limitation here, Any input would be great.
"Do those (struts) accept standard 2.5 ID coilover springs?"
I think the OEM spring seats would be the limitation here, Any input would be great.
06-28-2018, 12:01 PM
#15
The Eibach springs mentioned above are your best best, IMO.
Ryan
06-28-2018, 12:15 PM
#16
OK, I called FM, but they're busy and are behind a few days on responding to emails, according to their outgoing voice message. So I reached out to Eibach, and the spring they have is E30-35-037-01-20. The spring rate is 10-20% higher than stock. The length would provide between 2.25-2.5" of lift over stock with the Bils at the lowest setting, with the added weight. While I don't mind going over 2", that remains my target because I want to keep suspension geometry and CV angles reasonable.
AutoAnything.com has those springs at $145 for the pair. They claim a 2.7" lift on the website, which jives with the lift Eibach quoted, given the extra weight on my truck.
Option noted, and I'll keep looking. Maybe I'll hear back from FM.
AutoAnything.com has those springs at $145 for the pair. They claim a 2.7" lift on the website, which jives with the lift Eibach quoted, given the extra weight on my truck.
Option noted, and I'll keep looking. Maybe I'll hear back from FM.
06-28-2018, 08:39 PM
#17
Flaccid Member
Thread Starter
I probably wouldn't notice 0.3" difference... but over another half an inch might bother me. If that's how it turns out, the next tires I get will need to be 35x12.5-18s to fill the extra gap.
I have Eibach springs in my AutoAnything shopping cart. If I don't come up with another option with closer to a 2" effective lift soon, I will probably pull the trigger.
Last edited by DeltaNu1142; 06-28-2018 at 08:52 PM.
06-28-2018, 09:14 PM
#20
2015 F150 PLATNIUM Anch
I was only thinking that with the heavier bumper that adding support would be easier than changing springs , take the thought with a grain of salt and do as you will
