Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   BRZ First-Gen (2012+) -- General Topics (https://www.ft86club.com/forums/forumdisplay.php?f=23)
-   -   Scraping my forward bumper. Solutions? (https://www.ft86club.com/forums/showthread.php?t=130374)

EAGLE5 09-24-2018 01:33 AM
Buy an SUV.

JD001 09-24-2018 10:23 AM
2 Attachment(s)
Some alternative options if you really must keep the Twin:

gravitylover 09-24-2018 11:16 AM
Quote:
Originally Posted by Tcoat (Post 3135287)
If you can't get a good approach angle a lip will just increase your issues not solve them. By extending the bumper down and forward you reduce your clearance even more. Best case scenario you just rip the lip off. Worst case it hold and breaks the bumper clips creating sag.
The bottom of my bumper is worn down from scrapping but it can't be seen so I just live with it.
I've got a pretty good case of saggy bumper :(

Quote:
Originally Posted by JD001 (Post 3136721)
Some alternative options if you really must keep the Twin:
I really want to rally mine out like this when I get the car paid off. There's one running around my area that's lifted a good 2+" and I think it looks like a whole bunch of fun.

JD001 09-24-2018 11:34 AM
Quote:
Originally Posted by gravitylover (Post 3136737)
I've got a pretty good case of saggy bumper :(



I really want to rally mine out like this when I get the car paid off. There's one running around my area that's lifted a good 2+" and I think it looks like a whole bunch of fun.
Hold on.... "I really want to rally mine out.." why so bothered about scarping the bottom of the car if that is the end game?

gravitylover 09-24-2018 04:02 PM
Quote:
Originally Posted by JD001 (Post 3136744)
Hold on.... "I really want to rally mine out.." why so bothered about scarping the bottom of the car if that is the end game?
Ehh, I'm not too worried about scraping it up but I don't want to knock anything (else) loose or damage the exhaust. If I was really worried about it I wouldn't spend time playing around on dirt roads as often as I do especially after I switch back to the winter wheels and tires soon. The front bumper is probably already a lost cause if I don't pull it off soon and replace a few of the clips.

Tcoat 09-24-2018 04:38 PM
Quote:
Originally Posted by gravitylover (Post 3136737)
I've got a pretty good case of saggy bumper :(
Bet you aren't so fond of gravity now are you?

why? 09-24-2018 07:34 PM
Quote:
Originally Posted by Spuds (Post 3136249)
Any weight removed from behind the rear wheels is going to lower the front.




I actually passed on an otherwise nice house because I scraped my FRS bumper on the driveway lip. That damage still makes me sad every time I change the oil....
No, that is not how it works. Not even remotely. Any weight removed from anywhere will raise the car a bit. Remove 100 pounds and it should stop the car from scraping on anything but the worst entryways or hills.

Spuds 09-24-2018 08:38 PM
Quote:
Originally Posted by why? (Post 3136954)
No, that is not how it works. Not even remotely. Any weight removed from anywhere will raise the car a bit. Remove 100 pounds and it should stop the car from scraping on anything but the worst entryways or hills.
The moment about the rear axle has to be 0. Sum the force vectors on both sides, the remainder is supported by the front axel as an upwards force.

By decreasing the weight behind the rear axle you reduce that part of the force vector sum. Meaning the front actually has a greater force on it, since the moment around the rear axel must still be 0.

Greater force on the front, more spring compression.

Tcoat 09-24-2018 08:52 PM
Quote:
Originally Posted by Spuds (Post 3136980)
The moment about the rear axle has to be 0. Sum the force vectors on both sides, the remainder is supported by the front axel as an upwards force.

By decreasing the weight behind the rear axle you reduce that part of the force vector sum. Meaning the front actually has a greater force on it, since the moment around the rear axel must still be 0.

Greater force on the front, more spring compression.
Even if it raised the car equally I doubt that a 3.5% weight reduction spread across the whole suspension would make any real difference in ride height at all. Certainly not enough to prevent scraping unless you were just touching by a c-hair.

Spuds 09-24-2018 09:06 PM
Quote:
Originally Posted by Tcoat (Post 3136985)
Even if it raised the car equally I doubt that a 3.5% weight reduction spread across the whole suspension would make any real difference in ride height at all. Certainly not enough to prevent scraping unless you were just touching by a c-hair.
Well, I never said anything about scale. Just relativity. Of course it won't change by any noticable amount. We are talking 50lb vs a total of 2750lb.

Tcoat 09-24-2018 09:13 PM
Quote:
Originally Posted by Spuds (Post 3136990)
Well, I never said anything about scale. Just relativity. Of course it won't change by any noticable amount. We are talking 50lb vs a total of 2750lb.
I didn't imply you did say anything about scale. I was just adding to your comment.

gravitylover 09-24-2018 10:07 PM
Quote:
Originally Posted by Tcoat (Post 3136876)
Bet you aren't so fond of gravity now are you?
Smartass :)

Tcoat 09-24-2018 10:09 PM
Quote:
Originally Posted by gravitylover (Post 3137028)
Smartass :)
http://www.nunomad.com/wp-content/up...ss-300x249.jpg

JD001 09-24-2018 10:41 PM
Quote:
Originally Posted by gravitylover (Post 3136862)
Ehh, I'm not too worried about scraping it up but I don't want to knock anything (else) loose or damage the exhaust. If I was really worried about it I wouldn't spend time playing around on dirt roads as often as I do especially after I switch back to the winter wheels and tires soon. The front bumper is probably already a lost cause if I don't pull it off soon and replace a few of the clips.
Just stick on the rally springs/shocks for now and get the rest of the rally kit later.


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