Changing bolts to improve chassis performance.
#11
I will use the ap1 bolts, forever, with confidence.
The bolt diameter is the same. There is no difference except the bolt head.
The change could have been for superceeding, or streamlining logistics for the bolt itself (its nice to use ONE socket for all subframe bolts). I would change them for THAT reason. There is no functional difference.
Wound you like to talk technical about subframe collars?
The bolt diameter is the same. There is no difference except the bolt head.
The change could have been for superceeding, or streamlining logistics for the bolt itself (its nice to use ONE socket for all subframe bolts). I would change them for THAT reason. There is no functional difference.
Wound you like to talk technical about subframe collars?
I would. You don't feel like they do much? I use them to keep my subframe on center.
Last edited by B serious; 10-23-2024 at 05:27 PM.
The following users liked this post:
Save the Manual Wagons! (10-23-2024)
#12
I never had my subframe shift even hopping down the bumps at Sebring.
Now as far as a bigger head, since the flange is what clamps the subframe to the chassis, having a bigger flange means the clamping loads are distributed over a larger area. Does it matter when you have 6 huge bolts? Probably not.
Now as far as a bigger head, since the flange is what clamps the subframe to the chassis, having a bigger flange means the clamping loads are distributed over a larger area. Does it matter when you have 6 huge bolts? Probably not.
Last edited by Slowcrash_101; Yesterday at 03:12 AM.
#13
As far as solving a problem, they solve nothing. To say they “improve” something would suggest that the subframe is moving back and forth.
If that were the case, there would be a massive thud when the subframe moves, and it would be blatantly obvious. 10x more obvious than, say, a loose a-arm bolt.
Anyone who has a shifting subframe (which in my estimation is no one) simply needs to learn how the properly tighten the bolts.
Subframe collars will also not fit in all cars. There a small variations that prevent that in some cars.
There have been about 3 cars so far that they would not fit, due to subframe/mainframe variation. They become a long fight, and a waste of time. I no longer install them.
The following users liked this post:
windhund116 (Yesterday)
#14
When centering the subframe, there's alignment holes, stick a big screwdriver in the alignment hole, and nudge the subframe if it's not lining up. You can also shift the subframe forward to get a little more caster, if you need more than the 8 degrees the compliance bushing gives you.
#15
I thought subframe collars were snake oil until I installed a set for my friend.
They somehow make the chassis feel tighter and I was impressed enough to buy a set for myself.
I've since installed them on several peoples cars and everyone has been happy with them.
They somehow make the chassis feel tighter and I was impressed enough to buy a set for myself.
I've since installed them on several peoples cars and everyone has been happy with them.
#16
The problem with installing these is that everyone (myself included) wants to feel something from them. Someone who has a mechanic friend and daily drives their S2000 should do a blind test.
1. Drive to the mechanic in the morning, drop off the S2000, use their second car to drive to work.
2. After work, pick up the S2000 and drive it home. Leave second car at mechanic overnight.
3. Repeat steps 1 + 2 for a week. The mechanic will randomly pick one of those days to install the collars and set the alignment the same as it was before.
4. At the end of the week, the owner of the car has to guess when they were installed.
1. Drive to the mechanic in the morning, drop off the S2000, use their second car to drive to work.
2. After work, pick up the S2000 and drive it home. Leave second car at mechanic overnight.
3. Repeat steps 1 + 2 for a week. The mechanic will randomly pick one of those days to install the collars and set the alignment the same as it was before.
4. At the end of the week, the owner of the car has to guess when they were installed.
#17
It is true there likely is some placebo affect going on but I 100% thought they weren't going to make a difference.
I'd also wager that the stiffer your suspension is the more you'll feel a difference.
I don't think they will make the car any faster around a track but they do make the car a bit nicer to drive
I'd also wager that the stiffer your suspension is the more you'll feel a difference.
I don't think they will make the car any faster around a track but they do make the car a bit nicer to drive
Thread
Thread Starter
Forum
Replies
Last Post