Wishmaster's87IROC

iTrader: (4)

I put on a set of BMR tubeular LCA's and a set of the BMR Bolt on relocation brackets. I have the LCA's set on the bottom hole...why did my rear go up a 1/2" ....I dont like it that high. Before I put the relo's on my rear sat at 27" and now it sits at 27.5"

Before I put the relo's and LCA's my stock LCA's wre angled pointing up and now they are angle pointing down. Should I put them in the middle hole to have them sitting level?

If that will give me back the lower stance in the rear then I'll do it.

LCA's dont have to be angle down do they? atleast level?

Zerstörer

Time for some lowering springs..

BretD 88GTA

The LCA's won't affect the ride height. The only effect they could have is the fore/aft position of the rear axle – which should be almost nill.

The coil springs control ride height.

Wishmaster's87IROC

iTrader: (4)

I already have lowering springs.
Im 26 1/4 in the front and 27.5 in the rear.

transambill

iTrader: (1)

When you tightned the lower control arm bolts,was the cars rear suspension loaded with the weight of the car on it or was your rear axel hanging freely? The first time I did a rear end swap I forgot to have the cars weight on it's suspension and the car was almost a inch higher at the rear

Wishmaster's87IROC

iTrader: (4)

When I tightened the control arm bolts, I had the rear jacked up on a jack with all the wieght of the car on. SHould I have done it when the car was resting on the ground?

RB83L69

If they are poly or rod-end LCAs, then it won't matter whether the car was on the ground or not.

It is not possible for the LCAs and/or reloc brackets to change the ride height. I'm not saying your ride height didn't change, only that those parts didn't cause it to do so.

Fill your gas tank up? Put the spare back in? Check tire pressures? etc. etc. There's way way way too many variables in your measurement technique to consider it even remotely nearly reliable.

CaysE

And yes, having the LCAs level (street/strip) or angled slightly down (auto-x) is preferable unless you really need launch traction. I'd be getting new tires before dropping the LCA angle too much, though.

GTA-SPD

Here is something to try. Jack it up until the tires ALMOST leave the ground and then get under there and give each of the rear springs a good jerk in each direction to be sure that they seated. I have Eibach's in the rear of my car, and they almost alway come unseated when I jack it up.

MrDude_1

you got it backwards.

you want them slightly down for street/strip... and....... slightly down for autoX..... sure you want them level for autoX.... but you also want them level for everything else.

but you need to error with the rear side DOWN so that you dont break traction. cornering or not.

CaysE

It's really a miniscule difference on whether the LCA is straight or angled slightly down when you're driving on the street or running 1/4 mile times. In my opinion, it should be as level as possible in these situations, erroring on the side of a downward angle. There are only three bolt holes at most on any relocation bracket anyway, so it's not going to be rocket science.

In auto-x though, you need them angled down. You don't want your outside tire hopping when you cut a hard turn under acceleration.

Wishmaster's87IROC

iTrader: (4)

LOL!.....you guys are getting me all confused. Should they be level (middle hole) or angled down (lower hole) which is where I put them.

CaysE

If you drive like a maniac, angle them down. If you don't, keep them straight.

Wishmaster's87IROC

iTrader: (4)

I drive like a normal every day driver. Im kinda to scared to attempt to take a sharp turn at high speeds in fear that the rear will come out from under me.

But I do want max traction at the track.

CaysE

Keep them angled down then.

GTA-SPD

Around here that is talking on a cell phone, whilst shaving and finishing up the report on your laptop and eating a bowl of cereal. I've seen everyone of those listed, albeit not by the same guy.

Don't be, these cars actually handle pretty good. Just work your way up to it. If you try a 15MPH corner the first time at 60, you are going to screw it up. If you go through that corner a little faster each time, you'll get more and more comfortable with your car, and you'll be pounding corners in no time. I actually like to hammer through the twisties more than doing the straight line thing.

Twilightoptics

Agreed. You want them angled down a bit or level. You just don't want rear mount to be sitting higher than the front lca mount. That's bad all the way around. When you lower the car you need the relocation brackets to maintain geometery. Alot of our cars the springs sag in the back so much it's a nasty angle and needs to be fixed perferably by replacement springs like the Moog 5665 replacement springs. They are stiffer and maintain stock ride height. My springs are so weak from years of launching hard that with stock height, I'm on the bottom hole of the Spohn LCARBs and it just barely is angled down.