I've installed full GSR suspension with brakes and a GSR engine in my EG. Went all out with the tranny and had a Kaaz 1.5 way installed. I also did the energy suspension master kit. Now the car handles like a can of poo. Well I think it did before as well but it's unpredictable now.

The trouble I'm running into is in corners. Under decel or steady state it seems to go around acceptably with some mild understeer. A little too much body lean for my taste. Soon as I start getting on the gas I can feel the diff starting to lock up. The tires will start squeeling and it will understeer severely. Adding more throttle will make it bite quite agressively and I will even get some mild oversteer.

I've got the swaybars but the endlinks are broken so I'll install them soon to combat the sway problem. I just thought that the kaaz diff would be helping not hurting my handling. I also have the upper strut brace and lower tie bars but I'm not convinced they will help a lot.

Does anyone have any suggestions?

 

The diff is for traction, not handling.

You're probably going into the corners too fast.

 

whens the last time you got an alignment done? tires sqeeling around turns even under very little acceleration is signs of the toe being out of spec.

 

Possible that it's suffering from alignment issues. I forgot that we swapped on the rear disc conversion with all the integra parts. I wouldn't say that a diff is only for traction. I know they have some understeer issues but this car is insane. Maybe it's toed in a little... where did my tape measure go?

-Michael

 

An LSD won't make your car understeer more if it's working right. I remember reading that ('LSDs tend to make a car understeer more, blah blah blah') in Sport Compact or something a year or so ago and thinking, "WTF? These people are retarded." If that's what you're basing that idea off of, it's just wrong.

You DO need an alignment with that much of a suspension change. If you didn't do it already, that KAAZ diff also has to be broken in properly, which involves driving around in figure-8s in a parking lot. It's also a very aggressive diff, and will bite hard when you get on the gas like you're saying. If this is mostly a street car, that was probably a bad choice. You could've saved yourself some money and gone with an OEM ITR unit, and had no break-in or adjustment issues.

 

Well, don't 1.5 lsd's lock under decel too? I would never get an 1.5 or 2.0 on a fwd, just for the fact that when going into a corner the outside front wheel needs to spin more times becuause it goes around a larger radius.

With the 1.5 unit you have on it, its not letting the outside wheel spin enough, thus causing the car to understeer.

Just my .02 though...

 

No, 1.5 is pretty ideal for road-racing/autocross applications. You're right that it locks a little under deceleration, but not in an inhibitory way. The 1-way is for drag-racing, to give you an idea. 2-way on a FWD would be not so good.

 

The diff cost me $400 installed so I wouldn't call it a waste of money. The alignment did help a little as it was suffering from a little toe-in. It is a 1.5 way and yes I did break it in properly. Next time I'm getting an employee to break in a diff!

Where did I get the idea that an LSD causes understeer? The physics behind it. WendysOrBust is right on the money as for why it understeers. Of course a VLSD won't do this as its lockup is based on the delta between the wheel speeds.

Main thing I'm curious is how to get this car to handle a little better. With a proper alignment some of the unpredictability in the handling has been sorted out but it's still in there, even during high speed cornering.

-Michael

 

I never had ANY problem with the KAAZ-equipped car I had understeering. Not even a little bit. That had heavier rear springs (12K I think, with 10K in the front), and a 22mm rear sway with a GSR front sway, whatever diameter that is. I hated the shocks, but definitely, definitely, DEFINITELY had no issues with understeer whatsoever. I understand what you're saying about the physics behind it, but that "0.5 way" part of it shouldn't interfere that much. A 2-way would interfere exactly as you're describing. I would say there's either some other part of your system that's off (you haven't stated with springs, shocks, swaybars, tires, and tire pressures you're running), or maybe on the off chance they installed the wrong diff.

Edit: And where the hell did you get that for $400 installed?