Need some Spring advice... Options

[D1A3]

I have a stock '76 2.0L car and have been pretty successful in AutoX at the local PCA and SCCA level. For PCA, I run in the PA class.

I currently have red Koni's (age unknown) with 90 pound springs on the car. I also have front and rear factory sway bars. The shock/spring combo seem to work well enough for street and reasonably aggressive driving

My problem is that my rear end seems to come up and dance all over the place when I'm AutoX'ing and I'm trying to get it more planted for the upcoming season. I've had folks recommend I upgrade my rear springs to everything from 140 up to 180 lbs.

Any thoughts on what springs I should go with? I'm not looking to replace the shocks and springs or do any other suspension changes right now as I can drive the car very well in AutoX, but want to try and pickup some handling and hopefully a little time.

Below is a pic of my car from behind to give you an idea of what I'm trying to correct.

Thoughts?



I appreciate any and all comments! :-)

[Borderline]

It took me a long time to figure out how flexible the 914 chassis is. All the suspension tuning I was trying to do, the car pretty much felt the same. Some of the guys around here were running their targa tops tightened down good and tight to get some chassis stiffness. I made my own C/F targa top and attached it rigidly and it made a huge improvement. I would recommend running with the targa top installed and stiffening both ends of the car to reduce body roll. If you feel the inside rear tire spinning at corner exit, you may want to try removing the rear bar and see if it helps. FWIW

[Randal]

It took me a long time to figure out how flexible the 914 chassis is. All the suspension tuning I was trying to do, the car pretty much felt the same. Some of the guys around here were running their targa tops tightened down good and tight to get some chassis stiffness. I made my own C/F targa top and attached it rigidly and it made a huge improvement. I would recommend running with the targa top installed and stiffening both ends of the car to reduce body roll. If you feel the inside rear tire spinning at corner exit, you may want to try removing the rear bar and see if it helps. FWIW

And listen to Bill as his 914 will break your neck on a corner. And he accomplished that without a cage which is pretty impressive. You gotta love the engineers!

No question body lean is something that 914's don't like. If your driving corners on the limit body lean will induce spinning IMHO, especially in high speed sharp transition corners.