Your car looks extremely low.... doesn't that cause problems?

are those tabs on your rollbar for mounting your hardtop? I have never seen it done that way. how does that work?

Nice that you didn't have to gut your doors and windows....you can still drive it to work.

 

I opted for the Nascar bars just for that--ease of entry. The tabs are for the HT mounting. These pics were taken just after painting the cage. the top will stay on most of the time. I doubt I will make it to Ohio--maybe in the future. The car is low but havent had any problems so far--what are you thinking of?

 

bump steer? I had my car corner weighed by a race shop who left it somewhat higher than yours... he said the susp arms needed to be closer to flat than at the wrong angle due to too low????

my car handled great, so I have no idea, but mine wasn't nearly as low as yours so i thought i would mention it.

nice looking cage!!!!

 

about the arms

 

I was afraid of that also. But so far I havent noticed it. I did need to get a bigger front bar. I had a Muz bar and have gone with a Gendron bar and plan to adj. it more stiff as I get some inside rear tire lift in some hard turns. I raced the car last weekend and it felt fine.

 

Does it help to tie in the shock/spring upper mounting points? Seems like that would add stiffness. (You could also help offset the weight by removing the factory rear stiffener bar.) I can't imagine any reason to go further back than that, though.

 

Yes, you want to tie the cage to the upper suspension mounts, not extend it into the trunk as there's no structural benefit to doing so.

 

By this you must mean, "it is not an efficient use of weight to do so". It DOES increase frame stiffness, but it would do it better and more efficiently if it were located directly where the loads come in to the frame.

 

I mean it's not the right way to do it.

 

Actually that is rollcenter, which can introduce bumpsteer if changed incorrectly. The S2000 front and rear roll centers are at different heights from factory.

Bumpsteer is when the tie-rod travels through a different arc than the suspension. So if one arc is shorter than the other, abrupt changes in toe can occur from suspension without steering input.

So essentially in theory, if your a-arms were parallel to the ground, the camber gain from bump would be zero.