New here, Angled 4 link rear end, datsun 200sx, Help
Posted: Wed Jan 22, 2020 8:47 pm
Wow, I just found this site, while searching for an answer to why cylinder pressure is higher than calculated CR * 14.7 pis (ambient air pressure). Signed up immediately! Thanks to the team for running this.
OK. I have a 1981 Datsun (Nissan) 200sx, that I run in 24 hours of Lemons and Lucky Dog endurance racing series races on the west coast. S110 chassis. The front end is struts and lower control arms (LCAs) with tension rods (TC) from the front radiator support. I have spacers under the struts to lower the LCAs to control camber changes, since the car is lowered a bit via coil overs on the 280zx front struts (slightly bigger, vented rotor upgrade). Adjustable LCAs to move the bottom of the struts outward (camber adjust), and slight modified upper mounts to provide camber (static mount). Stock anti sway bar.
the rear of the car is a solid rear axle with straight front to rear- long lower link arms mounted to the underside of the rear seat floor. The upper links are angled out from the rear differential area, to under the rear seat area. A rear anti sway bar is hung under the rear axle and the ends are tied to the lower links. Coil springs. See link below for a picture.
The car feels like the rear end is angled out in corners, wants to walk out. The roll center on the front is low, near the ground. But the rear roll center is defined by the upper link arms, so its High, at the top of the differential. I think that is a problem. I've been trying to figure out how to fix this, thinking that the change in length of the rear links under cornering is causing the rear axle to twist vs the body center line and causes the outside rear wheel to move back, while the inside moves forward, and that is why the rear end feels like its walking outward.
I've though about adding a panhard rod to move the roll center lower. but I'm looking for ideas. Thanks
http://repairguide.autozone.com/znetrgs ... 099ba8.gif
OK. I have a 1981 Datsun (Nissan) 200sx, that I run in 24 hours of Lemons and Lucky Dog endurance racing series races on the west coast. S110 chassis. The front end is struts and lower control arms (LCAs) with tension rods (TC) from the front radiator support. I have spacers under the struts to lower the LCAs to control camber changes, since the car is lowered a bit via coil overs on the 280zx front struts (slightly bigger, vented rotor upgrade). Adjustable LCAs to move the bottom of the struts outward (camber adjust), and slight modified upper mounts to provide camber (static mount). Stock anti sway bar.
the rear of the car is a solid rear axle with straight front to rear- long lower link arms mounted to the underside of the rear seat floor. The upper links are angled out from the rear differential area, to under the rear seat area. A rear anti sway bar is hung under the rear axle and the ends are tied to the lower links. Coil springs. See link below for a picture.
The car feels like the rear end is angled out in corners, wants to walk out. The roll center on the front is low, near the ground. But the rear roll center is defined by the upper link arms, so its High, at the top of the differential. I think that is a problem. I've been trying to figure out how to fix this, thinking that the change in length of the rear links under cornering is causing the rear axle to twist vs the body center line and causes the outside rear wheel to move back, while the inside moves forward, and that is why the rear end feels like its walking outward.
I've though about adding a panhard rod to move the roll center lower. but I'm looking for ideas. Thanks
http://repairguide.autozone.com/znetrgs ... 099ba8.gif