Lazer FS/SP with Rear mid conversion

[kek23k]

Has anyone tried this yet? If so, was it better or worse and have you kept it or gone back to standard. I'm just curious why the RB5 has basically moved from its standard suspension to the rear-mid, but with the SP and FS they have gone to standard RB5 suspension.

[Jez]

Originally Posted by kek23k

Has anyone tried this yet? If so, was it better or worse and have you kept it or gone back to standard. I'm just curious why the RB5 has basically moved from its standard suspension to the rear-mid, but with the SP and FS they have gone to standard RB5 suspension.

tried ages ago,was better but tbh the sp conversion is the dogs,ask anyone who has converted.then theres the fs,thats another story.if you find an sp conversion at right price,buy it.ta jez.

[kek23k]

But did you try the SP with the rear-mid conversion?

[Jez]

Originally Posted by kek23k

But did you try the SP with the rear-mid conversion?

why would you??????????

[RogerM]

The reason for changing the wishbone length is to change the effective roll centre range available.

The rear of the ZX5 was a little too loose, the shorter wishbones help increase tire contact patch load via the roll centre changes thus locking the car in a bit more.

In short the change was to help balance the front and rear ends on the original ZX5.

The SP/FS wishbones provide a well balanced car and the fronts were designed to work with the narrower rear end. This is a trick I used many moons ago when designing the Mako. Lots of people asked why the car wasn't on max width at the rear, I'd start to explain and the eyes would glaze over ....... lol

RB5 went to longer rear wishbones (the opposite change) to achieve the opposite result. The original RB5 was too locked in at the rear and didn't rotate smothly on high grip surfaces. The longer wishbones allow the car to rotate far more progresively and thus make it much easier to push the car hard.
Simply put the RB5 is now the best 2wd I have ever driven, loads of grip, loads of steering, awesome bump handling but silky smooth.


Hope that helps.

[kek23k]

Cheers for the detailed response Rog, I appreciate it