My most recent project is a Grassroots Motor Sports $2011 challenge car build and we are using a 2003 WRX rear crossmember from disc to disc with 3.55 vlsd diff (a major improvement over the 2.93 1 wheel diff in the wimpy 7-1/4 stock rearend. First question; should the lateral link remain parallel with the road? Or what is the prime angle for the suspension geometry?
My dad made brackets out of 1/2" steel and when everything if flush square an plumb.... Then we will weld the brackets in place.... We are concerned that the crossmember may be mounted too high....
The lateral links need to have some angle (lower at the knuckle than the crossmember) to keep the roll center fairly high. But the hard part will be the strut towers. The exact location and angle there will be very important.
Strut towers are also figured out! We will mock-up a wrx rear strut tower brace as a guide, :Hell, even use it as a template for the mounts.... And trailing arms won't be so bad.
between all the births and deaths in my family I havlost track of this project till recently... we have abandoned the WRX rear end, the cost was too great to keep the car in the guidlines for the competition. it would have been awesome to have indpendent rear suspension, but that ship has sailed. The turbo is install on the slat six, my Dad started her up and though he could use vacuum tubing and radiator hose... that did not work well... no he understands that we NEED hard piping (watch the video, good for some laughs for sure) for the record I knew that the flex tubing would not work, but he though we should try... so if you were ever courious as to what would happen, press play...
I dont see how that could ever work.....You'd be blowing boost right back out the top, Make a carb in a box, or a draw through setup.
It is a draw-thru set up, look closely -the air is sucked in through the carb -then into to the split stack adaptor on top of the intak manifold -then in to the turbo inlet side -then throught the compressor back into the split stack adaptor and in to the manifold
if you have room under the hood it is a nifty set-up for a draw-thru.... I told my dad if it were any taller we would have to mount a flashing beacon on it as required by the FAA.
