Kelly, I have a 2013 Gt that is lowered 1.5 inches front and back. I am still on stock dampers and struts. I have the BMR adjustable panhard bar intstalled. I have 3.73 gears and I am on stock 19" tires and wheels. My question is I tried to measure pinion angle and I believe it came to zero. So I ordered BMR lowering brackets and BMR LCA with poly bushings. I am going to set the brackets in the middle hole to try to get LCA back to level. I am wondering...once I lower the LCA shouldn't it in theory lengthen the geometry of the rear suspention giving back my stock pinion angle.I'm thinking by about 1/8 to 1/4 in forward...am I correct...Thanks Lyle...I don't plan on taking car to track,just spirited driving !!
We do compensate for the arc, in our positions on the LCA Brackets.....BUT, that only "works" if the brackets are EXACTLY where they should be positioned. It is difficult to ensure each and every installation is exact....it is tough when dealing with increasing the length of the lever.
Your best choice would be to just install the components, and see where your at afterwards. Let me know.
maybe Mr. bmr can help me
uca in top hole. -2 pinion angle. lowers in middle hole. launch rpm 5000. 26x8.5 slicks. wicked hard initial hit and bogs! all the way down to about 2000rpm. then it has to pull itself back up. only a 1.80 60ft???
Too much hook!!!! Anytime you find this happening, you should thank me. It's simple from here on out. Your goal is to either launch higher, or promote some wheel speed. Either will improve your 60' drastically.
Try 5500....6000...6500....etc.
If you are scared of RPM, raise the LCA up a hole and raise the tire pressure 1-2 psi.
Let us know!
Odd behavior question. When flooring it in first / second, the rear end of the car has always gently swung out. Generally it would swing out to the left in first, then a little to the right when I caught second (Note this is with Advance Track enabled). I could always just "drive through it".
After adding BMR LCA relocation brackets (using top hole) and J&M tubular LCA's, the rear seems to break loose much more violently. There's a ton more lateral movement to the point of almost losing control. The rear really starts coming around. Any idea why the behavior has changed?
Other car details: 13' GT Track pack 6sp, 3.73's, Hotchkis springs, staggered wheels / tires. 255 P-Zeros front, 275 rear.
It sounds like you may simply be overpowering the P-Zeros.
Try to lower the tire pressure a bit, and see if it helps. Occasionally, this can happen, where the increased anti-squat can cause the tires to spin even more. A softer compound tire, or stickier pavement is usually the fix. Our upper control arm Mount, in the upper position, should help too.