diff --git a/src_rebuild/Game/C/bcollide.c b/src_rebuild/Game/C/bcollide.c
index 96f2f0c1..5a2d9001 100644
--- a/src_rebuild/Game/C/bcollide.c
+++ b/src_rebuild/Game/C/bcollide.c
@@ -45,8 +45,8 @@ int bcollided2d(CDATA2D *body, int* boxOverlap)
 	}
 
 	// hmmm, why?
-	as = rcossin_tbl[(dtheta & 0x7ff) * 2];
-	ac = rcossin_tbl[(dtheta + 1024 & 0x7ff) * 2];
+	as = RSIN(dtheta & 0x7ff);			// rcossin_tbl[(dtheta & 0x7ff) * 2];
+	ac = RSIN(dtheta + 1024 & 0x7ff);	// rcossin_tbl[(dtheta + 1024 & 0x7ff) * 2];
 
 	delta.vx = body[0].x.vx - body[1].x.vx;
 	delta.vz = body[0].x.vz - body[1].x.vz;
diff --git a/src_rebuild/Game/C/handling.c b/src_rebuild/Game/C/handling.c
index 44311dac..891b4773 100644
--- a/src_rebuild/Game/C/handling.c
+++ b/src_rebuild/Game/C/handling.c
@@ -971,15 +971,11 @@ void InitialiseCarHandling(void)
 // [D] [T]
 void CheckCarToCarCollisions(void)
 {
-	int fz;
-	int fx;
-	int sz;
-	int sx;
+	int fx, fz;
+	int sx, sz;
 
 	int loop1, loop2;
-	int lbod;
-	int wbod;
-	int hbod;
+	int lbod, wbod, hbod;
 	int xx, zz;
 
 	BOUND_BOX* bb;
@@ -988,7 +984,6 @@ void CheckCarToCarCollisions(void)
 	CAR_DATA* cp;
 	SVECTOR* colBox;
 
-
 	if (ghost_mode == 1)
 		return;
 
diff --git a/src_rebuild/Game/C/wheelforces.c b/src_rebuild/Game/C/wheelforces.c
index b81b652c..e8b343ba 100644
--- a/src_rebuild/Game/C/wheelforces.c
+++ b/src_rebuild/Game/C/wheelforces.c
@@ -13,6 +13,8 @@
 #include "glaunch.h"
 #include "system.h"
 
+#define GRAVITY_FORCE		(-7456)			// D1 has -10922
+
 struct CAR_LOCALS
 {
 	LONGVECTOR4 vel;
@@ -520,9 +522,9 @@ void AddWheelForcesDriver1(CAR_DATA* cp, CAR_LOCALS* cl)
 void StepOneCar(CAR_DATA* cp)
 {
 	static int frictionLimit[6] = {
-		0x3ED000, 0x178E000,
-		0x3ED000, 0x13A1000,
-		0x75C6000,0x13A1000
+		1005 * ONE, 6030 * ONE,
+		1005 * ONE, 5025 * ONE,
+		1884 * ONE, 5025 * ONE
 	};
 
 	volatile int impulse;
@@ -532,14 +534,9 @@ void StepOneCar(CAR_DATA* cp)
 	int a, b, speed;
 	int count, i;
 	CAR_LOCALS _cl;
-	LONGVECTOR4 deepestNormal;
-	LONGVECTOR4 deepestLever;
-	LONGVECTOR4 deepestPoint;
-	LONGVECTOR4 pointPos;
-	LONGVECTOR4 surfacePoint;
-	LONGVECTOR4 surfaceNormal;
-	LONGVECTOR4 lever;
-	LONGVECTOR4 reaction;
+	LONGVECTOR4 deepestNormal, deepestLever, deepestPoint;
+	LONGVECTOR4 pointPos, surfacePoint, surfaceNormal;
+	LONGVECTOR4 lever, reaction;
 	VECTOR direction;
 	sdPlane* SurfacePtr;
 
@@ -559,7 +556,7 @@ void StepOneCar(CAR_DATA* cp)
 	}
 
 	cp->hd.acc[0] = 0;
-	cp->hd.acc[1] = -7456; // apply gravity
+	cp->hd.acc[1] = GRAVITY_FORCE; // apply gravity
 	cp->hd.acc[2] = 0;
 
 	// calculate car speed