that's cool and all... but the wheels az... what about my wheels/tires fitting??? lol
With the 25mm spacers, you will at a plus 38 offset. This offset will stick out 26mm more than my 17x8 45et did. You can look at the link here;
Wheel Offset Calculator
I also have a set of 14.3 LBS 17x8 w/45 offset for sale. They are forged Motegi Traklites. They are the lightest 17x8 wheels on the market. I had them on the MX-5 I used to auto-X. My issue was a lose old nut behind the wheel.
I'm guessing you have a stick and the xB has more torque than your S2K had. I'm sure it's geared a lot taller in 2nd. I would also get the TRD quick shifter. ( I'm also selling ) I can't see you getting into 3rd on a auto-X course. The shift from 1st to 2nd with this shifter was like our 06 Mini Cooper S.
The 245/45's are about 1/2" taller than your 255/40's, but your have an inch wider wheel. I don't think they will fit without rubbing, but there are many on the site that have wide wheels, but they don't auto-X. I'm guessing you are going to try to see if they will fit under the fender.
The Scion has a 60.1 hub size. I don't know if your are running hub rings, but if you heat up the hubs, you will melt plastic hub rings. You will need good spacers, and I know good spacers aren't cheap. I ran 40 psi on the front of the xB because it's really noise heavy. Camber bolts will be a must have!
I have no idea where SCCA will class an modded xB.
I had 245/45-17's mounted on a 17x8 w/ 45et and the only rubbing I could get was up inside the front fender well. I had to try to get it to rub. I really didn't look for where it rubbed because like I said, I had to try to make it rub.
I talked to an owner that had 235/30-20's. I didn't know what his offset was but, he rubbed on the front liner when he would turn L or R. I asked him if he knew the offset, but he was clueless!
For HP, you can mod the air filter box, and I cut out every slat in the left side grill. The Scan Gauge said I was with-in 2 degrees of outside air temp. Exhaust mods, have a good exhaust builder that can make you a good S-pipe. The S-pipe has the rear 02 at the front top of this pipe. Cut out the "scuba tank" it really chokes the exhaust gases! I had a system built in mandrel tubing, I used 6" round x 14" in 2.25" muffler in place of the scuba, but if I was to do it over I would try to install the Magnaflow 6" round x 27" muffler 2.5" and no clean up cat. Then I would add another 5" x 8" x 14" or 18" at the end. Trust me the xB drones like no other car I have been in. That big inside cabin really drones plus the 2.5" will add a lot of volume!
I know you asked about another lowering springs but for auto-X your going to need a much stiffer spring. The TRD & rear sway-bar mate well together. The TRD rear-sway-bar is sold and made in Japan. Hotchkis also makes a set of sway-bars. You might want to try them. There rear design is old school as the 1st design of the TRD was the same as the Hotchkis but my talks with TRD said it would cause some type of binding.
Good luck,
AZ
