T Montague's 2zr swap - '08 m/t sedan some extra info

[06YarisRS]

Originally Posted by tmontague

lol definitely do tires first, but that of course will let you down the road of suspension. IMHO I would recommend 340TW BFG G-force sport comp 2's on your set up. You will never realistically (or safely) push past their limit on public roads and they are phenomenal and predictable in the wet. Anything more than simple lowering springs and slightly stiffer dampers would start to make you regret your decision over time...trust me I have been down that road and I was ok with it because my cars was becoming a dedicated track car but therre is no way I would have been dailying it much longer.

An LSD won't help you too much in a straight line at least not width typical Yaris tires. I still spin my tires if I take off from a dead stop with sticky tires at anything close to WOT. The LSD in my experience is the most beneficial when at the absolute limit of grip in the corners and you want to put down the throttle. It actually helps you pull forward and steer your car through the corners. Also really helps you control a snap oversteer by throttling out of it whereas an open diff will just spin the inside tire. The better driver I become the most I appreciate the clutch type diff.

Dave at Speed Academy is by far a better/more experienced driver than me so put those times in perspective...to be fair though he also doesn't have a ton of seat time in some of those cars he did laps on. The cars that they built he has a ton of seat time in, but some of the lap times are on viewers cars that he does a few hot laps in.

The 2016 STI no doubts pulls harder and faster in the straights however TMP is a track that is considered relatively low speed, very tight and extremely hard on brakes. It favours momentum cars or at least better drivers as there are less places to simply got WOT in a straight to make up for poor cornering and poor driver skill.

My car and myself are much faster on the infield at TMP as I can carry more speed through the turns and the Yaris transitions from corner to corner much better. Much of this has to do with the low weight of the Yaris compared to the STI - the Yaris is much more "flickable" side to side and part of which makes it such a blast to drive. Keep in mind my Yaris is still only putting down somewhere in the ball park of 138ish whp.

There is no doubt that the Yaris is being driven past its limits compared to many other big power cars at TMP. According to spectators they Yaris and cup cars are a blast to watch as they are screeching around corners and lifting wheels where as the other cars typically are much more cautious.

I checked out the Sport Comps. The smallest size is 195/50R15. Unfortunately this is out of spec for my factory alloys which is what I intend to keep on the car. I do actually have 195/60R15s on the car now, but there's a bit of sidewall bulge. It still handles well and the tires won't come off, I think, under extreme cornering, but it might defeat the purpose of the performance tire. A.K.A. I might not reap the benefits of such a great performance tire. Also, with the lower side wall height of the Sport Comp, the sidewall deformation might even be exaggerated.

Yeah, I might not see a lot of benefit from an LSD, and certainly wouldn't be worth the hassle and expense of installing one on this auto trans, although I believe there migh be one available. I know though that I could improve my 0 - 60 time without the amount of wheel spin I get. I'd really love get close to 6s, pipe dream, I know. I'm pretty sure that 7s might be attainable with the right launch as the car sits.