To boost/improve Yaris, or move on....?

[Jason@SportsCar]

Originally Posted by OTB

I appreciate the input. I'll have a look at 4.xx final drive and lsd units. The flywheel feels so light on the stock yaris (heel-toes are just a tiny blip), I hadn't even considered there's lighter ones out there. Since the Yaris makes no torque out of the hole, does the lighter flywheel make streetability really suck (like starting up a hill, etc.)?

Wheels-I'll explore the options. 13" would be cool, especially with a smaller overall diameter tire, but for street class time attack, I'm not sure I'll find 13" compatible tires (RE-11, RT-615, Kumho XS, Star Spec, etc.) Race tires seem to be more available in funky sizes.

Again, thanks guys, I certainly studied up on Garm's posts, Jason's article in SportsCar, and Focus's install thread.

I'll try to have a good look at Jason's car at Miller and take some notes.

Without FI power you really need gear multiplication to make the car move, it is a world of difference.

The stock setup (flywheel/clutch/pressure plate) is 26lbs, our lightened setup is 18lbs. While it is a significant difference, it is totally street-able. The problem with most race setups on the street is to aggressive of a pressure plate/clutch combo, some of them are an on/off switch. We used a 3-puck solid hub clutch (weighs 1lb), but a very mild pressure plate - its not like we are trying to hold back 300hp - so it is easy to drive. The flywheel alone wont have much impact on how the car drives, it just lets it rev more freely.

If you are going to run a street tire class the 13"s wont work, there are no options for competitive street tires (140+ tread wear) in those sizes. I would go with a 15x8" wheel, and a 225 Hankook RS3.

I don't think we are going to make Miller this year, its not in the budget.

[why?]

Originally Posted by Jason@SportsCar

The stock setup (flywheel/clutch/pressure plate) is 26lbs, our lightened setup is 18lbs. While it is a significant difference, it is totally street-able. The problem with most race setups on the street is to aggressive of a pressure plate/clutch combo, some of them are an on/off switch. We used a 3-puck solid hub clutch (weighs 1lb), but a very mild pressure plate - its not like we are trying to hold back 300hp - so it is easy to drive. The flywheel alone wont have much impact on how the car drives, it just lets it rev more freely.

1 pound! Do I even want to know how rare and expensive it is before I get my hopes up? Is it something that can last on a daily driver?

[Jason@SportsCar]

Originally Posted by why?

1 pound! Do I even want to know how rare and expensive it is before I get my hopes up? Is it something that can last on a daily driver?

Nothing exotic at all, its right off the shelf from SPEC. The stock clutch disc is only 2lbs, and it is a full disc with a sprung hub.

I can't think of any reason it would not work for a daily driver. The solid hub is not as smooth as a sprung one, but you really only feel it in 1st gear.

[why?]

Originally Posted by Jason@SportsCar

Nothing exotic at all, its right off the shelf from SPEC. The stock clutch disc is only 2lbs, and it is a full disc with a sprung hub.

I can't think of any reason it would not work for a daily driver. The solid hub is not as smooth as a sprung one, but you really only feel it in 1st gear.

Oh, you made it sound like it was significantly less than stock. I go a little crazy with weight reduction. I hate the stock Yaris clutch with a passion, I am pretty sure Garm sells SPEC too. Thank You.