Going for broke

[Toy_Yoda]

Amazing! Any additional support to the main bearings? Curious to know who's rods your running and if the crank is stock.

[Blown_xa]

Originally Posted by Toy_Yoda

Amazing! Any additional support to the main bearings? Curious to know who's rods your running and if the crank is stock.

no main bearings support other than stock main bearing caps. Crower rods, CP pistons, Supertech valvesprings are only internal upgrades. Stock headbolts, stock intake manifold, stock throttle body.
My build focuses on trying to achieve good numbers and reliability without spending tons of $. xbgod boasts about his $40k motor build, and is producing the same numbers without spray. 90% effect with 10% of the effort (and $) is what I aim for. Don't get me wrong, I use all good parts. Haltec and return fuel sytem are running the show.

[cali yaris]

^ Amen. I run stock crank/bearings/cams/valves as well.

[Toy_Yoda]

A truly inspiring and smart build! Nice to know that other than rods and pistons these little engines are so robust. The plans I have for my XB after next smog inspection February is a Blitz supercharger and piggyback fuel management on stock internals. While I'm enjoying the modest gains I'll see from 6 lbs. boost, I plan to build another engine that can withstand the higher boost I can get from a turbo. I'll be sure to take a clue from you and change out the valve springs once the rev limiter is history. Looking forward to seeing the dyno pull once you get a new turbo sorted out and if it's reliable as the last build.

[CTScott]

Nice! Any pics of the Hayabusa style plumbed in?

[Blown_xa]

Originally Posted by CTScott

Nice! Any pics of the Hayabusa style plumbed in?

in this very thread, few pages back

[Bluevitz-rs]

What failed? Bearings?

[Blown_xa]

Originally Posted by Bluevitz-rs

What failed? Bearings?

oil starvation, do to a piece of debris in feed line.

[cali yaris]

SWEET. great numbers

[Blown_xa]

update: Did my first track event with this much power, I attended Grip Fest which is a time attack. First lap, 3rd gear broke. Our transmissions cannot handle over 300whp doing anything other than drag runs, and daily driving. This was a downer because I drove from 4 hours away to compete , and I didn't think I would be able to make it home ( transmission sounded like ice in a blender ).
Call me crazy, but to put myself in a better mood ...... I decided to make a few runs anyway, skipping 3rd gear. I turned my boost controller off running about 230whp, And posted the 3rd fastest time of the day overall! What an adventure ! On top of that, I was able to make it back to the hotel 70miles away.
The next day was the final autocross for the year, a series which I have been competing in for points. I was leading my class for points, but if I didn't compete I would be handing over the lead. So what did I do? I autocrossed my broken car, and secured the class win. My transmission was SO BAD, that it stopped my car from rolling several times as I was driving through the pits.
Next mission was to make it back home, 120 miles away........... By some miracle , I made it.
Video of the weekend coming soon.

[Bluevitz-rs]

All I can say is , WOW!

So have you decided on what way you're going to with a new transmission? I vote C160.

[Blown_xa]

My next course of action is to remove to LSD from the broken transmission , hopefully it is ok. I have my original transmission sitting on a shelf, and it is good. The broken one had taller/Yaris gears. I would like to a transmission cooler setup, just like our time attack tC. Basically takes the oil from the drain plug, pumps (elecric pump) oil through cooler , then back through oil squirters tapped into trans casing aimed at each gear.

[Jason@SportsCar]

Originally Posted by Blown_xa

My next course of action is to remove to LSD from the broken transmission , hopefully it is ok. I have my original transmission sitting on a shelf, and it is good. The broken one had taller/Yaris gears. I would like to a transmission cooler setup, just like our time attack tC. Basically takes the oil from the drain plug, pumps (elecric pump) oil through cooler , then back through oil squirters tapped into trans casing aimed at each gear.

I may have a spare Yaris FD if you need a set.

[thefalls]

Now this is quite something. Congratulations! Its a challenge to keep moving in such circumstances.
What gearbox [the one which broke] were you using? C56?

I had some issues lately when i had an autocross event. Gear selector cables broke,managed to change them and then radiator started leaking,managed to fix that too [a friend who repairs radiators for a living was around] and then i won :)

[cali yaris]

^ haha, me too.

Our transmissions cannot handle over 300whp doing anything other than drag runs, and daily driving.

well, knock on wood, but mine has been fine for a handful of track days.

[Blown_xa]

Originally Posted by cali yaris

^ haha, me too.



well, knock on wood, but mine has been fine for a handful of track days.

You lucked out I guess, this is the first transmission failure in the life of this car which isn't too bad I guess ( considering ). I grew used to the tall Yaris gears, however now that I have a high rev limit, I may be better off going back to my xA gearing . I am really hoping my Kaaz lsd is ok. Does anyone know detailed info on the Kaaz gearset? Are they stronger? I know the ratios are closer..... but I would want that set more for a strength upgrade.

[fnkngrv]

Originally Posted by Blown_xa

You lucked out I guess, this is the first transmission failure in the life of this car which isn't too bad I guess ( considering ). I grew used to the tall Yaris gears, however now that I have a high rev limit, I may be better off going back to my xA gearing . I am really hoping my Kaaz lsd is ok. Does anyone know detailed info on the Kaaz gearset? Are they stronger? I know the ratios are closer..... but I would want that set more for a strength upgrade.

I have been told that this is the only option that we have with the C50. The only other real option would be to upgrade to a TRD Vitz RS Turbo Transmission however from what I have found from research the only way to get that is to purchase a half cut of a TRD Vitz however also on the same token I have read that they are rare. I will be very concerned myself once my engine upgrades are complete on the tranny holding up, but then again I won't be overly aggressive with it since I am do straight line racing so the stock one might hold up, but I am not holding my breath. I have already burned through 1 tranny and that is with only having 50k stock and 20k boosted (7-9psi) miles on it.

[thefalls]

The C56 transmission from the Vitz RS is quite strong. The same transmission can be found on the Toyota Starlet Glanza [two door starlet with the 4efte]. But they have a limit too,around 300whp max [dont remember the torque figures] and they are known for 3rd synchro failure on high powered set ups.