Stay tuned

[Jason@SportsCar]

Originally Posted by cali yaris

how does an aluminum flywheel fit into your class? I'm still so confused about what you can do and can't do.

Loren posted the applicable section, and as he inferred the Solo and Club Racing rules are typically different. Even more confusing in some cases due to the class acronyms being similar, but having different meanings - Solo P=Prepared, Club Racing P=Production.

However, in our case (HP limited prep, Level 2) our rule set is very similar to the GP Solo rules. Unfortunately the Solo Events Board elected not to allow the Yaris in GP, so we can not competitively race our car in HP trim in Solo - it goes to EP, where it is way under prepared, and way under powered.

In a nut shell:

Body - Car is gutted and has a minimum 6 point cage. On-board fire system, kill switch, race seat, 5-point harness, window net. Drivers and pass side windows must be removed. All other glass can be replaced with plastic, 1/8" for side and rear, 1/4" for windshield. Hood and hatch/trunk may be replaced with composite units. Bolt-on fenders may be replaced with composite ones. Uni-body (rear) fenders may be cut and flared, composite may be added. Crash support beams behind bumpers can be removed.

engine - Level 2 prep must keep stock throttle body and fuel injection (injectors, fuel pump and regulator can be replaced, you just cant change the TB or manifold) . We can do port matching, valve job, cams, compression bump with a limit set by SCCA (we still have not received our spec, but most every car can go +1 pt), over-bore, balance & blueprint. CAI, header, no emission, exhaust just needs to exit behind the driver and be under 103db @ 50'. Engine management is open.

trans - if we use a stock trans no issues, shifter is open, clutch/pressure plate and flywheel are mostly free (no carbon multidisc units). We can also change ratios and use dog engagement, but you get a weight penalty. Final drive is open. LSD is open.

brakes - must use OE front caliper. Front rotor can be changed to a two-piece (aluminum hat), but must be stock size, and can not cross-drilled or slotted. Rear may be converted to disc, but can not be larger than the front OE brakes, and the rear rotor must be a solid non-vented disc. Brake lines, pads and master cylinder are open.

Suspension Level 2 prep - Stock pick up points (you cant move the rear beam mounts like many Yaris owners like to do ), shocks are open, springs are open but must be in the OE location (this means no coil-overs in the rear, but you can use an adjustable perch fitted in the stock location). Swaybars are open. Bushings are open. Camber adjustment is open.

Wheels and tires - 15"x7" max wheel size for the Yaris, smaller is ok. Any tire that you can fit on the wheel, but the top of the tire must be covered by the bodywork.

Minimum weight for the Yaris in HP is 1900lbs (w/driver) using a stock trans.

There is more, but those are the basics.

[cali yaris]

Loren, I race in SCCA. I've read through the rules more than once. Why would I post the question if I could find it (easily) in the rulebook?

If Jason doesn't have time to answer, he won't answer, and that's fine. Seems to me, there has been plenty of helpful posting about keeping the car within the rules.

[Loren]

I looked at the link I posted and found the answer very quickly. Any flywheel the same size or larger than stock is permitted in HP. I don't understand your angst.

His flywheel will surely be within the rules for his class.

[Loren]

Upon further consideration, I think I see the problem. Garm, do you "race" with SCCA or do you "autocross" with SCCA? There's a big difference. Jason is building a "race car" in accordance with the SCCA "GCR" (General Competition Rules), which is the road racing rule book. I'm guessing what you've read is the SCCA Solo II rule book, which is a completely different animal and does not apply in any way to the car that Jason is building.

[kngrsll]

i really like NASA's TT rules... its a points based system. I am going to do a few events in TT-F this year,

[Jason@SportsCar]

Originally Posted by kngrsll

i really like NASA's TT rules... its a points based system. I am going to do a few events in TT-F this year,

The NASA system works well for the people who show up off the street with a car that is already setup. Take some time to look at the book and plan the build of a car from scratch, it will get expensive fast - especially if you take the time to test the various points combos to see which is the fastest.

With SCCA everyone in the same class gets the same mods. You can only spend so much.

[cali yaris]

Jason, thanks that is really clear.

Can you use TRD or solid engine mounts? Those work really well in my car.

Also consider the 23mm sway bar, it's +4mm over the TRD one.

[Jason@SportsCar]

Originally Posted by cali yaris

Jason, thanks that is really clear.

Can you use TRD or solid engine mounts? Those work really well in my car.

Also consider the 23mm sway bar, it's +4mm over the TRD one.

Yes, we can change the engine and trans mounts. I should have had them done while the clutch was being changed and the trans was out. Oh well, we can do them when we pull the motor later in the season.

We put an adjustable bar on the rear.

What are you doing posting on here... You should be in Fontana. KJ just brought his STX RX-8 by the house for a tire change, he killed his tires in the AM session. Now he is all set for Sun.

[cali yaris]

I should be out there, for sure! I'm going tomorrow.

The trans mount alone will make a very big difference and it's an easy bolt-on.

[cali yaris]

stock Yaris hood is 12.75 pounds.
Those are cool latches, did you make something to hold the pins? I couldn't get them to line up.

[Jason@SportsCar]

Originally Posted by cali yaris

stock Yaris hood is 12.75 pounds.
Those are cool latches, did you make something to hold the pins? I couldn't get them to line up.

Cool, we pulled around 8lbs off the front.

I just ran a piece of flat stock from the OE hood cushion mount to where I needed the pins to end up.

I wanted to mount them the other direction (90 degrees from what you see) but you can only get 5 degrees of tilt out of them and still have the pins engage. By putting them sideways you have a lot more flexibility, and they are way easier to line up.

[thebarber]

are you adjusting a/f, vvt or both w/ the camcon for power #'s?

[Jason@SportsCar]

Originally Posted by thebarber

are you adjusting a/f, vvt or both w/ the camcon for power #'s?

VVT and fuel trim.

[mojoyaris]

I have the same problem with fuel starvation and since the car is setup to run lean, after a good hot run, she just runs out of gas and is pooped. This only happens when I'm running the car 90/90 (90% of power bandwidth, 90% of the time).

Time for a piggy back, bigger injectors, fuel pump and Throttle body.

[Jason@SportsCar]

Originally Posted by mojoyaris

Time for a piggy back, bigger injectors, fuel pump and Throttle body.

We think the issue is the tank/pickup, as we only had this problem in Turn 6.

Certainly a new fuel pump, one with a better pickup design could help, if that is in fact the issue.

But putting more demand on the fuel system with some of those other parts could make the issue worse.

Piggy back is in the works. We can not touch the throttle body. And we are looking at fuel cell options.

[YarisPR]

Originally Posted by Jason@SportsCar

We think the issue is the tank/pickup, as we only had this problem in Turn 6.

Certainly a new fuel pump, one with a better pickup design could help, if that is in fact the issue.

But putting more demand on the fuel system with some of those other parts could make the issue worse.

Piggy back is in the works. We can not touch the throttle body. And we are looking at fuel cell options.

Jason, can u confirm if what I wrote earlier happens to you? cause the syptoms are the same and u probably find the answer sooner than me

[Jason@SportsCar]

Originally Posted by YarisPR

Jason, can u confirm if what I wrote earlier happens to you? cause the syptoms are the same and u probably find the answer sooner than me

I don't think we are experiencing the "same" problem. On Saturday this happened well into the race, with two laps to go, and less than a 1/4 tank of fuel. On Sunday I got on lap 3 with half a tank, and then again near the end of the race when the low fuel light was on - but always in the same turn.

[cali yaris]

Time for a piggy back, bigger injectors, fuel pump and Throttle body.

YES