FANTASTIC NEWS! Red Racer was just invited to be one of the Fast 50 at the 2013 GRM Ultimate Track Car Challenge July 19 at VIR! Will also run the NASA Heat Wave Race that weekend!

 

Sweet!!!

 

Don't know if anyone saw this rule change: Technical Bulletin (3-27-13):

All Rotary Engine Vehicles:
Rotary engine vehicles may pre-mix any commercially available oil designed for 2-stroke engines.


c. Engine
1) Fuel: Any grade of commercially available unmodified gasoline or diesel--all octane levels
of retail available race gas are permitted. No “home brewed” methanol/ethanol/alcohol
mixtures are permitted. Methanol injection systems are illegal. Retail available E-85 is permitted.
Fuel additives are prohibited, with the exception that rotary engine vehicles may add any
commercially available oil designed for two-stroke engines as a "pre-mix." (nasaforums.com • View topic - Technical Bulletin--Rotary Fuel 2-stroke Pre-Mix--3-27-13)

 

I'm glad to know there is supporting documentation for what I've been doing all of this year

I religiously use Idemitsu Premix.

 

It's "technically" been illegal up to now.

 

Ooops! My bad, kbrewmr2!

Well, considering it was "in the fuel" when I did my dyno runs, I can say it was "factored in".

 

Joking aside, I'm happy to see an official rule around rotaries and premixing as I consider it key to engine longevity.

 

can i post here? test test

 

Since I can't start a new thread as my post count was for some reason reset...

I have a PT RX-7, but one of you 8 racers needs to go for ST3 or TT3...i have not the funds or I would be doing this...

The ST rules this year really favor an RX-8:
The 4-doors nets you an additional W:P allowance of 0.4
2-Rotor nets an allowance of 0.3
275 or smaller DOT tires allowance of 0.4
Assume a 2851lb car with driver, stripped and caged of course...lose 0.15

So you can run W:P at 8.05:1

The formula:
Turbo 13B-RE or REW swap, single turbo
Mapable electronic boost control to provide a nearly flat 353WHP in the useable RPM range
275 Hoosier A6s front and rear
all the rest is just details...

Average stock aero "spec" Z06 in ST3/TT3 for arguments sake:
3100lbs
357WHP
275 A6s

You can run a car with a flatter power curve and better handling at 249lbs lighter weight but nearly the same max HP

pretty favorable matchup if you ask me, especially for miller this year where turbo cars can easily adjust for altitude.

 

Heh we had the same discussion over on NASAforums...

RX8 doesn't qualify for the 4-door credit last I heard out of Greg. You guys are welcome to get that revisted... let us know how it goes.

 

Hey, that is some pretty cool news. Looking forward to the results.

Hummmm, interesting. Not sure I know of anyone that doesn't or hasen't pre-mixed for competition.

 

There was a ruling that the RX-8 is classed as a two door in NASA so you can scratch that, would have to bring the power down to about 335RWHP.

My long term goal for the car is to run in TT-2.
365RWHP with a naturally aspirated bridgeported 20b running RX-8 rotors.
275 Hoosier R6
2851lbs Minimum Weight.

Adjusted power to weight would be 8.06 for safety and I would be able to run any aero I want. The main reasons for wanting an N/A 20b is just cool factor and reliability. The cost for either way would end up in the same ballpark after factoring in the cost of making a custom turbo kit for the REW setup.

 

The ST classes are cool but I don't see a reason to run an RX-8 in them. You'd be better off with a 3rd gen RX-7 if you want to stick with Mazda.

 

If you do a turbo 2 rotor you get an extra credit in your adjusted hp/weight math. 3 rotor isn't eligible.

 

Back to "neg camber"... I went for an alignment today hoping to get rid of significant degrees of caster in order to get more camber. Nothing. Minimum caster was 5.8 on the left and 6.0 on the right -> No more neg camber for me (-2.1 it is).

Suggestions?

 

Go lower. I can get -3.0 everywhere.

 

TTA/TT3 here

 

How did you get "up there" to TTA, slvrstreak?

 

I could get that much front camber when my car was in the Stock class on factory springs.

A. Find a properly calibrated alignment rack operated by a skilled technician

and/or

B. Find someone who knows what they're doing to go through your suspension

 

It might take both (A) and (B)

 

It wouldn't be the first time I saw someone get the caster and camber bolts themselves or the direction to adjust them backwards on an RX8

 

Ah! Well, at least that wasn't the problem. I was underneath the car with the technician; we turned the bolts 360 degrees a few times, etc. Ended up putting it back the way it was based on what the machine measurements were.

Not that I'm an expert but I think I would have caught something like that.

 

If that was the actual min then I'd expect the max to be around 9 - 10 deg, which I' e never seen or heard of from any RX8

My min is about 4 deg, it has always been around that number (will vary slightly by suspension rake setting) since I bought the car at the dealership in 2005 which covers living in various different states and having been on more different alignment racks than I have fingers and toes counted all together

 

Did they swing the wheels left & right each time after you turned the caster adjustment bolts?

Oh and you should try Sal's for your alignment next time (290 & Fairbanks N. Houston roughly) - $21X for a lifetime alignment, even if its a racecar and you want it adjusted before every event.

 

We did it a couple of times but not every time. I like the idea of lifetime alignment!