300WHP, 1:41.5 @ Sonoma Raceway


Quick refresher:
300WHP 1950lbs Dry Weight
Porsche Carbon Fiber Wing
Autokonextion Widebody Carbon/Fiberglass kit
Autokonextion Carbon fiber fastback roof,
Carbon Fiber hood Hood
TC Design Chrome Moly Cage,
Low hours Rebello Engine, Ported head, SUB, Custom Cams, Supertech Heavy Double Valve Springs,Supertech pistons with Forged rods, Boundry pump (full)Skunk 2 intake. Rotrex C30-74 Super Charger. True 300WHP (E85)
MS Labs MS3 BasicID1300 CC stainless injectors.
6 Speed Trans with TDR Shifter
AST Double Adjustable Shocks 1000/550 Springs,
Ron Davis Radiator with oil cooler.
Racing Beat 1.25" Hollow bar with custom supports
OS Gixen Diff 4:10 gears,
Aim Pista Dash
2 sets 15x10 wheels with 245/580/15 Tires
Stoptech STR42 with 11.75" rotor front
Miata Sport Rear with 10.90" rotors
1" 929 Master cylinder, NB Front Subframe, (improved geometry)
Spherical control arm bushings on lower arms and rear upper knuckles,
Delrin control arm bushings on upper arms.
Fuel Cell etc
Complete build in Race Prep Section: https://www.miataturbo.net/race-prep...d-miata-47756/

Sonoma Tim 1:41.5 Lap
Against Porsche Race car
Dean Sonoma 1:41.6 Lap:

 

Don't forget a price

 

TTT

 

I've got firsthand experience driving this car, and it is spectacular! I've driven this car to a mid 1:41 at Sonoma almost 5 years ago, and it's even faster now! It reminds me of a "mini cup car" - super well balanced, very accessible limits, feels solid like it is chiseled from a block of granite. TC built the platform and then Tom Hogan continued to develop it with help from both TC and Tim Barber. He put equal attention into making it fast, reliable and well balanced. The aero is functional at both front and rear and well-balanced

Having built an LS1-miata myself, I can say that this lightweight approach rather than the brute-force approach of a V8 swap is the way to go. It's hard to imagine getting more car than this for the asking price.

Dean

 

On an unrelated note how did you get that valve cover paint looking so nice. That car looks like a ton of fun.

Cheers,Nic

 

Just commenting to bump this rocket, ask a question and display my ignorance. Question - how much boost does it make? Ignorance (chance to learn something) why a blowoff on a supercharged car?

 

Because the engine does not go down to 0 rpm when you lift off.
The butterfly slams shut when you pull your foot off the gas, but since the engine is still spinning, the mechanically attached supercharger keeps producing boost.
Having nowhere to go, the boost creates a serious spike in the intercooler and all associated pre TB plumbing...
It also places undue and uncalled for stress on the charger blades/vanes/turbine.
A BOV politely shows the door to the redheaded stepchild, that's all.

Another way to deal with this very issue is incorporating a second TB, before the charger.
Since the pre-charger TB slams shut, too, when you lift, the charger is cleverly deprived of air to pressurize...

And, I guess this is enough off-topic chit chat on a for sale thread.

 

Agreed about off topic but just to say thanks. I took another look at the engine bay pic and realized that the rotex has the tb south of the blower. On my MP62 it's north = no blowoff.

Now back to the sale; If I had the money and the *****, I'd buy this thing.

 

TTT

 

pm'd

 

TTT

 

Emilio do you replace valve seats with +1 and/or +2mm bigger valves?

thx

 

and do you have any finalized pics of intercooler, oil cooler and radiator mounted?

thx

Wombat