Car #: 79
Year : 1990 Posts: 695
Seems that the Spec Miata community is always talking about ways to improve the class to make it fair and keep the prices down. The Mx-5 cup has adopted some great rules. Sealed motors, a spec tire and some really great scrutinizers. Following the last race at Road America, Mazda impounded and took the top three cars to a Mazda training facility for inspection. The inspections are complete and I am proud to say that all three cars passed the inspections. All three cars were from different teams thus showing us a great cross section of the field. below I have posted the E-mail that was sent out to all competitors. The report is extensive. I wonder if these type of inspections could be done at the Spec Miata level?
Here is a quote from the original letter that was given out at the track explaining why the cars were being taken
"The key to any spec racing series is a level playing field and continuously working hard to make sure that every competitor, no matter the budget, is able to compete for race wins and championships. Everyone at Mazda believes, and has been adamant, that this philosophy needs to be a pillar of all of our racing programs...especially a class like Spec Miata on the Club Racing level and the MX-5 Cup on the Pro Racing level."
I congratulate Mazda and SCCA for going the extra mile to make sure that the playing field is equal and I congratulate all three teams for keeping the standards high and racing legal cars.
MX-5 Cup Participant Memo
To: SCCA Pro Racing MX-5 Cup Participants Jim Jess, MX-5 Technical Manager Date: August 20, 2009 Regarding: MX-5 Cup Road America Tech Inspection Report MX-5 Road America Tech Inspection After an extensive, in depth examination of each impounded car, all cars were found to be compliant. The following is a list of some the items checked, with a brief description of how they were inspected and how they were determined to be compliant. The inspection team consisted of Jim Jess, MX-5 Cup Technical Manager, Tim Buck, Mazdaspeed Representative, Nathan Edmonds, Mazda Technical Services and Jim Brown, MX-5 Cup Series Manager.
Engine Coolant Temp (ECT) • Verified ECT matched ambient temp after cold soak • Started engine and verified proper ECT response on warm-up Ambient Air Temp (AAT) • Verified AAT matched actual ambient and stayed steady with engine warmed up Intake Air Temp (IAT) • Verified IAT matched ambient after cold soak, stayed steady during engine warm up and increased on hot soak Air/Fuel sensor operation • Monitored actual AFR input while commanding injector pulse width higher and lower, verified AFR input indicated richer with higher pulse width and leaner with lower pulse width Operation of Climate control/radio switches for effect on engine management system • Monitored inputs for AFR, ECT, IAT, AAT, Spark Advance, Cam Timing, and Charge Voltage and verified no change in inputs while operating climate control, radio, and other dash switches. Exhaust Gas Recirculation operation • Commanded EGR stepper open at idle and verified vehicle ran rough/stalled indicating EGR flow is present. MX-5 Cup Participant Memo Page 2 of 3 Variable Cam Timing (VCT) operation • Verified cam timing baseline at idle • Commanded oil control valve duty cycle at idle, verified cam timing responded and engine stalled at idle with increased duty cycle PCM controlled charging system operation • Commanded charging system field current off, verified charge voltage dropped • Verified actual charge voltage matched PCM desired voltage Intake Manifold Tuning Valve (IMTV) operation • Commanded IMTV open at idle, verified valve opened and idle quality changed Fuel Pump relay operation • Commanded fuel pump relay off using IDS, verified vehicle ran lean and stalled with fuel pump relay off Calibration of both SCCA PCM and OE PCM • Checked current calibration and verified calibration verification number matched in OE PCM • Verified no change in calibration of SCCA supplied PCM • Performed ECT, IAT, AAT, A/F sensor operation, EGR, VCT, Charging System, fuel pump relay and IMTV checks with both SCCA supplied PCM and competitors OE PCM Resistance of power and ground circuit to fuel pump • Checked resistance of power circuit from fuel pump relay to the fuel pump and fuel pump ground circuit using digital multi meter, verified resistance less than 1 ohm (normal, OE resistance) on each Fuel Pressure • Checked actual fuel pressure using gauge, verified fuel pressure held without bleeding down and increased to spec within 1 second of releasing pressure Fuel Pump/Regulator/Sender Assembly • Visually inspected fuel pressure regulator • Visually inspected fuel pump Suspension Pickup points • Measured upper and lower front suspension pickup points • Measured all rear suspension pickup points MX-5 Cup Participant Memo Page 3 of 3 Differential assembly inspection • Checked for OEM LSD assembly • Checked LSD spring pressure and wire diameter Note: Differential components of car #’s 28 and 84 were found to be micro polished. The #89 car was OE. Visual inspection for additional PCM controllers • Verified that any non-OE switches did not perform an unapproved function • Verified integrity of OE wiring harness MAF sensor • Visually inspected hot wire, connector, harness and sensor mounting Inspected for: Bump rubbers Sway bar modifications Spring rates Suspension bushing material Verified engine serial numbers, engine seal numbers and seal integrity.
Car #: 79
Year : 1990 Posts: 695
Rick After the race at Autobahn they did take a tire. The Goodrich guys did burn a sample of the tire and checked the off gas for anything that did not belong. All tires that were checked were found clear.