EProdRx7

I was thinking about trying to get the FD's classified in EP as a non turbo. Are the brakes bigger on the 3rd gen over the 2nd? Any other hurdles you guys might be able think of?

cpa7man

iTrader: (2)

That sounds great. What is the process to get a car classed by the SCCA? I have been interested in racing an first gen E-prod car. The 3rd gen handles so much better, it would be very competitive. I believe the brakes are larger than the 2nd gen but I know very little about that gen rx-7.

EProdRx7

Well we need to get a bunch of specs together to submit to SCCA for consideration. I'll see if I can get answers to what info is needed and post latter.

maxpesce

The rotors may be slightly larger Dia. but are the same thickness. The fd front caliper is different than, but uses the same pads as the fc 4 piston caliper.

EProdRx7

Info I need to get this done. Help me out here guys

Wheelbase:
Track (F/R):
Wet Curb Weight:
Windshield Slope Angle:
Rear Window Slope Angle:
STOCK:
SAE Max Horsepower: @ RPM Max
Torque: @ RPM
Rev-Limit Speed: RPM
Rev-Limit Method:
Fuel Tank/Cell Capacity: US Gal.
Engine Location (frt, mid, rear):
Number of Cylinders:
Displacement (cc):
Compression Ratio (max):
Throttle Body Bore Dia.
Gear Ratios:
1st:
2nd:
3rd:
4th:
5th:
Differential Type:
Axle Ratio:
Ring Gear Outside Diameter:
Rotor Diameter (max):
Front:
Rear:
Rotor Thickness (max):
Front:
Rear:
Stock wheels and tires
Tire Size:
Front:
Rear:

Wheel Diameter & Material:
Front:
Rear:

Wheel Width:
Front:
Rear:

reza

Here you go...

1993 Mazda RX-7 Specifications (North American Version)

General Base R1 Touring
Wheelbase in.(mm) 95.5 (2425) 95.5 (2425) 95.5 (2425)
Track, Front, in.(mm) 57.5 (1460) 57.5 (1460) 57.5 (1460)
Track, Rear, in.(mm) 57.5 (1460) 57.5 (1460) 57.5 (1460)
Overall Length, in.(mm) 168.5 (4280) 168.5 (4280) 168.5 (4280)
Width, in.(mm) 68.9 (1750) 68.9 (1750) 68.9 (1750)
Height, in.(mm) 48.8 (1230) 48.8 (1230) 48.8 (1230)
Minimum ground clearance, Laden, in.(mm) 4.5 (115) 4.5 (115) 4.5 (115)
Turning circle, curb to curb, ft (m) 35.4 (10.8) 35.4 (10.8) 35.4 (10.8)
Curb Weight, Two Seater, lb (kg) MT 2789 (1265) 2800 (1270) 2862 (1298)
AT 2857 (1296) N/A 2923 (1326)
Weight Distribution, f/r % 50/50 50/50 50/50
Fuel tank capacity, US.gal. (litres) 20 (76) 20 (76) 20 (76)


Performance Maximum Speed, mph (km/h) 158 (252)
Acceleration, 0-60 mph, sec. 4.9
Standing 1/4 mile 13.5

Fuel Consumption, miles/gallon (EPA) MT AT
City 17 18
Highway 25 24
Combined 23.5 23.4



Engine Type Mazda Wankel Rotary, Longitudinal, Front "Midships" (13B-REW)
Number or rotors 2 in line
Generating radius, R, in. (mm) 4.1 (105)
Eccentricity, e, in. (mm) 0.59 (15)
K factor (R/e) 7.0
Width of trochoid chamber, b, in. (cc) 3.1 (80)
Single chamber capacity, cu in. (cc) 40.0 (654.0)
Total cubic capacity, cu in. (cc) 80.0 (1308.0)
Compression ratio 9.0:1
Maximum power, SAE net, bhp 255
@rpm 6500
Maximum torque, SAE net, lb-ft 217
@rpm 5000
Intake port position 2 per chamber, in side housings

Intake port timing
primary port opens, deg ATDC 45
closes, deg ABDC 50
secondary port opens, deg ATDC 32
closes, deg ABDC 50
Exhaust port position 1 per chamber, in trochoid housing (periphrey port)
opens, deg BBDC 75
closes, deg STDC 48
induction system 4-port, dynamic effect induction
Fuel system Digitally controled EGI-HS fuel injection with twin injectors per chamber.
Bosch L-Jetronic based Speed density system.

Turbocharging Sequential twin-turbochargers, with electronic boost control
(Twin Hitachi HT12 turbos w/51mm turbine & 57mm compressor)
Turbine diameter, in. (mm) 2.0 (51)
A/R, low-speed passage 0.6 (Pry)
A/R, low- and high-speed passages 0.6 (Sec)
Compressor daimeter, in. (mm) 2.2 (57)
Maximum boost, in. (mm) Hg 22.4 (570)
Intercooler air to air, in the nose of the car
Ignition system Electronically controled with triple coils, two spark plugs per rotor chamber, pieeezoelectric knock-sensor
Lubrication system Force-feed. Direct oil injection to trochoid chambers for lubrication and sealing. Oilcooler (twin for "R" model).
Lubricant capacity, US gal. (litres) single 1.3 (4.9) twin 1.4 (5.4)
Cooling system Rotor housings water cooled; twin electric fans (with an auxiliary electric suction fan with airconditioning instalation); aluminium radiator. Rotors oil-cooled.
Coolant capacity, US gal. (litres) 2.3 (8.8)


Drive Train Manual Transmition
Transmission type Type R152, 5-speed manual
Clutch type Single dry plate, diaphragm spring, hydraulically operated with pull-type mechanism
Clutch diameter, outer x inner, in. (mm) 9.3 x 6.3 (236 x 160)
Gearbox type All synchromesh, with double-cone synchronizers on 2nd and 3rd gears (R type)
Gear ratios
1st 3.483:1
2nd 2.015:1
3rd 1.391:1
4th 1.000:1
5th 0.719:1
rev 3.288:1
Final drive type Hypoid
Ratio 4.100:1
Limited-slip differemtial Torsen-type standard

Automatic Transmission
Transmission R4A-EL electronically-controled,4-speed automatic
Type Torque converter and planetary-gear automatic
Torque converter Type-GDD with lockup clutch operatinr in 3rd and 4th
stall rpm 3,000
stall ratio 2.1:1
Gear ratios
1st 3.027:1
2nd 1.619:1
3rd 1.000:1
4th 0.694:1
rev 2.272:1
Final drive ratio 3.909:1

Propeller shaft Tube in tube construction
Final drive shafts Equal length haif shafts with constant-velocity joints
Power plant frame Power train and final drive unit are unitized by Power Plant Frame (PPF)

Chassis and Body Layout Front engine Rear wheel drive
Suspension, front Independent, double-wishbones by unequal length upper and lower arms, coil springs, telescopic dampers, anti-roll bar
Suspention, rear Independent, double-wishbones by upper A-arms, lower transverse I-arms, transverse toe-control links, trailing links, coil springs, telescopic dampers. anti-roll bar
Steering type Rack and pinion, engine rpm-sensing, variable hydraulic assistance
Ratio 16.6:1
Turns lock to lock 2.9
Brakes
Front Ventilated discs with 4-piston, floating calipers
Disc diameter/thickness,in.(mm) 11.6 (294)/.5 (11.6)
Pad area, sg in.(cm2) 14 (90)
Rear Ventilated discs with single-piston
Disc diameter/thickness,in.(mm) 11.6 (294)/.5 (11.6)
Pad area, sg in.(cm2) 10 (64)
Vacuum servo 8" + 8" Mastervac vacuum servo
ABS 4-sensor, 3-channel anti-lock brake system standard
Wheels Squeeze-cast aluminium wheels, 16 x 8JJ
Tires 225/50VR16 (Base) 225/50ZR16 (R1) 225/50VR16 (Touring)
Body "Space-Monocoque" steel, welded body with aluminium hood

US Model variations as apposed to Japanese domestic release.
(Taken from : 3rd Generation RX-7 FAQ, Version 1.0, 7 Aug 1996)
http://www.k-rad.com/3genfaq

Left hand drive.
Air conditioning is standard.
Alarm is standard.

Mechanical Standard Features
- 2-rotor inline rotary engine with sequential twin turbochargers,
air-to-air intercooler, and electronic fuel injection
- Engine oil cooler
- 5-speed manual transmission with overdrive
- Power Plant Frame (PPF)
- Torsen torque-sensing limited-slip differential
- Fully independent double-wishbone suspension with rear shock-tower support brace
- Rack-and-pinion steering with engine-rpm-sensing variable power assist
- Power-assisted 4-wheel ventilated disc brakes with aluminum 4-piston front
calipers and ducted backing plates
- Anti-lock Brake System (ABS)

Exterior Standard Features
- 16-inch aluminum alloy wheels
- Dual aerodynamic body-color power mirrors
- Tinted glass
- Retractable halogen headlights
- Lightweight aluminum hood

Interior Standard Features
- Highback bucket seats with seatback recliners
- Sport cloth upholstery
- Dual storage compartments behind seats
- Power windows and door locks
- Remote liftgate and fuel door releases
- 9000-rpm tachometer with 8000-rpm* redline
- 180-mph speedometer
- Gauges for oil pressure and engine coolant temperature
- Leather-wrapped steering wheel, handbrake grip, and transmission shift
****
- Cruise-control with steering-wheel-mounted controls (n/a R-1)
- Driver's side air bag Supplemental Restraint System (SRS)
- Drilled aluminum clutch and brake pedals (manual trans. only)
- Anti-theft alarm system
- Heater/defroster with 4-speed blower and side-window demisters
- Air Conditioning
- AM/FM/cassette stereo sound with five speakers and automatic power antenna

* 7000 rpm redline with automatic transmission

Base models

Comes with all equipment above, and can be ordered with a 4-speed
electronically controlled automatic transmission with overdrive. Can
also be ordered with leather seating surfaces.

Black Black Tan Red
Cloth Leather Leather Leather

Vintage Red X X X -
Brilliant Black X - X X
Silver Stone Metallic X X - X
Montego Blue Metallic X - X -

Not available in Competition Yellow Mica.

Touring models

This is an option package consisting of:
- Leather seating surfaces
- Bose Acoustic Wave stereo music system with compact disc player, five
speakers and automatic power antenna
- High-reflex paint
- Sliding sunroof with tilt-up ventilation feature
- Halogen fog lights
- Rear window wiper/washer
- Upgraded sound insulation
- Removeable rear cargo area cover

Touring models can be ordered with a 4-speed electronically controlled
automatic transmission with overdrive.

Black Black Tan Red
Cloth Leather Leather Leather

Vintage Red X X X -
Brilliant Black X - X X
Silver Stone Metallic X X - X
Montego Blue Metallic X - X -

Not available in Competition Yellow Mica.

For the 1994 year model, the touring package was renamed "PEG" for popular
equipment group.

"R" models

The "R" model is the performance model, and does not have cruise control.
The "R" model's option package consists of:

- Rear spoiler and front air dam
- Dual engine oil coolers
- Dedicated front brake air ducts
- Special suspension tuning
- Front shock-tower support brace
- Z-rated high-performance steel-belted radial tires

Black Black Tan Red
Cloth Leather Leather Leather

Vintage Red X - - -
Brilliant Black X - - -
Competition Yellow Mica X - - -

Not available in Silver Stone Metallic or Montego Blue Metallic.

RX-7s sold in the United States ~ 1995.

Model 1992 1993 1994 1995
----------------------------------------------
Base 763 1245 392 153
R-model 1107 1015 275 182
Touring 2991 2734 1010 648
P.E.G. 0 53 533 416

* P.E.G. = "Popular Equipment Group" (Used to be called "Touring")

What can I tell from looking at my VIN?

A typical RX-7 VIN looks like: JM1FD3311P0200001
In order, the fields are as follows:

"JM1" "World Manufacturer Identifier" for Mazda
"FD" RX-7 series
"33" body style ("33" = coupe)
"1" "Misc ID field" (1993: "1" = US, "2" = Canada.)
(1994: "3" = manual seat belts, 2 airbags)
(1995: "3" = manual seat belts, 2 airbags)
"1" "Check Digit" (used to verify that a VIN is not bogus)
(calculated for each car)
"P" year model code (1993 = "P")
(1994 = "R")
(1995 = "S")
(Q was not used)
"0" assembly plant code ("0" = Hiroshima)
"200001" serial number (1993: started with 200001)
(1994: started with 300001)
(1995: started with 400001)

rear suspension details:

http://homepages.ihug.com.au/~markinoz/rsusfd.jpg



Front Susp. details:

http://homepages.ihug.com.au/~markinoz/fsusfd.jpg


Full engine layout:

http://homepages.ihug.com.au/~markinoz/13bexp.jpg


Full car layout:

http://homepages.ihug.com.au/~markinoz/fdexp.jpg

Bern

John,
I think the turbo issue will be your biggest hurdle, as you know the 3rd gen was never offered in anything but a turbo. The motor issue and weight, I think, will be the most difficult to reconcile.

Good luck, as this would be cool!

A good couple of my favorite words from the SCCA

"to much competition potential"

They just gave everyone breaks in EP, but the FCs and 99 Miatas. The thing the SCCA didn't consider was the few super fast 1st gens in EP. In our division, we have one that is beating and matching us and Dave L. step for step... and now he got a break! It will be interesting. Last thing SCCA needs is another FAST RX in EP!

BTW, I saw the other production discussion


-Bern

Hamza734

Good info

EProdRx7

Thanks and you are right about the turbo. I have some ideas for getting around that though. Beans to beans this car really is just an updated better looking second gen. The mods already allowed would make the chassis almost identical, brakes are the same and although I think the power potential is slightly higher for the 13BRE a small weight bump should even it out.
BTW not the first time I've heard the "not another RX7" quote. Fact is that it IS a great car and very popular. If pacers were as popular then we would have a bunch of fast ones around.

Hamza734

The power potential of a stock port 13B-REW is greated on account of its larger ports. E-Prod aside, I think an FD with a Peripheral Ported motor would make a killer track car. Fully gutted the chassis WILL be lighter then an FD and susoension is true race car spec. There's a gentleman in California who runs a P-ported FD in NASA events. You can see his car here:

http://images.realride.com/cgi-bin/i...er%29&x=10&y=4

Hakan Uras

Hamza734

The power potential of a stock port 13B-REW is greated on account of its larger ports. E-Prod aside, I think an FD with a Peripheral Ported motor would make a killer track car. Fully gutted the chassis WILL be lighter then an FD and the suspension (front and rear) is true race car spec. There's a gentleman in California who runs a P-ported FD in NASA events. You can see his car here:

http://images.realride.com/cgi-bin/i...er%29&x=10&y=4

Hakan Uras

Hamza734

The power potential of a stock port 13B-REW is greated on account of its larger ports. E-Prod aside, I think an FD with a Peripheral Ported motor would make a killer track car. Fully gutted the chassis WILL be lighter then an FD and the suspension (front and rear) is true race car spec. There's a gentleman in California who runs a P-ported FD in NASA events. You can see his car here:

http://images.realride.com/cgi-bin/i...er%29&x=10&y=4

Hakan Uras

Bern

John, I think that beans-to-beans the FD is actually a larger, more powerful, and faster, hard-top Miata, more than an FC. The FD uses the power-plant-frame back-bone chassis system, as does the Miata. The chassis on the FD is vastly superior in several areas to the FC.

About your popularity idea... if this was the case, you would open the pandoras box to have to let in the 300ZX turbo, Supra Turbo, and a few other very popular late model imports. Nothing wrong with that, but I just don't see SCCA doing it in EP. But this does open the discusion about getting DP, CP, BP, AP back!

A reality check here is what just happened in EP. The FC and 99 Miatas just got penalized (reverse) for being too fast. This although, the FC hasn't even won a national championship, or even finished top three at the runoffs yet! I know that you had inside info and input on this, but this does not bode well for the SCCA letting an even MORE superior RX into the class.

Don't get me wrong, I love the FD, and wish it could be let into EP; I'm sure we would build one asap! I'd really love the chance to race the FD in EP, but I'm not holding my breath. We have put some thought into this idea though. Anyway I do support your efforts 100%!

btw, there a few fast 1st gens that are going to benefit highly from the new EP rules. In our division there is at least one FB that is running head-to-head with us and Dave L., and even winning both cars straight up, a few times! Now they just gave him a nice weight break! sigh !!!!


On Evans car, he used to race the FD in SCCA regional ITE, with his 13B-PP, but he has now stepped up to GT2 with the FD. It's a very nice car, but it being a chassis and not a full tube car, is going to make it an up hill battle for him.

-Bern

EProdRx7

Bern,
I see the car getting classed without the turbo and the standard "street port" as we already do in EP. Problem with those other cars mentioned is that they are too big motor wise to fit in EP. The rule of thumb is 2.5l is the max. The 13B is a known entity and with what we can do to the chassis under the existing rules makes them very even regardless of what car you choose.
You are very right about the FB cars and I fought very hard to not let that happen. Just think the Elva got weight off also! Should be an interesting runoffs, that is if I don't sell the car first...

EProdRx7

Is this right?
Brakes
Front Ventilated discs with 4-piston, floating calipers
Disc diameter/thickness,in.(mm) 11.6 (294)/.5 (11.6)

maxpesce

IIRC the front rotor min thickness is 21mm - not 11.6 (11.6 sounds like a solid rotor not vented)

christaylor

John - how many Elva's are floating around these days? Did Mark and Ed Brannon sell all theirs?

Let me know when you need another letter-writer. Me and my 13 years of membership are always ready and willing.