Phatmiata
01-06-2015, 10:37 AM
I found this at http://grassrootsmotorsports.com/articles/boneyard-brigade/
They cover several brand of cars, BMW, Honda, Ford, etc
Below is Mazda
Mazda
The first-generation RX-7 came in a variety of models during its six-year lifespan. This makes junkyard shopping a pleasure because many hop-up parts are available.
The 1981-'85 cars had the best factory ignition systems. However, the '80 car is the easiest to convert to an aftermarket electronic ignition because none of its electronics are in the distributor, as was the case with the later cars.
The transmission changed in 1981, when the shifter was brought closer to the driver. This made driving more comfortable. The later trannies will fit the earlier cars, but the tunnel must be modified.
Some later GSL-SE models feature a 4.08 limited slip rear end with giant brakes. This is a good setup, but it's heavy. A better choice is the GSL rear end with limited slip.
All early RX-7 steering wheels are interchangeable. Later cars had nicer wheels. Later cars also had nicer seats; these bolt right into the early cars.
The RX-7 GSL had a rear anti-roll bar that can be fitted to any of the other cars. The later model cars were heavier and had more options, so they had slightly stiffer springs. Unfortunately, these springs will adversely affect ride height unless they are modified.
The 1983-'85 cars have a bigger radiator than the earlier cars, and it will bolt right in. The 1979-'82 cars have an oil cooler which can be used with a 1983-'85 radiator for the ultimate cooling setup.
A few boneyard swaps are also possible with the second-generation RX-7 (1986-'91). If you have a base-model car, look to the GXL and turbo models for lots of neat bits: five-lug hubs, four-piston front calipers and vented rear disc brakes. The turbo models also feature a beefier transmission and rear end. The Miata has been with us for about 10 years, so it too can benefit from some creative engineering. To help increase the stopping power of the early, 1.6-liter cars, the larger front rotors from 1994-up cars can be adapted with the use of the late-model caliper brackets (see www.teleport.com/~miq/miata/brake/bigbrake.htm for more info).
These early 1.6-liter Miatas can also replace their 205cc injectors with 230cc units from 1.8-liter cars. Speaking of increasing the power of the 1.6-liter Miata, the air-flow meter from a 1986-'88 RX-7 is larger and an easy replacement.
The second-generation RX-7 can donate some other parts to a Miata. The 1986-'91 rear end from the non-turbo models can be a low-buck replacement for a 1994-up Miata rear, and the 1986-'88 RX-7 clutch-type limited-slip differential can fit a 1994-up Miata if you don't mind doing some grinding to the interior of the housing.
If your Miata is running a little warm, some simple tips may help. First, the 1.8-liter cars came with a simple, yet effective radiator support cover that helps direct more air through the radiator. It will bolt onto any 1.6-liter car. Also, the three-row radiator from any automatic-equipped Miata will bolt into any five-speed car, replacing the original two-row piece.
To shed some weight from the car (and if, for whatever reason, you're not too concerned with side-impact protection), the pre-1993 doors are lighter because they feature one less brace. Swapping doors on a Miata is a bolt-on deal.
To help increase the engine's clamping power, the 1994-up 1.8-liter flywheel and clutch assembly is a perfect fit in an earlier 1.6-liter car and only creates a slight, one-pound penalty (19 pounds vs. 18). The limited 1994 R model seems to have the most desirable anti-roll bars that bolt into any late car. This front bar can be installed in early cars if a new end-link hole is drilled about 1/2- to 3/4-inches closer to the bar bend. The 1993 Limited Edition and all 1994-up cars feature a more desirable, 1mm smaller rear bar. If you grab the bushings, it can be adapted to fit any year Miata.
The Mazda Protege, which came with the same engine as the Miata, features a resonance box in its intake plumbing between the air cleaner and throttle body. Its purpose is to use the Hemholtz resonance theory to increase torque in the midrange; check 1990-'94 Proteges for one.
Different gear sets will fit into a Miata case, and currently 3.909:1, 4.10:1, 4.30:1 and 4.44:1 ratios are available from the factory. Check out the front axle of 1987-'88 four-wheel-drive Mazda trucks for the 4.44:1 gears, while the 3.909 ratio can be found in automatic-equipped 1984-'85 RX-7 GSL-SEs.
While not a Miata-specific swap, all Miatas came with a light- weight gel cell battery. If it has enough juice to get your car going, then there's no reason why it can replace a heavy battery in any other car. Note, however, that the nature of their design means it can take up to two days to recharge a dead gel cell battery.
The Miata, non-turbo RX-7, rear-drive 626 and B2000/2200 trucks all use very similar transmissions. While they are different with respect to model-specific cases, bellhousing bolt patterns and tailshaft extensions, the guts are basically the same. In other words, the gear sets from one tranny can be swapped into another. To change individual gears, you'll need the assistance of a transmission shop, as bearings need to be changed and gears need to be pressed on and off the layshafts.
The 1983-up trannies are reported to be better-built than the earlier units, while the 626 offers the tightest spacing of third through fifth gears.
For the record, here are the gear ratios featured over the years: 1986-'91 RX-7 non-turbo: (1) 3.475, (2) 2.002, (3) 1.366, (4) 1.000, (5) 0.697 (1986 only), (5) 0.711 (1987-'91). Miata: (1) 3.136, (2) 1.888, (3) 1.330, (4) 1.000, (5) 0.814. 1979-'83 RX-7: (1) 3.674, (2) 2.217, (3) 1.432, (4) 1.000, (5) 0.825. 1984-'85 RX-7 and B2000/B2200 truck: (1) 3.662, (2) 2.186, (3) 1.419, (4) 1.000, (5) 0.758 (all 1984 RX-7 and '85 12A), (5) 0.711 (1985 GSL-SE), (5) 0.858 (truck). RWD 626: (1) 3.214, (2) 1.818, (3) 1.296, (4) 1.000, (5) 0.858.
To learn how to swap a 1.8-liter Miata engine into an early car, check out our Jan./Feb. 1997 issue. Used 1.8-liter engines are out there for under $1000. For some other Miata tricks, and for some more info on the swaps discussed here, take a look at Randy Stocker's Web page.
They cover several brand of cars, BMW, Honda, Ford, etc
Below is Mazda
Mazda
The first-generation RX-7 came in a variety of models during its six-year lifespan. This makes junkyard shopping a pleasure because many hop-up parts are available.
The 1981-'85 cars had the best factory ignition systems. However, the '80 car is the easiest to convert to an aftermarket electronic ignition because none of its electronics are in the distributor, as was the case with the later cars.
The transmission changed in 1981, when the shifter was brought closer to the driver. This made driving more comfortable. The later trannies will fit the earlier cars, but the tunnel must be modified.
Some later GSL-SE models feature a 4.08 limited slip rear end with giant brakes. This is a good setup, but it's heavy. A better choice is the GSL rear end with limited slip.
All early RX-7 steering wheels are interchangeable. Later cars had nicer wheels. Later cars also had nicer seats; these bolt right into the early cars.
The RX-7 GSL had a rear anti-roll bar that can be fitted to any of the other cars. The later model cars were heavier and had more options, so they had slightly stiffer springs. Unfortunately, these springs will adversely affect ride height unless they are modified.
The 1983-'85 cars have a bigger radiator than the earlier cars, and it will bolt right in. The 1979-'82 cars have an oil cooler which can be used with a 1983-'85 radiator for the ultimate cooling setup.
A few boneyard swaps are also possible with the second-generation RX-7 (1986-'91). If you have a base-model car, look to the GXL and turbo models for lots of neat bits: five-lug hubs, four-piston front calipers and vented rear disc brakes. The turbo models also feature a beefier transmission and rear end. The Miata has been with us for about 10 years, so it too can benefit from some creative engineering. To help increase the stopping power of the early, 1.6-liter cars, the larger front rotors from 1994-up cars can be adapted with the use of the late-model caliper brackets (see www.teleport.com/~miq/miata/brake/bigbrake.htm for more info).
These early 1.6-liter Miatas can also replace their 205cc injectors with 230cc units from 1.8-liter cars. Speaking of increasing the power of the 1.6-liter Miata, the air-flow meter from a 1986-'88 RX-7 is larger and an easy replacement.
The second-generation RX-7 can donate some other parts to a Miata. The 1986-'91 rear end from the non-turbo models can be a low-buck replacement for a 1994-up Miata rear, and the 1986-'88 RX-7 clutch-type limited-slip differential can fit a 1994-up Miata if you don't mind doing some grinding to the interior of the housing.
If your Miata is running a little warm, some simple tips may help. First, the 1.8-liter cars came with a simple, yet effective radiator support cover that helps direct more air through the radiator. It will bolt onto any 1.6-liter car. Also, the three-row radiator from any automatic-equipped Miata will bolt into any five-speed car, replacing the original two-row piece.
To shed some weight from the car (and if, for whatever reason, you're not too concerned with side-impact protection), the pre-1993 doors are lighter because they feature one less brace. Swapping doors on a Miata is a bolt-on deal.
To help increase the engine's clamping power, the 1994-up 1.8-liter flywheel and clutch assembly is a perfect fit in an earlier 1.6-liter car and only creates a slight, one-pound penalty (19 pounds vs. 18). The limited 1994 R model seems to have the most desirable anti-roll bars that bolt into any late car. This front bar can be installed in early cars if a new end-link hole is drilled about 1/2- to 3/4-inches closer to the bar bend. The 1993 Limited Edition and all 1994-up cars feature a more desirable, 1mm smaller rear bar. If you grab the bushings, it can be adapted to fit any year Miata.
The Mazda Protege, which came with the same engine as the Miata, features a resonance box in its intake plumbing between the air cleaner and throttle body. Its purpose is to use the Hemholtz resonance theory to increase torque in the midrange; check 1990-'94 Proteges for one.
Different gear sets will fit into a Miata case, and currently 3.909:1, 4.10:1, 4.30:1 and 4.44:1 ratios are available from the factory. Check out the front axle of 1987-'88 four-wheel-drive Mazda trucks for the 4.44:1 gears, while the 3.909 ratio can be found in automatic-equipped 1984-'85 RX-7 GSL-SEs.
While not a Miata-specific swap, all Miatas came with a light- weight gel cell battery. If it has enough juice to get your car going, then there's no reason why it can replace a heavy battery in any other car. Note, however, that the nature of their design means it can take up to two days to recharge a dead gel cell battery.
The Miata, non-turbo RX-7, rear-drive 626 and B2000/2200 trucks all use very similar transmissions. While they are different with respect to model-specific cases, bellhousing bolt patterns and tailshaft extensions, the guts are basically the same. In other words, the gear sets from one tranny can be swapped into another. To change individual gears, you'll need the assistance of a transmission shop, as bearings need to be changed and gears need to be pressed on and off the layshafts.
The 1983-up trannies are reported to be better-built than the earlier units, while the 626 offers the tightest spacing of third through fifth gears.
For the record, here are the gear ratios featured over the years: 1986-'91 RX-7 non-turbo: (1) 3.475, (2) 2.002, (3) 1.366, (4) 1.000, (5) 0.697 (1986 only), (5) 0.711 (1987-'91). Miata: (1) 3.136, (2) 1.888, (3) 1.330, (4) 1.000, (5) 0.814. 1979-'83 RX-7: (1) 3.674, (2) 2.217, (3) 1.432, (4) 1.000, (5) 0.825. 1984-'85 RX-7 and B2000/B2200 truck: (1) 3.662, (2) 2.186, (3) 1.419, (4) 1.000, (5) 0.758 (all 1984 RX-7 and '85 12A), (5) 0.711 (1985 GSL-SE), (5) 0.858 (truck). RWD 626: (1) 3.214, (2) 1.818, (3) 1.296, (4) 1.000, (5) 0.858.
To learn how to swap a 1.8-liter Miata engine into an early car, check out our Jan./Feb. 1997 issue. Used 1.8-liter engines are out there for under $1000. For some other Miata tricks, and for some more info on the swaps discussed here, take a look at Randy Stocker's Web page.