 C900
Compatible Camshaft Specs |
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| Motor & year | Inlet Lift | opens | closes | dur | SAAB | Ex lift | open | close | dur | LSA | Overlap | SAAB |
| 8V Cams | (mm) | (BTDC) | (ABDC) | (deg) | Part # | (mm) | (BBDC) | (ATDC) | (deg) | (deg) | (deg) | Part # |
| B201 carb -81 | ?? | 10 | 54 | 244 | ?? | 46 | 18 | 244 | 108 | 28 | ||
| B201i & T(apc)-81 | ?? | 10 | 54 | 244 | ?? | 46 | 18 | 244 | 108 | 28 | ||
| B201T -82 | ?? | 12 | 40 | 232 | ?? | 62 | 2 | 244 | 112 | 14 | ||
| CatCams | ||||||||||||
| sport 1 | 11.35 | 38 | 74 | 292 | 11.35 | 74 | 38 | 292 | 108 | 76 | 6100008 | |
| rally 1 | 10.75 | 37 | 73 | 290 | 10.75 | 73 | 37 | 290 | 108 | 74 | 6100014 | |
| rally 2 | 10.75 | 31 | 79 | 290 | 10.75 | 79 | 31 | 290 | 114 | 62 | 6100015 | |
| rally 3 | 11.95 | 26 | 74 | 280 | 11.95 | 74 | 26 | 280 | 114 | 52 | 6100013 | |
| rally 4 | 13.20 | 32 | 64 | 276 | 13.20 | 64 | 32 | 276 | 106 | 64 | 6100016 | |
| rally 5 | 13.60 | 47 | 79 | 306 | 13.60 | 79 | 47 | 306 | 106 | 94 | 6100012 | |
| MSS | ||||||||||||
| SD | ||||||||||||
| 16V Cams | Inlet Lift | opens | closes | dur | SAAB | Ex lift | open | close | dur | LSA | Overlap | SAAB |
| (mm) | (BTDC) | (ABDC) | (deg) | Part # | (mm) | (BBDC) | (ATDC) | (deg) | (deg) | (deg) | Part # | |
| B202t -1985 | 8.65/6.65 | 10 | 56 | 246 | 7509201 | 8.65 | 56 | 16 | 252 | 112 | 26 | 7509219 |
| B202t cat -86 | 8.65/6.65 | 10 | 56 | 246 | 7509201 | 8.65 | 56 | 16 | 252 | 112 | 26 | 7509219 |
| B202t 1986- | 8.65 | 16 | 56 | 252 | 7560808 | 8.65 | 61 | 13 | 254 | 112 | 29 | 7560964 |
| B202t cat 87- | 8.65 | 16 | 56 | 252 | 7560808 | 8.65 | 61 | 13 | 254 | 112 | 29 | 7560964 |
| B202i 1986- | 8.65 | 16 | 44 | 240 | 7561467 | 8.65 | 61 | 13 | 254 | 109 | 29 | 7560964 |
| B212i 1991- | 8.65 | 16 | 44 | 240 | 756095? | 8.65 | 61 | 13 | 254 | 109 | 29 | 7560964 |
| B234i 90-93 | 8.65 | 13 | 53 | 246 | 9116690 | 8.65 | 50 | 16 | 246 | 109 | 29 | 9116708 |
| B234t 91-93 | 8.65 | 13 | 53 | 246 | 9116690 | 8.65 | 50 | 16 | 246 | 109 | 29 | 9116708 |
| SD Red series | 9.37 | 22 | 61 | 263 | 8.65 | 56 | 16 | 252 | 110 | 38 | ||
| Crower | ?? | ?? | ?? | ?? | ?? | ?? | ?? | ?? | ?? | |||
| Catcams | ||||||||||||
| Hydraulic tappet | ||||||||||||
| sport 1 | 9.55 | 12 | 56 | 248 | 9.55 | 56 | 12 | 248 | 112 | 24 | 6100201 | |
| sport 2 | 9.75 | 23 | 67 | 270 | 9.75 | 67 | 23 | 270 | 112 | 46 | 6100200 | |
| rally | 10.95 | 28 | 64 | 272 | 10.9 | 58 | 22 | 260 | 108 | 50 | 6100202 | |
| Mechanic tappet | ||||||||||||
| hi/po 1 | 11 | 35 | 65 | 280 | 11 | 65 | 35 | 280 | 105 | 70 | 6100203 | |
| hi/po 2 NA | 10 | 34 | 64 | 278 | 10 | 64 | 34 | 278 | 105 | 68 | 6100204 | |
| hi/po 3 TURBO | 11.3 | 18 | 58 | 256 | 11.3 | 58 | 18 | 256 | 110 | 36 | 6100205 | |
| hi/po 4 RACE | 12.5 | 39 | 69 | 288 | 11.95 | 65 | 35 | 280 | 105 | 74 | 6100206 | |
| B234i 94+ | 13 | 53 | 246 | 48 | 18 | 246 | 108 | 31 | ||||
| B234t 94+ | 14 | 46 | 240 | 44 | 16 | 240 | 105 | 30 | ||||
BTDC - Before Top Dead Center
ATDC - After Top Dead Center
BBDC - Before Bottom Dead Center
ABDC - After Bottom Dead Center
Engine Code ex. B202i cat
B = Gasoline (Bransle in Swedish)
20 = displacement in deciliters 20=2l, 21 = 2.1l, etc.
2 = # of cam (or other) shafts 2 = slant block, 4 = balance shaft block
i = injection, t=turbo, all=all variants (i thru t)
cat = means with catalyst
One thing to observe is that the timing above is when the valve lifts off the seat not at 0.050 inches. So in actuality the duration is less and the overlap is less or even negative. The LSA though will not be effective b/c it is based off the lobe center.
The below information is only
theory; I have not physically tested or proved any of the information below. I
derived most of the information from the SAAB stock camshaft profiles using
information from “Performance Tuning in Theory & Practice”, A. Graham Bell.
I soon will be trying a few of the cam mixes on my own car. I will be sure to
list the outcome.
Noticeable characteristics of the different
B202t -1985: Two
features are specifically special about the 1985 camshafts. The first, the
intake cam is designed with every other inlet lobe having a 2mm smaller lift,
making total lift 7.65mm.
The varying lift causes turbulence in the flow which helps mix the gas and air
to aid in combustion. After 1985 the cylinder heads were casted to have more
swirl effect which creates turbulence, this enabled them from using a varying
lift intake cam. The second, the overlap of the intake valve opening and the
exhaust valve closing is 26 degrees which is lower than all the later years. The
small overlap prevents boost pressures from leaking out to the exhaust or
exhaust leaking back into the chamber (depending on backpressure ratio).
B234i 90-93: Only one specific feature, the retarded timing of the cam profiles. This might be due to the increase in displacement and excessive torque in the low or mid-range.
Performance
Mixing Stock Cams
B202i/B212i Intake cam in a 2.1/2.3 cylhead on a 2.0L block: The reasoning is driveability and filling out the power curves through the low and mid RPM's. The NA Intake cam will create a smaller LSA which along w/ the smaller duration will create more power on lower to mid rpm's (it will slightly limit boost, but the gain is supposedly better than the loss). The intake cam will end up closing earlier than the turbo cam, and since it is past 40bbdc, will slightly increase the actual compression ratio. Now ppl have favorable remark about this combo, but one problem present itself to me. The exhaust cam will have a duration of 14deg more than the intake. You know the theory of what goes in must come out, well if less is coming in then there's no reason for the extreme availability for more to leave. It's not a big issue, just an economy issue b/c you lose a little of the down force of the combustion from the exhaust valve opening so early especially at higher RPM's. From my opinion, if desiring more low-mid end power w/ the 2.1/2.3 head, the B202i/B212i or B234 intake cam and a different exhaust cam should be used. The B234 cams would probably be the best and easiest fix if the exhaust cam had a distrib slot.
You might look at the B234 cam and say that it might be a median point between the B202t cam and the B202i/B212i cam, but it's not. The B234 intake cam will create a lsa of 114 when mixed w/ the regular exhaust cam. The increase in LSA will theoretically push the power curve further up the rpm scale. And the exhaust cam would still have a duration of 8deg more than the intake (it's recommended, no more than 6 deg is what tuners suggest on most cars w/ restrictive exhausts or turbo's).
C900 Non Turbo:
Adjustable Cam Gears:
Common Aftermarket Turbo Grinds
| Manufacturer | Car | Inlet Lift | opens | closes | dur | Ex lift | open | close | dur | Lobe sep | Overlap |
| (mm) | (BTDC) | (ABDC) | (deg) | (mm) | (BBDC) | (ATDC) | (deg) | (deg) | (deg) | ||
| Crane | Mitsubishi 4G6, Neon, Chrysler 420 | 9.25 | 17 | 49 | 246 | 8.75 | 45 | 13 | 238 | 106 | 30 |
| Crane | Acura | 10.15 | 19.5 | 61.5 | 261 | 9.85 | 60.5 | 18.5 | 259 | 111 | 38 |
| Crane | Acura 1.8L B18A Turbo | 10.16 | 232 | 9.86 | 242 | 111 | |||||
| Neon/chrysler | Neon 2.0 dohc | 8.74 | 243 | 8 | 243 | 108 | |||||
| Crane | Neon 2.0 dohc Turbo | 9.24 | 246 | 8.763 | 238 | 106 | |||||
| Mitsu | Mitsu 420a DOHC 2L | 8.74 | 243 | 8 | 243 | 109 | |||||
| Crane | Mitsu 420a DOHC 2L turbo | 9.24 | 246 | 8.763 | 238 | 108 | |||||
| Buick | Regal | 9.75 | 22 | 56 | 258 | 10.36 | 58 | 24 | 262 | 106 | 46 |
| Crane | Camaro | 11.18 | 266 | 11.18 | 266 | 110 | |||||
| Holley Lunati | Grand National | 10.82 | 250 | 10.82 | 250 | 107 | |||||
| Holley Lunati | Grand National | 11.58 | 260 | 11.18 | 255 | 108 | |||||
| Competition Cams | Toyota 22R-series | 11.18 | 28 | 60 | 268 | 11.18 | 68 | 20 | 268 | 106 | 48 |
| DOA Racing | Toyota 22R-series | 10.922 | 18 | 46 | 244 | 10.92 | 62 | 34 | 276 | 111 | 52 |
| Volvo | stock | 9.94 | 9 | 36 | 225 | 9.9 | 39 | 0 | 218 | 118.5 | 3 |
| IPD | Volvo 240/740 2.1/2.3 | 11.38 | 245 | 10.64 | 236 | ||||||
| Sierra Cosworth | RS500 | 8 | 52 | 240 | 52 | 8 | 240 | 106 | 16 | ||
| Mazda | Eunos 800 10:1 14psi supercharged | 2 | 70 | 252 | 47 | 5 | 232 | 106 | 7 | ||
| Webcam | Porsche 934T 3.0L | 11.43 | 270 | 11.43 | 270 | ||||||
| Webcam | Porsche 944T 2.5L | 12.192 | 254 | 12.19 | 254 | ||||||
| Webcam | Audi 1.8L turob 20v | 7.874 | 218 | 9.83 | 225 | ||||||
| Webcam | Mits Eclipse 2L 16v | 10.54 | 274 | 9.906 | 274 | ||||||
| JME | Porsche 944T 2.5L | 12.065 | 11.18 | 116 | |||||||
| EBS Racing | Porsche 924T 2L | 11.938 | 264 | 11.94 | 264 | ||||||
| Engle | VW turbo street | 10.9 | 30 | 74 | 284 | 10.67 | 70 | 26 | 276 | 106 | 56 |
| Engle | VW turbo drag | 11 | 35 | 79 | 294 | 10.9 | 74 | 30 | 284 | 106 | 65 |
Performance Cam links: