B-motor cam Specs

[GRMPer]

Here's Crane Cam's F-260/450-10 cam for the 99

PART REGRIND00561 ENGINE TYPE: MECHANICAL SPECIAL

GRINDN F-260/450-10

ENGINE SAAB 99 SOHC 2 LITRE 4 CYLINDER

VALVE SETTING: .010 EXHAUST .012 COLD

INTAKE @ CAM
450 @
-- ROCKER ARM

INTAKE @ CAM
450 @
-- -- ROCKER ARM

LIFT: EXHAUST @ @

ALL LIFTS ARE BASED ON ZERO LASH AND THEORETICAL ROCKER RATIOS

CAM
OPENS
CLOSES
ADVERTISED

.008 EXHAUS INTAKE 48 BTDC 78 ABDC 306 ° °



TAPPET LIFT EXHAUS
88 BBDC 38 ATDC 306 °

SPRING
RECOMMENDED RPM

RANGE WITH

TRIPLE DUAL OUTER MATCHING

PART
-- MINIMUM RPM --

LOAD CLOSE
-- LBS -- O -- MAXIMUM RPM --

OPEN:
-- LBS -- VALVE FLOAT --

CAM
OPENS
CLOSES
MAX LIFT
DURATIO

@ .050 INTAKE
25 BTDC 55 ABDC 105 ° ATDC 260 °

TAPPET LIFT EXHAUS
65 BBDC 15 ATDC 115 ° BTDC 260 °

[GRMPer]

Another:

PART REGRIND00672 ENGINE TYPE: MECHANICAL SPECIAL

GRINDN F-230/440-2-12

ENGINE SAAB 99 SOHC 2 LITRE 4 CYLINDER

VALVE SETTING: .014 EXHAUST .016 COLD

INTAKE @ CAM
440 @
-- ROCKER ARM

INTAKE @ CAM
470 @
-- -- ROCKER ARM

LIFT: EXHAUST @ @

ALL LIFTS ARE BASED ON ZERO LASH AND THEORETICAL ROCKER RATIOS

CAM
OPENS
CLOSES
ADVERTISED

.014 EXHAUS INTAKE 39 BTDC 73 ABDC 292 ° °



TAPPET LIFT EXHAUS
88 BBDC 34 ATDC 302 °

SPRING
RECOMMENDED RPM

RANGE WITH

TRIPLE DUAL OUTER MATCHING

PART
-- MINIMUM RPM 3800

LOAD CLOSE
-- LBS -- O -- MAXIMUM RPM 6800

OPEN:
-- LBS -- VALVE FLOAT 7800

CAM
OPENS
CLOSES
MAX LIFT
DURATIO

@ .050 INTAKE
8 BTDC 42 ABDC 107 ° ATDC 230 °

TAPPET LIFT EXHAUS
57 BBDC 3 ATDC 117 ° BTDC 240 °

ABOVE TIMING REFLECTS ZERO LASH.

[GRMPer]

REGRIND00416 ENGINE TYPE: MECHANICAL SPECIAL

GRINDN F-268/470-10

ENGINE SAAB 99 SOHC 2 LITRE 4 CYLINDER

VALVE SETTING: .010 EXHAUST .012 COLD

INTAKE @ CAM
470 @
-- ROCKER ARM

INTAKE @ CAM
470 @
-- -- ROCKER ARM

LIFT: EXHAUST @ @

ALL LIFTS ARE BASED ON ZERO LASH AND THEORETICAL ROCKER RATIOS

CAM
OPENS
CLOSES
ADVERTISED

.016 EXHAUS INTAKE 40 BTDC 70 ABDC 290 ° °



TAPPET LIFT EXHAUS
80 BBDC 30 ATDC 290 °

SPRING
RECOMMENDED RPM

RANGE WITH

TRIPLE DUAL OUTER MATCHING

PART
-- MINIMUM RPM --

LOAD CLOSE
-- LBS -- O -- MAXIMUM RPM --

OPEN:
-- LBS -- VALVE FLOAT --

CAM
OPENS
CLOSES
MAX LIFT
DURATIO

@ .050 INTAKE
29 BTDC 59 ABDC 105 ° ATDC 268 °

TAPPET LIFT EXHAUS
69 BBDC 19 ATDC 115 ° BTDC 268 °

USE NEW CAM FOLLOWERS TO PREVENT CAM

[GRMPer]

So, which one would be the best for a CIS engine/non turbo/rally engine?

Looks like maybe one is for turbo and two are for NA?

[Crazyswede]

Call Jack Lawrence at MSS (Motor Sports Service) in Jamestown NY. They offer some of the best performance parts available for the older Saabs and everything is designed specifically for Saabs. The number is: 716-665-4200

They should have a simple catalog available with specs and prices. The prices are reasonable. i had their 3800 - 7200 rpm cam with their street headers and exhaust in my 75 99 and it was pretty zippy. That would be a good cam for a rally car. You will want the double valve springs to go with it.

[GRMPer]

Jack gets his cams cut elsewhere--I suspect that's Crane, as they also do not weld up their cams before they are reground.

Crane is 5 miles from my office.

[Luke]

I'm having problems sorting through those specs, seems a lot of specs are missing? The one advantage to MSS is you can call up and talk to a human and know that what you are getting will work...

I think jordan has a spec sheet from his MSS cam though which sounds like the same one seth had, maybe he can post up an image of it.



edit: never mind I found it:

[Jordan]

I think the one Seth is talking about is more 'street' and less race. Geoff has the one I have though I think. My understanding of the stock cams is that the turbo cams give a better low -mid range for turbo spool up, off boost power...whilst the NA cams are made more for mid-upper range. I'd think you would want a similar philosophy in reworked cams.

If only we had a short ratio gearbox to really keep the engine really rung out....

[Crazyswede]

the one I had was an aggressive street mild race cam. It would have been a good rally car cam. The engine pulled well up to 4000 rpm but it felt even better from 4000 on up.

[GRMPer]

You're right, not getting a lot of good answers from Crane, and for 2-300 bucks, I'd rather know what I have.

I'm having problems sorting through those specs, seems a lot of specs are missing? The one advantage to MSS is you can call up and talk to a human and know that what you are getting will work...

I think jordan has a spec sheet from his MSS cam though which sounds like the same one seth had, maybe he can post up an image of it.



edit: never mind I found it:

[GRMPer]

Just ordered:

275090 street cam 3800-7800 range
dual valve springs
upper/lower retainers
compensating shims
lightened flywheel

from Jack.

Still haven't heard back from the machine shop on the short block's condition. But..just won a newly rebuilt B head on ebay for $89 shipped, so if my head(s) are junk, I've got another to play with.

[Jordan]

Did you happen to talk to Jack about target compression, pistons...etc ? I've been meaning to call him to get some info, but I can't really do anything with that info at the moment.,so I haven't bothered him yet... just curious.

[GRMPer]

Nope, I just talked heads...the bottom end will be discussed once I know the overbore/bearing oversizes

Probably go w/ those 9.3 crs earlier pistons instead of the 8:1 stockers.

[Jordan]

Did he have any tips on the head?

[GRMPer]

Mostly just "exhaust only for porting...don't worry about valves with the street/rally engine..."

From my experience..you can tell the exhaust ports need work just by looking at them and the exhaust manifold/header that they bolt too..port matching, as well as enlarging the transition/90-degree turn out of the combustion chamber should do a lion's share of the work.