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Another Cam timming question with sc cams

Hi guys am about to set my cams
My car is an 89 930 and have sc cams
I did a search and I came up with numbers all over the place ( 1.1-1.7)
Have an andial ic , k27-7200
Where do I set my cams for mostly city driving with the occasional hwy ride
Thanks
Erick
Old 03-06-2014, 03:09 PM
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I'm about to cross this bridge in a few weeks

Chris @ TC was kind enough to suggest the following for me:

"Camshafts -- we use the 1.4-1.7mm range to help lower rpm torque. For a moderate CIS engine with bolt-ons (headers, muffler, turbo, IC, boost) go the full 1.7mm.

Sure, it won't pull as hard at 5,800rpm as if you set them at 1.5mm, but you'll have more torque at 3,000rpm and that's usually what you feel when ripping around on the street."


Hope that helps...
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Old 03-06-2014, 05:16 PM
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I always shoot for 1.7. Usually get 1.65 and call it a day. Make sure to match the left to right with .1 no matter where you finally choose to set them.
Old 03-06-2014, 06:23 PM
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Wow hat was long , was able o get 1.7 l and 1.72 right
Thanks Guys
Old 03-06-2014, 10:32 PM
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Anyone have suggestions for 964 cams? 1.26mm at TDC overlap is stock and advancing them helps increase lower midrange torque while giving up a little top end and retarding them is better for high rpms if tracking. I can't afford to track the car so mines for the street.

For a street car is stock stock 964 cam timing best all around or advance them a little since your not pushing it over 5500 rpm most of the time anyway? I timed them at 1.3mm last time but maybe 1.35mm or more would be better?
Old 03-07-2014, 04:07 AM
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Quote:
Originally Posted by JFairman View Post
Anyone have suggestions for 964 cams? 1.26mm at TDC overlap is stock and advancing them helps increase lower midrange torque while giving up a little top end and retarding them is better for high rpms if tracking. I can't afford to track the car so mines for the street.

For a street car is stock stock 964 cam timing best all around or advance them a little since your not pushing it over 5500 rpm most of the time anyway? I timed them at 1.3mm last time but maybe 1.35mm or more would be better?
Jim, what is the stated range spec'ed by the cam supplier?
If it were my car I would go to the high end of the spec, like I did on my SC cam installation. I concur that torque near the redline is not very useful in a street car (unless you want to go to jail )
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Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 03-07-2014, 04:27 AM
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The cams were ground by Web cam so I'll call them and ask. 1.26mm is stock 964 cam timing and I read here you can advance them up to 1.53mm
Old 03-07-2014, 04:50 AM
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I have the webcam card hanging on the wall in front of me and it says 1.25 with no tolerance (964 cam). So if you call them and they say different please post back here. Bruce doesn't give a recommendation in the edition of his book I have.
Old 03-07-2014, 05:10 AM
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I scanned the one that came with my cams from them. There is some room to retard or advance them to move the power band up or down the rpm range. 1.25mm is the stock 964 mid point.
It looks like this...
Old 03-07-2014, 06:17 AM
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You could set to 1.4 and then check the piston to valve clearance to be safe.
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Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 03-07-2014, 09:03 AM
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