T5 cams on T7 engine - The Saab Link Forums

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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 08-20-2009, 05:31 AM   #1
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T5 cams on T7 engine

I just installed T5 cams on my T7 engine, and it idles like crazy...should I wait the ECU to adapt the new cams, because frankly I stopped the engine immediatelly, a little bit scared.
Thanks for inputs!
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Old 08-20-2009, 05:48 AM   #2
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Are they timed correctly to factory specs? Sounds like they are off one tooth. Also possible that a hose was left off. All the Stg3> cars here we have swapped you could not notice the change except for the power gains.
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 08-20-2009, 05:49 AM   #3
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hmm, that's strange. when i swapped to T5 cams the car acted just the same at idle...
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Old 08-20-2009, 06:17 AM   #4
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What Nick said. It's off by one tooth and you get a noise like your pistons were cracking.
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Old 08-20-2009, 06:35 AM   #5
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ya, timing is off
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Old 08-20-2009, 06:43 AM   #6
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Timing.
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Old 08-20-2009, 06:49 AM   #7
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true

Quote:
Originally Posted by rafal View Post
What Nick said. It's off by one tooth and you get a noise like your pistons were cracking.
I will check the chain positioning... Not really a noise like the pistons were cracking, more like some vibration in the cabin (I blamed the upgraded engine and transmission mounts fron Nick and the deletion of the balance shafts).
Hope I didn't broke something!....
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Old 08-20-2009, 07:38 AM   #8
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In a 2.0 street car it is fine and wise to get rid of balance-shafts. On a 2.3 it will shake. Older B234 with heavy pistons will shake worse. 235 pistons and rods are lighter and in stock form seem to be smoother.
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 08-20-2009, 09:54 AM   #9
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Did you zip tye the sprockets as from what I can tell it's almost impossible for them to move if you do this? Are you sure they are not NA cams?
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Old 08-20-2009, 11:43 AM   #10
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Right on, Nick!

Quote:
Originally Posted by GenuineSaab View Post
possible that a hose was left off.
As usual, Nick T. was right: a hose poped-off, and I was some 3 miles away from the work-shop, in a drive-test. After seeing on my Blackberry Nick`s post, I checked the engine bay and saw a hose was off. Put it back and the beast was awaken!
This is what I call unity and true knowledge.
As I said many times before: Nick T. is a real SAAB SAVIOR!
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