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Cam timing -4,0,+4????? Stock LB9

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Old Jul 22, 2011 | 09:11 PM
  #1  
85 Frankenstein's Avatar
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Car: 1985 Camaro Z28
Engine: 1988 305 TPI
Transmission: 1993 T-56
Axle/Gears: 3.08
Cam timing -4,0,+4????? Stock LB9

Hello, I have a 1988 305 TPI engine with about 80k on the clock. I am in the middle of replacing the head gaskets and I figured while I am this far into the engine it would be a good idea to replace the timing chain and gears. I bought a cloyes double roller 9-3145. I also have a set of comp cams 1.6:1 full roller rockers to install if this makes a difference. From the research I have done I can't come to a definitive answer about how to set the cam timing. stock or four degrees either way. I have a t56 behind engine with 3.08 gears. I am running stock exhaust manifolds and exhaust, MSD coil and distributor. I cruise 70 mph at 1750 rpms. I rarely take the engine above four grand and want all of the drivability I currently have. Any advice is greatly appreciated. Thanks
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Old Jul 22, 2011 | 09:17 PM
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old z mzn's Avatar
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From: batavia ohio
Car: 1992 z-28
Engine: 383 stealthram
Transmission: auto
Axle/Gears: 4.10
Re: Cam timing -4,0,+4????? Stock LB9

stock cam... advance
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Old Jul 22, 2011 | 09:28 PM
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Re: Cam timing -4,0,+4????? Stock LB9

Originally Posted by old z mzn
stock cam... advance
Agreed. Especially T56 / 3.08:1...good luck with that, BTW. Only the Viper pulls that gearing. Unless you didn't get the good 0.50:1 sixth.
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Old Jul 22, 2011 | 09:29 PM
  #4  
85 Frankenstein's Avatar
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Joined: Dec 2010
Posts: 81
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Car: 1985 Camaro Z28
Engine: 1988 305 TPI
Transmission: 1993 T-56
Axle/Gears: 3.08
Re: Cam timing -4,0,+4????? Stock LB9

Is there any negative side effects from setting the cam timing advance four degrees? Issues with computer or anything else? From what I understand this should increase low end torque, correct?
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