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Old 06-18-2001, 03:52 PM   #1
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TPI Intake Manifold Torque specs

What is the correct torque for the intake manifold? Also, what should I set the timing at when I redo it? (stock..)
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Old 06-18-2001, 04:29 PM   #2
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25-45ftlbs according to my GM manual. Since it was such a wide range, I just use the old SOTP torque wrench.

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Old 06-18-2001, 04:33 PM   #3
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SOTP?
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Old 06-18-2001, 05:50 PM   #4
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Seat Of The Pants. Although, I personally don't prefer torque my intakes that way. Click the image to open in full size.

Torque always goes with hardware size. Look at the bolt, it carries its torque spec with it. 3/8" std thread should get about 30-35 ft-lbs. no matter whether it's an intake bolt, a bell housing bolt, water pump, exhaust manifold, etc.

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Old 06-18-2001, 08:08 PM   #5
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http://www.racer-x.f2s.com/proc/torkseq.htm#tpiseq

do it in this sequence and here are the torque specs...

http://www.racer-x.f2s.com/proc/torkseq.htm

stock timing is 6*, you may want to advance it to 8*, see if it gives you more power. if you have a scanner advance it as high as possible without any knock detection..
good luck
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Old 06-19-2001, 09:23 PM   #6
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Here are some other specs you might find useful.

http://www.gmtips.com/3rd-degree/dox...ecs/torque.htm
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Old 06-19-2001, 09:51 PM   #7
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Use a stubby 9/16 wrench and tighten them as tight as you can with one hand from the center out to the ends. Ditch those T-40 head intake bolts because you can't get at them with the runners on and go with the hex 3/8-16 bolts.

You must go back after a couple heat/cool cycles because they loosen up to the point of being finger tight after a week or so.

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Old 06-19-2001, 09:51 PM
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