LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Headers, Y-Pipe, Rocker Arm questions

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Old 01-06-2007, 11:12 PM
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Default Headers, Y-Pipe, Rocker Arm questions

Hey guys and gals,

I own a '93 T/A and I have these parts EXACTLY Hooker LTs, Crane 1.6 Gold Race SA rocker arms and a Mufflex Y-pipe sitting in my room and I have afew questions.

What else do I need to install these parts?
What do I torque the rocker arms to?
o2 extensions... do I need them?
if yes, where do I get them?

Do I need any extra parts to hook this to my Magnaflow cat-back?

Should I get a TB to add on to these performance parts?
if yes, 52mm or 58mm?
Old 01-06-2007, 11:33 PM
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You stock TB is fine, needed O2 Ext. can be got from www.thunderracing.com, adjust Rockers to lash points, then tighten. Headers are a fun project, you know how to do them?
Old 01-06-2007, 11:36 PM
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Seeing as my car is in storage until Mid March... I'm not looking for instructions yet because I will loose them, I'm just trying to get ALL the parts I need so when I start the projects I won't need to wait for parts...
Old 01-06-2007, 11:37 PM
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The only thing I didn't see you list was the locks for the Rockers, you have them? Get you a good set of Exhaust Gaskets also.
Old 01-06-2007, 11:51 PM
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I believe I have the locks, is it possible to tune out the o2 sensors? Also I have no idea what you mean by lash points... how far do I turn after snug?
Old 01-06-2007, 11:55 PM
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You have to adjust the Rockers at certian points. Half can be done at #1 TDC, and the other half at #6 TDC. It's not necessarily snug, you play with the Pushrod until you get resistance, and then about a 1/4 turn at the most, then tighten them down.
You need the O2's, leave them be.
Old 01-06-2007, 11:56 PM
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how can you tell when its at TDC without pulling a plug? well hell, cant see anything either with a plug pulled.
Old 01-07-2007, 12:06 AM
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There is a little notch on the Balancer. You get that pointing up, you will have your Valve Covers off anyways, look at #1 and #6 rods. Turn the Balancer in both directions a little bit, and whichever ones move, the other Cylinder is TDC. Then put the notch back to straight up, put the Rockers on according to that Cylinder, then turn the Crank ONE(1) complete turn, and do the other 8 Rockers.
Old 01-07-2007, 12:24 AM
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so it could only be #1 and #6 at TDC, not the other cylinders?
Old 01-07-2007, 12:28 AM
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Every Cylinder has a TDC, that is when it is in the Firing position, Valves closed, Rockers can be properly adjusted. #1 and #6 just happen to be the 2 key Cylinders cause they are the ones that the notch indicates on the Balancer, so you look for them 2. That, and all of the shortcuts to adjust the lash are based off of them 2.
Old 01-07-2007, 12:32 AM
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ok so look for when both rocker arms are up/valves closed. then you do thoes rockers first, then you do the others when the balancer is turned 1 turn?

ive seen people just bolt the rockers on, and tighten them until there is barely any play in the pushrods, then run the engine and tighten them.

Last edited by Revelation Z28; 01-07-2007 at 12:37 AM.
Old 01-07-2007, 12:39 AM
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Yea, figure out which ones don't move when you turn the Crank a little bit, that is the one that is at TDC. I will post a thread with the Rocker Adjustment Diagram.
Old 01-07-2007, 12:41 AM
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so it would be easier to put em on when each cyl is at DTC.
Old 01-07-2007, 12:53 AM
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It does the same, but that takes a little bit longer. The #1/#6 method saves alot of time and still gets the same thing done.



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