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Just installed the T1 cam...Is this normal?

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Old Dec 21, 2003 | 05:59 PM
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Default Just installed the T1 cam...Is this normal?

Hey guys I just got finished installing a T1 cam and some used LS6 springs in my '99 Z and now I have a bad idling issue (but I just need to open up the TB idle hole some to fix that). Also I've got a real loud ticking noise coming from the engine that is kind of worrying me. It seems to make this ticking noise once every cam rotation. Did I mess something up or is this just the valvetrain noise that I heard about getting depending on the cam? Cam specs BTW are 221/221 .558/.558 112 Let me know what your thoughts are on this before I go and drive around a bunch.

TIA,
Ryan
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Old Dec 21, 2003 | 06:41 PM
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Maybe listen & see if you can determain which side it's coming from.
Then pull that valve cover & inspect the rockers.
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Old Dec 21, 2003 | 06:42 PM
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put some miles on the car so the stock tuning can adjust fuel curves and such. since its a 112lsa it'll be pretty lopey and drilling out the TB a bit will help with idle. the normal vavletrain noise will sound like a sewing machine. i'd pull the vavle covers and chekc for a loose rocker or something.
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Old Dec 21, 2003 | 07:07 PM
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What year ls6 springs did you use?? Really the 02-03 springs at rated at .551 lift so your pushing it.The 01's or blue ones are like .525lift so they are a no no
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Old Dec 21, 2003 | 07:13 PM
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yea those ls6 springs aren't up to the task of a t1 cam
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Old Dec 21, 2003 | 07:22 PM
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T1 has ~ .558, in the long run that might be a problem with the LS6 springs rated at .551

Did you checked the install heights or shim the springs etc?
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Old Dec 21, 2003 | 07:35 PM
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I was told that the springs were '02s. They are blue though, so I asked one of the local shops if it is in fact an 02 and they said that they were. I've also been under the impression that '02 LS6 springs were rated to .600 lift max ??? Let me know if I made my decision with the wrong info and picked the wrong parts.
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Old Dec 21, 2003 | 07:38 PM
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my friend has a T1 cam.. i believe he had to get MTI to drill the throttle body and dyno tune it for it to idle right.
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Old Dec 21, 2003 | 07:44 PM
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I have a T1 cam that MTI installed. They did drill the throttle body some and did LS1edit tuning. I had the 918 springs on there for 20000 miles. Now I have different heads with dual springs but the 918's held up good.

Les
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Old Dec 21, 2003 | 07:49 PM
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Originally Posted by 99_1LE_Z
I was told that the springs were '02s. They are blue though, so I asked one of the local shops if it is in fact an 02 and they said that they were. I've also been under the impression that '02 LS6 springs were rated to .600 lift max ??? Let me know if I made my decision with the wrong info and picked the wrong parts.
the 02+ ls6 springs are only good for .560-.570 max. good cam decision, bad spring decision. pick up some manleys or 918's.
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Old Dec 21, 2003 | 07:52 PM
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http://www.slponline.com/view_produc...RTNUMBER=53302

SLP lists the 02 LS6 springs as NOT being ok with .600 lift
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Old Dec 21, 2003 | 08:17 PM
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918s dude.
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Old Dec 21, 2003 | 08:27 PM
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I have a T1 too and while it does idle pretty rough, the ticking is definitely unusual. Get rid of those springs. I have 918s.

Dope
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Old Dec 21, 2003 | 08:27 PM
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Blue stripes are the older springs 00 If I remember right, your gonna float them with that cam.
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Old Dec 21, 2003 | 08:31 PM
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I believe the T1 cam requires longer push rods for proper lifter preload. One T1 cam measured 1.495 diameter base circle. Stock is 1.552. This compensates for .03 milled heads with stock push rods.

If your heads are not milled then this is probably why you hear noise. If so you will need .03 longer push rods.
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Old Dec 21, 2003 | 09:15 PM
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Originally Posted by Larry
I believe the T1 cam requires longer push rods for proper lifter preload. One T1 cam measured 1.495 diameter base circle. Stock is 1.552. This compensates for .03 milled heads with stock push rods.

If your heads are not milled then this is probably why you hear noise. If so you will need .03 longer push rods.
Anybody else know anything about this?
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Old Dec 21, 2003 | 09:44 PM
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Originally Posted by Larry
I believe the T1 cam requires longer push rods for proper lifter preload. One T1 cam measured 1.495 diameter base circle. Stock is 1.552. This compensates for .03 milled heads with stock push rods.

If your heads are not milled then this is probably why you hear noise. If so you will need .03 longer push rods.
The blue spings are 01 springs. o2 and 03 are yellow or greenish. I dont think you need longer pushrods. Larry do you have any articles that say this that we could read??
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Old Dec 21, 2003 | 10:30 PM
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Stock length pushrods should be fine.
The ticking is normal.
Just get those slime green ls6 springs outta there already and replace them with 918's.
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Old Dec 21, 2003 | 10:38 PM
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I also have the T1 and manley springs with no problems yet or that I know of. It does idle rough, but I have not heard of needing longer pushrods? not sure.
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Old Dec 22, 2003 | 06:31 AM
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Do you think I could drive the car around for a while with these LS6 springs in the head if I just do easy city driving, until I get the 918s?
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