93-95 vs 96-97 crank hub - LS1TECH

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93-95 vs 96-97 crank hub

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Old 05-06-2012, 04:39 PM   #1
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Default 93-95 vs 96-97 crank hub

I just noticed that my car has a 96+ timing cover on it with the CPS hole plugged. This makes sense as a few years ago when I was doing my cam install I found there was the crank reluctor wheel in front of the timing gear. I removed the reluctor wheel and ran the car until now and never had any problems.

So measuring the hub i get 3.5" or really damn close to it. The long hub is 3.519" so I guess this means I've been running the wrong hub for the last 20k miles.

So my question is do I really need the longer hub? or can I just put it back together like it is? Does the hub hold the crank timing gear in place?

I guess the easiest way to fix the problem would be just reinstall the crank reluctor wheel.
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Old 05-06-2012, 04:45 PM   #2
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If it is bottoming on the crank snout youre good. The longer hub instead of butting up against the whee butss up againstt he timing gear.
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Old 05-06-2012, 05:12 PM   #3
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Yes you need the correct. Unless you dont mind your timing chain to have the potential to walk and cause nothing but **** blowing up.
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Old 05-06-2012, 05:15 PM   #4
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I know youve tried to get a crank timing gear off before, and if it did move it the movement potential is the thickness of the reluctor gear which is an 1/8th of an inch
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97 WS6 Black hardtop, lt beige leather.

Fully Forged 383 bottom end. 11.3:1 Compression, AFR 190 old style heads, custom cammotion cam (240/242@.050, .600.605 lift, 111 LS)
Performabuilt Lvl 2 tranny, 3000 PE Vigilantee, 4.10 gears.
Track times with new motor coming this spring. Old 383 went low 11s.
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Old 05-06-2012, 05:29 PM   #5
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I just remeasured the hub more carefully, looks like it is the longer hub. Its right at 3.6". I also checked and the timing gear is fully seated onto the crank, it cant go back any further. So I think I'm good.
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