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Difference in TB through years?

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Old Apr 2, 2011 | 04:39 PM
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Default Difference in TB through years?

So I bought a LS6 intake manifold that came with a throttle body, I had the bright idea to port the throttle body that came with it, took my about a week working on it off and on, anyway, on going to swap my stock one out for it, I find the piece the throttle cable goes to, is a different size, its bigger, so when I hook the throttle cable up, the blade doesn't close all the way. Just curious if there was a difference through the years. It was a giant waste of time.
I have pictures but I can't post them using the computer I'm on. I'll try and get them on later.
Thanks
C.
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Old Apr 2, 2011 | 09:09 PM
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The throttle body on the earlier cars (97 & 98?) had a smaller cam. Not sure if you can swap cams with the throttle body on the car. I'm sure someone with more experience will chime in.
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Old Apr 2, 2011 | 09:15 PM
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There was a diff in the linkage length.
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Old Apr 2, 2011 | 11:03 PM
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Here are some photo's, the first is the ported one I did, the bigger one. The second is the stock one I pulled off my car, as you can tell its smaller. The third is a picture of how far the throttle blade remains open with the throttle cable hooked up on the ported TB.
C.
Attached Thumbnails Difference in TB through years?-img_20110320_122726.jpg   Difference in TB through years?-img_20110320_122741.jpg   Difference in TB through years?-img_20110320_122714.jpg  
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Old Apr 2, 2011 | 11:10 PM
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The two cams seem to have roughly identical draw length
but a different angle per draw profile. I have swapped
them around and found no difference other than this.
But if you were over-snugged, the early years' greater
initial angle per draw would show it more.
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Old Apr 2, 2011 | 11:31 PM
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Originally Posted by jimmyblue
The two cams seem to have roughly identical draw length
but a different angle per draw profile. I have swapped
them around and found no difference other than this.
But if you were over-snugged, the early years' greater
initial angle per draw would show it more.
You've lost me, to me the two cams look really different. Ill get a side by side photo tomorrow that'll show it better. It just ticked me off that I can't use it.
C.
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Old Apr 3, 2011 | 08:32 AM
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why don't you swap the cams? hard to tell from the pictures but it looks like the shafts are the same lenght.
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Old Apr 3, 2011 | 08:42 AM
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A buddy had a 98 TA, he swapped the TB off an '02. When he was tuneing he was told to go WOT. He said he was. The tuner informed him the computer wass only reading 3/4 throttle. After checking he found out that the cams are differnt. After he changed the cable it worked fine.

BTW, the porting looks pretty good.
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Old Apr 3, 2011 | 09:25 AM
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Looks like you just need the throttle cable from a car of the same year as your intake. This is why we have been blessed with auto parts stores and mail-order services.
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Old Apr 3, 2011 | 07:01 PM
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You can swap the shafts between early & late LS1 TBs.
Cam is staked onto the shaft. You just have to get the
blade & TPS off,and pop it with a brass drift.
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