LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

BBK 58mm TB question

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Old Feb 8, 2005 | 06:07 PM
  #1  
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BBK 58mm TB question

Did a search couldn't find info I was looking for. Does anyone know for sure when boring out the intake for a BBK 58mm TB, are the openings on center? It would be no problem if I had intake and TB in the same place but they are about 300 miles apart at the moment and I'm getting the intake machined here. Thanks!!
Old Feb 9, 2005 | 06:47 AM
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Re: BBK 58mm TB question

Someone's gotta know.......
Old Feb 9, 2005 | 07:06 AM
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Re: BBK 58mm TB question

I'll be home around 6:30pm Eastern Time tonight, if nobody has your answer by then I'll whip out the calipers and let you know.

I'm pretty sure they're on center though, but I'll check tonight.
Old Feb 9, 2005 | 08:47 AM
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Re: BBK 58mm TB question

Thanks really appreciate it!!
Old Feb 9, 2005 | 10:34 AM
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Re: BBK 58mm TB question

Try this: http://www.bfranker.badz28.com/96ss/58porting.htm
Old Feb 9, 2005 | 10:55 AM
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Re: BBK 58mm TB question

Thanks...good to hear from a fellow Iowan...
Old Feb 9, 2005 | 11:06 AM
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Re: BBK 58mm TB question

The BBK is dead center. I believe the AS&M is offset at least that is what Brent told me. I had my intake off and wanted to port it to 58mm size just incase i went to a 58mm TB later. I just used a caliper and opened the bores 5mm all the way around. When i finally got my BBK TB it matched up perfect.
Old Feb 9, 2005 | 04:03 PM
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Re: BBK 58mm TB question

Thanks...that's what I was looking for!!!
Old Feb 9, 2005 | 04:34 PM
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Re: BBK 58mm TB question

my bbk was not centered at all.
Old Feb 17, 2005 | 04:49 PM
  #10  
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Re: BBK 58mm TB question

Just for future reference the BBK matches up perfect if you enlarge on center. Mine is sitting here looking good.
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