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

Throttle body

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Old Jul 14, 2005 | 01:04 AM
  #1  
Jeremy_30th's Avatar
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From: Demotte,Indiana
Throttle body

I am going to buy a new one probably Holley and I had a couple questions.

What size is stock 48mm right?

Intake should be @ 52mm right?

If I go to 58mm I will need to port the intake and have my PCM tuned for it right?\

With my mods 52mm will probably be enough right? I know its not a real big gain, I am mostly doing it for looks but a couple HP is good to
Old Jul 14, 2005 | 02:14 AM
  #2  
1racerdude's Avatar
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Re: Throttle body

Originally Posted by Jeremy_30th
I am going to buy a new one probably Holley and I had a couple questions.

What size is stock 48mm right?

Intake should be @ 52mm right?

If I go to 58mm I will need to port the intake and have my PCM tuned for it right?\

With my mods 52mm will probably be enough right? I know its not a real big gain, I am mostly doing it for looks but a couple HP is good to

A 52 will fit OK, 58 would be better, but I would have it retuned to put more fuel to it along with more air. Remember your CAI and the filter. The 6" K&N only flows 750CFM and a 52 is right in that neighborhood.A 58 flows about 900-950CFM.
Old Jul 14, 2005 | 06:27 AM
  #3  
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Re: Throttle body

true a 58 would be better , but im extremly happy with my 52 you should be fine with a 52
Old Jul 14, 2005 | 06:28 PM
  #4  
Jeremy_30th's Avatar
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Re: Throttle body

Isn't tuning required with a 58mm? And aren't the intakes only opened to 52mm?
Old Jul 14, 2005 | 06:36 PM
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1racerdude's Avatar
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Re: Throttle body

Originally Posted by Jeremy_30th
Isn't tuning required with a 58mm? And aren't the intakes only opened to 52mm?
Correct.
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