GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

1 3/4" vs 1 7/8" Long tube

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Old Feb 21, 2016 | 08:15 PM
  #11  
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Originally Posted by 01ssreda4
You don't have the slightest clue. Since you'll disagree, answer this one question, if there is absolutely nothing to lose, why do most engines come with cast manifolds? Point being, LTs would come on every single engine manufactured if there truly was nothing to lose.



Watch who you listen to bud.
Whoops; guess I stepped on the wrong toes.


Manufacturers use cast manifolds for considerations other than just performance.

My point being that he won't suffer any loss going from factory manifolds to LTs, whether 1 3/4" or 1 7/8".
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Old Feb 23, 2016 | 09:41 AM
  #12  
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ok does anyone have dyno graph to compare ?
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Old Feb 23, 2016 | 12:21 PM
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Originally Posted by Alco
ok does anyone have dyno graph to compare ?
Dyno's can be skewed.

Get the headers YOU want. There are plenty of people making decent power on 1 3/4 AND 1 7/8.
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Old Feb 23, 2016 | 09:04 PM
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Ive owned them all. Every time you go up in size on the primary, low and midrange suffers, and top end gains. Doesn't mean the low and mid range is crap, it just means it is less then the smaller primary. And that's fact!!
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Old Feb 23, 2016 | 09:29 PM
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I went from 1 3/4" long tubes to 1 7/8 long tubes and I can not even tell the difference. it does sound a little deeper but as far as losing low end I cant tell or gains on top end. I have a 5.3 l with a low lift 212 218 cam. 2600 stall 4.11 gears magna flow cat back, CAI. 2005 CCSB Silverado.
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