When does ls6 intake and throttlebody become a restriction?
05-09-2014, 06:53 PM
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When does ls6 intake and throttlebody become a restriction? I know you can make big power with a stock throttle body and ls6 intake but at what point should you consider going to something bigger?
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05-10-2014, 07:06 AM
#10
This debate will never end....
So take MM's car that ran 8.6s with an LS6 intake... say he swapped to a FAST 102mm, he might have run 8.4s or 8.3s....just tossing out a number.
With boost, flow restrictions are minimized a little because, well, the air is being pushed to where it wants to go, but it doesn't mean there aren't gains to be had by reducing those restrictions, but at what cost?
Something that might help at WOT, under boost, might make it sluggish out of boost and hurt overall drivability on the street. It matters to some, and not so much to others.
So in summary, an LS6 intake can take you to 1000hp if that's your goal, but a simple intake swap might then yield a 100hp gain.
So take MM's car that ran 8.6s with an LS6 intake... say he swapped to a FAST 102mm, he might have run 8.4s or 8.3s....just tossing out a number.
With boost, flow restrictions are minimized a little because, well, the air is being pushed to where it wants to go, but it doesn't mean there aren't gains to be had by reducing those restrictions, but at what cost?
Something that might help at WOT, under boost, might make it sluggish out of boost and hurt overall drivability on the street. It matters to some, and not so much to others.
So in summary, an LS6 intake can take you to 1000hp if that's your goal, but a simple intake swap might then yield a 100hp gain.
05-10-2014, 09:34 AM
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This debate will never end....
So take MM's car that ran 8.6s with an LS6 intake... say he swapped to a FAST 102mm, he might have run 8.4s or 8.3s....just tossing out a number.
With boost, flow restrictions are minimized a little because, well, the air is being pushed to where it wants to go, but it doesn't mean there aren't gains to be had by reducing those restrictions, but at what cost?
Something that might help at WOT, under boost, might make it sluggish out of boost and hurt overall drivability on the street. It matters to some, and not so much to others.
So in summary, an LS6 intake can take you to 1000hp if that's your goal, but a simple intake swap might then yield a 100hp gain.
So take MM's car that ran 8.6s with an LS6 intake... say he swapped to a FAST 102mm, he might have run 8.4s or 8.3s....just tossing out a number.
With boost, flow restrictions are minimized a little because, well, the air is being pushed to where it wants to go, but it doesn't mean there aren't gains to be had by reducing those restrictions, but at what cost?
Something that might help at WOT, under boost, might make it sluggish out of boost and hurt overall drivability on the street. It matters to some, and not so much to others.
So in summary, an LS6 intake can take you to 1000hp if that's your goal, but a simple intake swap might then yield a 100hp gain.
05-10-2014, 12:16 PM
#13
Back in 08 I ran a 8.9-9.0@155-156 with a 402 and 91mm @14 psi on pump gas. I didn't go any faster on 17psi but I never changed the ls6 intake, stock tb, or intercooler. It can flow some decent air but there are better options out depending.
05-10-2014, 12:19 PM
#14
Your theory is correct, though. I'm sure with a 143mph trap, you will get similar power at a lower boost. Sounds like your application is too specific for anyone to know exactly how much, though.
05-10-2014, 01:06 PM
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I'm sure it's not a set number of hp gain (eg, "100hp by switching from LS6" or even a linear scale (eg, a % gain by going to a FAST).
Your theory is correct, though. I'm sure with a 143mph trap, you will get similar power at a lower boost. Sounds like your application is too specific for anyone to know exactly how much, though.
Your theory is correct, though. I'm sure with a 143mph trap, you will get similar power at a lower boost. Sounds like your application is too specific for anyone to know exactly how much, though.
05-10-2014, 03:19 PM
#16
At 10 psi, I don't see a different intake helping you make more power. If we were talking 25-30 psi then maybe we could see your scenario playing a role.
If you want more power, I would just turn up the boost. Boost is free at these power levels. Intakes no matter what they are made of cost money. I like the free stuff when possible.
If you want more power, I would just turn up the boost. Boost is free at these power levels. Intakes no matter what they are made of cost money. I like the free stuff when possible.
05-10-2014, 03:40 PM
#17
Surely this is down to the engine size / config not the boost you are running (assuming you not blowing the intake apart) or power you are making. Once the air is in the intake the engine dosent give a ***** what presure it's at as it will simply be sucking in higher density air. This is why ITB setups on turbo engines still give amazing throttle response.
So assuming you engine isn't chocked by the intake when in na form, and your not running **** loads of boost, in theory you should be fine.
A intake swap might bet more power but it should be in line with what happens na. At least that's my understanding.
So assuming you engine isn't chocked by the intake when in na form, and your not running **** loads of boost, in theory you should be fine.
A intake swap might bet more power but it should be in line with what happens na. At least that's my understanding.
05-10-2014, 04:40 PM
#18
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What size is your boost plumbing ?
Wasnt there a guy on the forum not that long ago who had some FAST intake and large TB with his blower, and he sold it and moved to the LS6....think it actually gained power lol.
Not enough to say it was better though. But certainly enough to say the FAST was not an upgrade at all.
