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When does ls6 intake and throttlebody become a restriction?

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Old May 11, 2014 | 02:53 PM
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its a restriction straight off the factory floor....
it doesnt mean you cant go fast....

but you will go faster if you upgrade to something better flowing

the fact that you can pick up 30+ HP Naturally aspirated with a 102 Intake/TB and a mild tune and no other changes shows you just how much of a restriction it is.
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Old May 11, 2014 | 03:23 PM
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Originally Posted by soundengineer
its a restriction straight off the factory floor....
it doesnt mean you cant go fast....

but you will go faster if you upgrade to something better flowing

the fact that you can pick up 30+ HP Naturally aspirated with a 102 Intake/TB and a mild tune and no other changes shows you just how much of a restriction it is.

Which means diddly squat when blowing boost through it, and it's a safe bet he will not go faster unless it's a particularly special intake.
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Old May 11, 2014 | 03:25 PM
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yeah... not everybody picks up when going from stock to aftermarket on a boosted setup....

and usually with a boosted setup its a smaller gain going from LS6 to 102.....

and of course its dependent on a lot of other factors as well...

likely at the lower end of the boost spectrum, its not worth the small gains you will see.
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Old May 11, 2014 | 03:32 PM
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Fitting excessively large TB's with boost not only doesnt gain anything, it's just stupid when the TB might flow all the air the engine can consume nowhere near it's full opening.

So see people with 3" boost plumbing, lots of bends etc....then fit a 102mm...ie 4" TB ??

WTF.
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Old May 11, 2014 | 06:23 PM
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Originally Posted by soundengineer
its a restriction straight off the factory floor....
it doesnt mean you cant go fast....

but you will go faster if you upgrade to something better flowing

the fact that you can pick up 30+ HP Naturally aspirated with a 102 Intake/TB and a mild tune and no other changes shows you just how much of a restriction it is.
Thanks, I think what some are missing is just because you can make X amount of power with a LS6 doesn't mean it's efficient. The higher you have to raise the boost to achieve that same power the more back pressure and heat you create.
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Old May 11, 2014 | 06:26 PM
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the simple test is to do a back to back on the dyno.....
with no other changes one of two things will happen...

either you will make more power with the same amount of boost
or you will make the same amount of power and see less boost(I mean measurement of restriction)
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Old May 11, 2014 | 06:27 PM
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Originally Posted by stevieturbo
Which means diddly squat when blowing boost through it, and it's a safe bet he will not go faster unless it's a particularly special intake.
if your opinion holds true there's no need for anyone to even upgrade to a ls6 intake or any other intake. So people making 1000-1200rwhp are wasting money on aftermarket intakes.
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Old May 11, 2014 | 06:29 PM
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Originally Posted by mike13
if your opinion holds true there's no need for anyone to even upgrade to a ls6 intake or any other intake. So people making 1000-1200rwhp are wasting money on aftermarket intakes.
I never said you couldnt make power with an LS6 intake...
plenty of people make lots of power on them....

but if you can improve airflow going in, and reduce restriction, reducing boost and heat...then you have room to make more power.

Last edited by soundengineer; May 11, 2014 at 06:37 PM.
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Old May 11, 2014 | 06:31 PM
  #29  
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Originally Posted by soundengineer
the simple test is to do a back to back on the dyno.....
with no other changes one of two things will happen...

either you will make more power with the same amount of boost
or you will make the same amount of power and see less boost(I mean measurement of restriction)
Yep that's my plan. I changed my turbo set from last year and ran the same mph (143) with 4lbs less boost. Went to a larger turbo, E85 and more timing.
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Old May 11, 2014 | 06:31 PM
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Originally Posted by soundengineer
I never said you couldnt make power with an LS6 intake...
plenty of people make lots of power on them....

but if you can improve airflow gong in, and reduce restriction, reducing boost and heat...then you have room to make more power.
I'm talking about stevie turbo.
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Old May 11, 2014 | 06:51 PM
  #31  
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Originally Posted by mike13
if your opinion holds true there's no need for anyone to even upgrade to a ls6 intake or any other intake. So people making 1000-1200rwhp are wasting money on aftermarket intakes.
No, it means exactly what I said. Sound engineers reference to a n/a test gaining 30hp with a different intake mean diddly squat when boosted.

And it depends how efficiently they are making that 1000hp, heads, engine size, power adder etc

But people have made 1000hp on standard LS6 intake and TB, and perhaps then some. It's just an already great design in the first place.

That doesnt mean some setups cannot be improved with other designs, it just means it works great, and has been proven to work great.

And as far as TB's go, that is not only common sense as I already described, but also fairly well proven
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Old May 11, 2014 | 07:54 PM
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Not a LS6 intake but I ran a 8.62 with a stock 78mm Throttle body and a Vic Jr and Aarons elbow
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Old May 13, 2014 | 07:17 PM
  #33  
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The stock LS6 on my boosted camaro and the stock LS2 intake on my boosted Buick T type work for me!
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