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ARH 2" x3.5" Headers

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Old 11-19-2015, 08:09 AM
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Do any of you supercharger guys have video of your backpressure gauge while you're in the throttle? I'd be curious to see how its responding.
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Old 11-19-2015, 08:29 AM
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Originally Posted by Vortec350ss
Just because it's easier to measure lol
Ya, I only want to know the ID of the primaries where they open into the collector...lol....Is it still 2"?
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Old 11-19-2015, 08:33 AM
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I have a gauge for that
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Funny, I still haven't seen any pressure rise at all from my 402 on ~8lbs with 1 5/8" headers and dual 3" back to a single 4" with a big muffler. Maybe I pinched the line to the gauge...
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Old 11-19-2015, 09:30 AM
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Originally Posted by Atomic
Funny, I still haven't seen any pressure rise at all from my 402 on ~8lbs with 1 5/8" headers and dual 3" back to a single 4" with a big muffler. Maybe I pinched the line to the gauge...
Where was the gauge attached when you did it?
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Old 11-19-2015, 09:31 AM
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I have a gauge for that
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about 6" after the collector on the driver side
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Old 11-19-2015, 09:32 AM
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Originally Posted by Atomic
about 6" after the collector on the driver side
Put it upstream of the collector and see what happens.
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Old 11-19-2015, 09:34 AM
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Where are you guys putting them? Right at the collector?
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Old 11-19-2015, 10:10 AM
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Originally Posted by Atomic
Where are you guys putting them? Right at the collector?
I checked mine in the collector and in the mid pipes. Both were same size, readings were the same. At that time mine was restricted after mid pipes.

Most recent test I did in the collector (fwd 02 bung) and it was 0-.5

The needle bounces. With 1 5/8 primary what size are your collectors?

At the end of the day it's about what back pressure your exhaust valve sees anyway.
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Old 11-19-2015, 10:49 PM
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Originally Posted by smokeshow
Do any of you supercharger guys have video of your backpressure gauge while you're in the throttle? I'd be curious to see how its responding.
Yes sir, as soon as slow photobucket loads it, ill post it here .
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Old 11-19-2015, 10:52 PM
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Originally Posted by DrX
Ya, I only want to know the ID of the primaries where they open into the collector...lol....Is it still 2"?

Yes , The primaries are the same all the way from flange to the collector .
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