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.

 

Ya, I only want to know the ID of the primaries where they open into the collector...lol....Is it still 2"?

 

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?

 

about 6" after the collector on the driver side

 

Put it upstream of the collector and see what happens.

 

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.

 

Yes sir, as soon as slow photobucket loads it, ill post it here .

 

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