Pressure port location

Larry Roberts · Jan 21, 2015

Can I put the pressure port anywhere in the pipe ? I've been told to put it at the largest portion of the pipe but I have gotten used pipes with the port four inches or so from header end, does it matter ?pressure is pressure right?

brad nichols · Jan 21, 2015

Most people put it at the center of the large diameter.

Brad

Ray Sametz · Jan 21, 2015

My understanding is the most pressure is at the fattest part of the pipe. OMHO

Hydro Junkie · Jan 21, 2015

It would make sense that the largest part of the pipe would have the highest pressure since you have the exhaust wave headed out from the header and the return wave from the convergent cone both hitting this area with an almost continuous pressure. To go very far away from that area would give less of one or the other, in theory at least

TUNLBOTR · Jan 27, 2015

Back years ago Ernie LaFleur would pressure tap the header coming off the case. US1, it was a .21 outboard, but it worked for him. What they said works for me on pipe.

RP

Ray Sametz · Jan 27, 2015

TUNLBOTR said:
Back years ago Ernie LaFleur would pressure tap the header coming off the case. US1, it was a .21 outboard, but it worked for him. What they said works for me on pipe.

RP

Yup.even pressure tapped case when we ran the 707 throttle exhaust and venturi on 21 outboards.

Grimracer · Jan 27, 2015

One finger width (about 1/2") in front of the widest part of the pipe (the weld)

Grim

Pressure port location

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