TJ

iTrader: (10)

collector
one side of the y pipe
backside of the y pipe
before the muffler?

SweetS10V8

iTrader: (4)

Ive never done it, but I have always understood it to be one in front of and one behind the muffler since it is your restriction.

DaddySS

do you mean to check backpressure?

TJ

iTrader: (10)

yes.
thank you.

NHRAMAN

iTrader: (1)

WHY

jsteele90

iTrader: (13)

why would you want to do this?

SweetS10V8

iTrader: (4)

To see how much of a flow restriction your muffler is causing.

TJ

iTrader: (10)

thats the idea.
the exhaust is easy to drop, but a pain to get lined back up, so it makes it hard to do it at the track.
trying to decide if i want to keep what i have or go duals.
id at least like to know if its hindering me or not.

DaddySS

The back side of the y would give you the best reading, but if you want to take the readings again after you would want to take it from the collectors.

BTW, there are tools that mount in the AIR pump or O2 fittings, which might be the easiest approach.

TJ

iTrader: (10)

well how bout that.
glad i posted this thread. im going to search now, but do you have a link to such adapter?
i can pop it right in my 02 bung.

DaddySS

http://www.thefind.com/cars/info-exh...ressure-sensor

Red99TA

iTrader: (11)

I've never heard of this. How can it work since there's still a flowpath through the motor past the rings or past the exhaust valves that are open and out the throttlebody. I mean the TB will be shut but there's still flow through the hole in it. I would think you need the flowpath up the exhaust towards the motor sealed to make it more accurate.

edit - nevermind, this is probably done with the motor running right?

DaddySS

You basically want to run the engine at wot up to your target RPM. I believe the target is 7PSI or less and for every 1 PSI above that figure about 5hp loss.