Originally Posted by Irvatron

Interesting.

It was probably me who you mentioned made a cable for the o2 sensor from the UK , but would it hell read the correct values from my UEGO o2 sensor - i think its the way the uego output voltage unlike linear o2 sensors.

Be careful with timing, probably be best doing it on a dyno however...Are you saying you retarding timing in WOT low down in the rev range? if so that makes sense to retard it somewhat since on your setup you'll be making small amounts of boost low down. Very roughly (every car is different) its -1deg per 1 psi of boost.

Remember we have to stock ECU in the loop too and it babysits you somewhat/hinders you, IIRC in WOT the stock ECU will begin to pull timing when (IAT temps) =>45 celcius in WOT, i forget how many degrees but it increases with IAT temps.



Can someone tell me if their greddy pressure sensor flucuates (not a lot) in WOT particularly in vtec???

Could someone also tell me what the GEMU reports back at the redline RPM on an AP1??? - mines seems to say 87XXrpm

It appears the stock map sensor fluctautes quite a lot more than a greddy pressure sensor in WOT - which is why at your boost levels you should change it.

Originally Posted by neptuner

I found that I could eliminate most of the OEM MAP fluctuations by putting a dampener in the line leading to the MAP sensor. I used an inline fuel filter for the MAP dampener. Cost only $4 and works great. I logged the MAP output many times with and without the dampener and would estimate that it removes 90% of the fluctuation, even at WOT.