HOW to bypass MAP sensor so it doesnt see boost??

[bkn_computers]

installed in between throttle body and map sensor? check valves? you mean valve or valves? i only need one dont i? just to restrict the vacuum flow to the MAP correct?

[saxman]

I've always seen it done like this



multiple valves are used to ensure boost is really being bled off... also make sure they can blow the air out of the line, not suck it back in. wouldn't want the valves installed backwards

[bkn_computers]

yep i had that exact setup too. didnt work too well.

[saxman]

were you using multiple valves?

what do you mean by it wasn't working too well?

[bkn_computers]

very unstable idling, up and down, up and down. i had 3 valves like the pic. also tried one. several ways, didnt work.

[saxman]

sound like you had a vacuum leak somewhere. did you try blowing through the valves yoursef to make sure they were all working properly?

[AusS2000]

Whereas it's best to use a proper ECU your next best alternative would be to use an electronic boost signal hider with a rising rate regulator. This device takes the signal from the MAP and passes it to the ECU but limits it to a max value. It 'caps' the signal.

Comptech make the ESM
http://www.comptechusa.com/store/med...SM-NEW2005.pdf

Vortech use the Split Second VC1
http://www.splitsec.com/products/vc1/vc1ds.htm

I'm sure there are other local and cheaper alternatives but I'm not aware of them.

[Weq]

a trip to jaycar and im sure someone will u will be able to make a circut which limits voltage to 2.95v.

[saxman]

does the exact same thing as this, only electronically versus mechanically

Spending more money to do the same crappy job is pointless... spend the money on a real engine management. Don't go throwing more money at a horrible solution.