Best place to fit MAF sensor in 4BD1T for boost guage

**rar110** · 12th July 2010, 09:30 PM

Well the Auber boost guage and 4 bar MAF sensor arrived today. So the question is where to fit it? I have read fit it in hose btw wastegate actuator and supply side of turbo. However, this hose has a t piece in it already leading back to the tube btw air filter and turbo. I don't get the reason for this.

On the weekend I also fitted the boost controller btw the t-piece and actuator. The boost controller is set for min boost. However, the blow off valve is now going off regularly and much louder than before. Any advice on this would also be appreciated.

Thanks

**Dougal** · 13th July 2010, 05:45 AM

MAF or MAP sensor?

MAF is an airflow sensor that usually sits just after the aircleaner on EFI engines. MAP is a pressure sensor that usually is fitted to the intake manifold.

I'd ditch the blow off valve completely and leave your booost controller set on whatever is necessary to keep peak EGT's under control. From there your right foot provides boost control on demand.

**Blknight.aus** · 13th July 2010, 06:15 AM

the 4bd1 (t) is a mechanically injected engine so doesnt need a MAF or any other fancy electronical rice boy crud.

the best place for the MAF/MAP on a 4bd1 is in the bin.

Tombie · 13th July 2010, 09:43 AM

I think he means boost pressure sender!!!!

**rar110** · 13th July 2010, 09:58 AM

Originally Posted by Tombie2

I think he means boost pressure sender!!!!

Thanks Toomie, yes. Sorry for the confusion I thought it was known as MAF. It looks like the sender can go anywhere. The real question is where along the supply btw turbo and intake to take a boost measurement from.

**Dougal** · 13th July 2010, 10:06 AM

Originally Posted by rar110

Thanks Toomie, yes. Sorry for the confusion I thought it was known as MAF. It looks like the sender can go anywhere. The real question is where along the supply btw turbo and intake to take a boost measurement from.

I say intake manifold or close to it. That gives you the boost reading the engine sees.

**rar110** · 13th July 2010, 11:57 AM

Originally Posted by Dougal

I say intake manifold or close to it. That gives you the boost reading the engine sees.

I thought so. I was thinking about using the steel section immediately before the alloy manifold, and either welding a nut or drilling tapping a hole, then screwing in a barb for hose to attach back to the sensor.

**Dougal** · 13th July 2010, 12:08 PM

Originally Posted by rar110

I thought so. I was thinking about using the steel section immediately before the alloy manifold, and either welding a nut or drilling tapping a hole, then screwing in a barb for hose to attach back to the sensor.

I've just been welding a patch of steel to it thick enough to drill/tap and then threading in ports or plugs.

**Bearman** · 13th July 2010, 05:10 PM

Originally Posted by rar110

I thought so. I was thinking about using the steel section immediately before the alloy manifold, and either welding a nut or drilling tapping a hole, then screwing in a barb for hose to attach back to the sensor.

Thats where mine is Pete.

**rar110** · 13th July 2010, 07:56 PM

Originally Posted by Bearman

Thats where mine is Pete.

Thanks Brian that's good to know, a job for the weekend.

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