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GrantTuscan

3 Bar Map Sensor

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Assuming it's a standard unit, you can get them from Demon Tweeks in the UK. They used to fit them to Sierra and Escort Cosworths a lot.

I've got one on my Esprit and it works a treat.. although mine is a 4 cylinder using an Emerald systems ECU :)

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Hi Grant,

The stock one is a 2 bar abs. sensor. Just replacing it with a 3 bar abs. one will cause nothing but wrong data and the ECU will calculate ALL engine parametres (ignition, fuelling .....) wrong !

Both are 5 Volt sensors and will give you totally wrong (1 bar too low) data.

Cheers

Marcus

Any ideas guys?

Thanks,

Grant


Marcus

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Any ideas guys?

Thanks,

Grant

Grant,

The 2 bar sensor is just a standard GM Map sensor, finding a GM 3 bar should not be a problem. Not sure how you are intending to modify the ECU to have it make any sense of the new signal though.

I use a product called MAP-ECU http://www.mapecu.com/ . It is just a piggyback unit with a built in 3bar sensor. Basically, it uses the signal from its own three bar to send a signal to the stock ECU. The nice thing is that you can remap this signal so it is in the range that the ECU needs to see. It has a nice "learning" feature where you leave the car running off of the 2Bar sensor and the MAP-ECU is creating a 3-D map of the voltage signal the ECU is expecting in relation to the manifold pressure. Once this map is built you can switch to running from the 3 bar sensor and make fine-tuning changes from there instead of starting from scratch with a full fresh tune. You might have a bit of trouble finding one, but mine was under $400 US, which seemed like an exceptionally good deal compared to the popular 2-D piggyback garbage you see in many imports.

Good Luck,

Rod


Rod

98 Esprit V8

Dynamic Racing Turbos

Water Injection

Factory Red ECU

3 bar MAP piggyback

Straight-through exhaust

TurboXS BOVs

Blitz I-color boost control + Wide-band AFR

Porsche/Getrag G50/52 Transmission (...coming soon someday)

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