Noob question, do i Need to use a MAP sensor?

Discuss which Sensors work best with these ECUs and share how you are using inputs and outputs
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MX5-racer
Posts: 18
Joined: Mon Sep 16, 2013 9:52 am
ECU Model: S40 Pro

Noob question, do i Need to use a MAP sensor?

Post by MX5-racer »

Hi all, Im pretty new to using stand alone management so hope this is not a daft question. ive just bought a Mx5 mk1 that somebody has put on jenvey itbs with DTA s40 management. It does not run though. apparently it was running a year ago but has been stood since and now wont start, whilst checking everything through i was surprised not to find a MAP sensor. the only feedback the ecu seems to get is from the TPS and CPS and water temp. is this enough feedback for the car to work correctly and perform well? How does the ecu work out the load the engine is under to work out the ignition advance and fueling etc? any guidance appreciated.
Dave
stevieturbo
Posts: 3588
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: Noob question, do i Need to use a MAP sensor?

Post by stevieturbo »

You will use TPS vs RPM for load calculation, and temp etc

For a n/a setup you dont need a map sensor. Only time it may be useful, is for use as a baro sensor, if you expected to see big changes in atmospheric pressure. ie you travel over a wide range of altitudes.

Really not an issue in the UK.
MX5-racer
Posts: 18
Joined: Mon Sep 16, 2013 9:52 am
ECU Model: S40 Pro

Re: Noob question, do i Need to use a MAP sensor?

Post by MX5-racer »

Ok great. Thanks for that. That keeps things simple then.
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