gixer_1000

iTrader: (1)

anyone know if you need both a tps and a map sensor for a turbo application with megasquirt ecu.
ive read you need something that senses engine load and wondered if only the map sensor would do this, and what the tps is needed for

cheers

Mark V8

iTrader: (2)

TPS is used for acceleration enrichment fueling and map for the load, you really need a air temp sensor and coolant temp sensor to do the job right.

Mark

gixer_1000

iTrader: (1)

cheers mark, i know about the the other sensors its just the load sensing etc. im confused with.
so i take it : load = when driving the car
and : acceleration = car basically still and reving the engine

or im i still getting confused.....?

series_one_rst

you need both mate. well id imagine so. however you select one of them for the acceleration enrichments. have you read the online manual?

rich123

iTrader: (3)

megasquirt has a built in map sensor and you do need tps air and coolent

Karlos G

iTrader: (4)

Yes you are confused! lol
Any time you press the accelerator pedal the engine takes a big gulp of air, if you do not give it enough fuel to match this the car will 'hang' for a second and jerk as it will be lean.
You use the TPS to tell the ECU that you have pressed the pedal and how fast/far you have pressed it, the ECU then gives the correct amount of fuel to prevent the 'hang'.
NA applications can use the MAP sensor to sense the throttle being opened (MAP increases) but for turbo'd applications the MAP can vary too much on boost and your AE will be cutting in when it should'nt be

gixer_1000

iTrader: (1)

thanks lads,
i see i still need to do some more reading up on the mega manual

series_one_rst

there's a lot to take in mate. lol! I get info overload when I start reading it, and I've been a technician for 15 years (hgv). there's some easier to digest guides on www.extraefi. co.uk. worth a look.

gixer_1000

iTrader: (1)

exactly the site im on at the minute mate.
good drawings on there.

it seems you could spend half your life learning about megasquirt, but its very interesting stuff.

Mark V8

iTrader: (2)

What are you planning on squirting ?

I fitted it to my motorbike a few years back and the sheer amount of info available gave me a few head aches!

Mark

gixer_1000

iTrader: (1)

ive a mk1 focus zetec that i would like to convert,

just a cheapish turbo conversion when time/funds allow.

series_one_rst

there should be a couple base maps knocking about for zetecs but I wouldn't use them as gospel. I'm gonna start from scratch with mine. the hardest thing I'm finding is the spark maps. fueling Seems fairly straight forward. oh and the idle pwm is a shit too.

tabetha

Turbo obviously you need a map sensor, ecu or seperate, and tps otherwise on n/a it can be mapped purely on tps and cts, for racing etc, not nice for a road car.
In short use any sensors you have input for for a better drive.
tabetha

JohnnyB

MS is has a built in MAP sensor, use the existing TPS, then Calibrate AIR TEMP Sensor and COOLANT TEMP sensor.

Then map the Mofo, when I MSed my 24v Sierra, I found a old ecu, cut the connector out, and made a loom.


This is it when I sold it

rich123

iTrader: (3)

have a word with dale at baileyperformance hes got a load of diffrent mapps for difrent engines and that and he's spot on,mapped mine for me in a day

series_one_rst

how much the map knock you back mate. was looking at them to maybe do the finalising of mine once i got it so far. see how i get on first.