hello all as some of you no my fiesta is nearley on the road (nearley ,lol)

ive just finished fitting my go-tech mfi ecu and loom as i changed from megasquirt, the go-tech was mapped on a a focous rs with 750cc injectors. my injectors are 350cc and its a zetec turbo i no clearly the map is going to be compleatly unsuted to my spec but ive used it to get it up and running ive as i expected it was running lean so i richened it up a bit and got it to idal and my afr's are between 14-15 and my rpm is 900 but it just sounds rough

should i try opning the throttle a bit more and leaning it off or shutting it a bit ect im a bit lost now lol

i have never maped a car befor but im all ways looking into it. so i thort the best way was to have a go

 

clark i`ve seen this car get built from scratch scrap it now not worth it hahahaha only joking cant wait to see it running

 

speak to jaycos as he maps hes own car and learnt himself too

hes a nice bloke too even if he does like wearing vests

 

first post bigs not bad lol welcum to a proper forum lol

 

lol thanks mate

 

Clarke, what ignition values are you using at idle?

 

i had a quick look and from what my crap memory recalls about 10-12 btdc

 

dave walker's mapping book has a good section on this kinda thing, worth a read IMHO.

 

Sounds about right, although if its low comp you might want a couple of more degrees, have you checked with a timing light that its actually getting that amount?

 

ive got that book lol

 

Read it then

 

no i havent mite have to pop to work today and grab my light.

 

What CR are you clarkey?

10-12 tends to work well in the 8-9 : 1 region IME, if you are low comp though you might want a few more degrees than that.

 

words are not my strong point but ill gave it ago

 

im 7.5:1 what should i ramp it up to? or should i ramp it up and see what happens lol

 

Do you want me to come round and read it to you as a bedtime story?

 

Yeah I would try increasing it a few degrees then mate.

Try 14, see if it sounds happier, you wont kill it at idle even if you do get it wrong.

you may find that it raises the idle slightly as a result too, even on the same side amount of airflow.

 

and the big bad wolf said to the sparkplug im going to huff and puff and blow out your spark

and they all live mapperly every after

 

And Mr turbo said, I'll huff and I'll puff and I'll blow your house down

 

ive been told i can run and engine at idal lean enouth till it cuts out with out damaging it. not that im going to try of corse so its going to be a case of fiddling with the idal screw and ignition till i get it right lol

 

Clarke - Ill pop over later if your doing it today?

BTW, your engine WONT be as low 7.5 from memory if your using LET pistons.

 

Its not exactly rocket science, you only essentially have those 3 things you can control, so if you cant get that bit right, at least you will have learned that mapping isnt for you

 

realy? dam memory what will it be around? spose i should have realy checked this when building

 

the only way im going to learn tho is but having ago wud you not agree? probaly should use a cheeper engine tho but im only looking at light throttle loads atm the positive boost side of things ill leave to some one else i no

 

PMSL @ not having a clue what your CR is, these things should be measured not guess at

Fingers crossed this doesnt end up for you how it deserves to


And yes I agree totally, get stuck in and have a go is the best way to learn

 

yea i no i should have checked this how it deserves to ive spent ages building this i dont deserve to break it

 

when mapping try and find a pattern, map the bottom line first, so no boost just foot on the throttle and hold it at different mapping points,

when you have the first mapping point perfect, look at the next one, it is going to need more fuel obviously so give it some more, then take the engine revs to the next point and adjust fuelling untill its correct

now you can see the jump between them two points, its going to be similar all the way along so add the differece on top of the next point (for a rough estimate), just keep working your way along untill you have all the off boost point nice.

mapping in car is difficult, its much easier on a dyno as you can hold the revs and boost at any point for however long you need, but its not the cheapest way unfortunately !

 

mine was down near that with let pistons and a head skim

 

is that gearbox sorted yet ?

 

only really done a few niggly bits today tbh, then went to clarkes. i think its ok but need to get a linkage on as mullgrips ain the answer lol

 

does it start though now and not stall !!!!

 

Nearly....

 

Paul, im probably free tuesday evening by the looks of it if you want a hand with some mapping and its up and running (and got gears, lol) by then.

EDIT : Arse, wrong fucking thread, lol, that was meant for "rst in progress"

 

Don't know anything about go-tec but with Emerald you can scale the whole map to allow for different injectors to save starting from scratch.

Is there not a feature on go-tech to do this ?

Mark

 

that would be awsome mate, was dreading trying to make it there as i havnt got a wideband in to check what its doing atm (i know its stupidly rich tho and wet lol, jay was going to load his emerald software and talk me through reducing the injector table. cant wait for it to be driving again (hopefully for the weekend ) i do believe i have all gears now but need to get a linkage of my mates car to borrow , cheers mate

 

Text me later and remind me that I need to be taking my wideband away with me when I leave somerset mate, as Im pretty forgetful

 

will do, il set a reminder, put it in the car now you lazy git . what time do you want reminding? (id prob txt you after you've left otherwise lol)

 

yea my mates ecu you can but i dont think i can on my go-tech

 

found this threed so thort i mite as well up date it since i started this threed i just pushed my fez to one side but i pulled it out the other weekend and had a play. it terns out my gotech is broken alltho i bort it under the inpression that it was fine it terns out that one of the coil drivers is broken

so my electrition took it apart and we used one of the spair drivers that is normaly used when running 6 cilinders and swaped them over............

still no luck tho its the ecu its self not firing the driver any one selling a go-tech mfi pro (should have stuck with megasquirt lol)

 

clarke, why did you swop from megasquirt? im in the middle of choosing a system for my zvh build but i really dont know which one to go for

any advice woudl be great mate