barndogg

I see people talkign about remapping and down pipes?

Anyones help wouldbe much appreciated!

Thanks in advance.

alcazar

iTrader: (2)

A VERY broad topic.

Basically, the Scoob engine is controlled by an ECU, (electronic control unit), which has control of fuelling, ignition, boost pressure, etc etc.

With a few simple mods to the engine and exhaust, some clever folk are able to write new commands for the ecu, which increase the power output and torque.

Some Scoob engines can be remapped onto the existing ecu, some need a piggyback board tagged on, and some need, or benefit from, a completely new ecu. Depends what model you have.

The downpipe is the exhaust FROM the turbo back to the centre section. it contains a cat, and is restrictive. A new downpipe allows better gas flow, and so better power/torque.

HTH, Alcazar

barndogg

aaaaah ok.

I understand the basics of gas flow i think.

Can you change the down pipe urself?

Northern Nick

iTrader: (1)

Depends how good you are with spanners, its not difficult if you are compatent at nut and bolt work.

barndogg

Yeah i'm ok at spanner work.

Do yuou know of any online instruction pdf's?

Northern Nick

iTrader: (1)

I dont, know,

Its all as you see, just remember where it all came from

martiboy

Not sure if its any help but I did see free pdf's on here somewhere the other day for free.Unfortunatley cant remember where they were You would have to search for them.

frayz

iTrader: (7)

I wrote this a long long time ago...

Quote:

Originally Posted by EmEm

I shouldn't ask as I may start looking into modding.... but I would like to know about re-mapping and how it helps the car's performance etc. I know it can help fuel consumption, can't it?

I think my car has been chipped, but God knows what with (it could be a McCain's Over Chip for all I know !!!)

Will the rolling road, in Feb, show alot about whats happening "in" my car as it were?




Okay.. the basics.


You car has an ECU (Electronic Control Unit)

This is the engines brain. In this brain there will be loads of tables, spreadsheets if you will. There is a speasd sheet for each of the enines parameters. ie fuel, boost, throttle opening, cylinder pressure, load etc etc etc.

With me so far?

Okay...

Basically the ECU reads these spreadsheets thousands of times a second. These spreadsheets tell the ECU what fuel/ign/bost to add at what time and for how long.

So there we have Mr ECU reading speadsheets and telling the engine what to do in order to work at its best efficency and make sure everything runs smoothly. Mr ECU is kind of like the conductor of a nice big band.. making sure everyone plays the right note at the right time.

Still with me?

Cool.

So now we come along and we Know that as our cars engine are basically a huge air pump and the more air we get in, the more we get out, the more power she makes.

So

We decide to change bits of the orchestra (exhaust, air filter turbo etc) to make the engine more efficient.

HOWEVER!!

Mr ECU is still reading the old spreadsheets and is wondering why his orchestra doesnt sound quite right.

He needs a remap.

So along we come with or remapping software to rewrite his spreedsheets so his orchestra now works to its best effiency again.

All the new parts are working properly and his music is louder than before.. (We have given him more power)

Is there anything there you still dont get and i can explain it better.

This is about as much as i can break it down lol

rigga

iTrader: (4)

Frayz......... quality that

frayz

iTrader: (7)

Reading it now, what on earth was i thinking PMSL

weeebell

iTrader: (1)

Also, I know from experience, if you break a string on the third violin from the left, thats error code 23 and is the MAF sensor.

frayz

iTrader: (7)

Ha ha ha ha, what have i let myself in for. Go on then.

Let the **** taking comence

stevebt

iTrader: (8)

Have you read the thread ??
Explain mapping

rigga

iTrader: (4)

If the big double base plays up is that when it gets very expensive??

Northern Nick

iTrader: (1)

Yes mate I did

stevebt

iTrader: (8)

I,m pissed and just making fun

barndogg

Frayz man, that is brilliant.

So basically you would only want to remap if you have made modifications to the exhaust or turbo etc?

or if you remap the ecu without modding will it still have an effect?

rigga

iTrader: (4)

It would but the effect would be greater if say the exhaust was decatted,inlet system was changed,turbo was upgraded....... cars come with a generic map that must be suitable for all,and take into account variences in the build of the engine and its componants,two identical cars built after each other might not be exactly the same,so the map will be on the safe side to account for this,so remapping the ecu would gain some benefits in standard trim,allbeit small...... change some parts and the improvment increases,with the cost of the map change its more economic to do it with some changes to the exhaust at least to improve flow,basic thing is to set out what you would like to improve and then map it the once to control costs.

barndogg

That makes a whole load of sense. thanks.

alcazar

iTrader: (2)

What no-one has yet told you is that modding is like a drug. Once you start, you're constantly wondering what your next fix, (project) will be. And BOY, does it get expensive!

For example, if you have a pre 99 UK classic, don't even think of a remap until you've sorted the awful 2-pot front brakes.

And doing THAT usually means bigger wheels all round.

Which makes the rear discs look puny..........

Then lots of people fit gauges, Knock Links, Lamda Links etc to tell what the engine is doing , and all this BEFORE the map, new ecu, whatever.

Alcazar

Northern Nick

iTrader: (1)

I thought everybody had heard of the drug "SPEED", its in the public eye enough. How it makes you loose wieght is due to having no money left for food.