Ginge !

on scoobynet theres a " tuner" whos saying that a car with a FMIC will NEED as remap otherwise it will melt due to air density

if the cars set the same boost level and fueling is checked,,,,,, why would it need a remap ??

do people not get that factory ECU's adjust the ignition/fuel based on the temp infomation it recives and its only when you CHANGE the settings that it needs to be sorted

the lower ACT's..... at the same boost would mean that in the winter when the air is denser the car will melt no ???,,,,, even though its COLDER in the engine,,,, which is the bit i DONT get

Jim Galbally

i agree ginge, it is air temerature corrected.

i could see it making a difference if it affects the airflow with the different pipework etc. but doubtful

Ginge !

jim airflow is a thought,,,,, but still if the boost is the same on a standard engine then surely its still gonna be safer than taking the car to a unknown mapper for a tweeked chip that MOST tuners seem to prefer ( or not tweeked if you ex montune )

factory ecu with a new intercooler,,,, flowing a little more ( doubt it will be LOADS more or its a shite i/c i guess )

reason i wonder is im running a mines ECU,,, its not even the right fueling technically and ive not melted the car yet,,,, so a factory ecu at the same boost,,, would that not be safer ?

Markb_s1

FPMSL.... yeah, why do people talk so much crap?

Jim Galbally

ginge, one this that's DEFINATELY true is that YOUR car needs to be at LEAST checked over in it's current state, PLEASE visit a tuner

_DAN_

Dunno Ginge, why do they?

Stavros

Ive seen plenty of cars die due to fueling changes just due to full exhaust or intercooler changes.

Steven_RW

The subject title of this thread is hilariously ironic...

Anyway.

Who is to say that the car won't run more boost with the more efficient intercooler, and that would upset the map or go beyond its current sttings?

When it comes to turbo cars I would want to check it for det with every change carried out.

RW

foreigneRS

an impreza has an air flow meter doesn't it?

Ginge !

steve its that NOT a car thats been set up after though ?

on a factory ECU also not a remapped ecu ?

standard boost with a FMIC ?

jim my car needs a new ecu as nothing can be done to it...... the fueling must be fine though as it has been tested a few times, checking the fueling is a idea,,,,, but as theres fuck all that can be done due to the mines ecu its a little pointless IMO

Ginge !

yeah but thats before the turbo

flow is the only part i can see,,,, but on a factory ECU with standard boost, would a remap be NEEDED ?

would it always be safer also ?

JonnyBravo

Yes, so surely its going to deal with the changes ?

Porkie

iTrader: (1)

1000000000000000000000% agree!

Ginge !

would flow always be the same before and after the turbo,,,, in theory yes,,,, but not sure about it 100%

in theory is should be hence they fit one too it

foreigneRS

so mass flow before a turbo can be different to after it can it?

RS 5tu

iTrader: (2)

the lower ACT's..... at the same boost would mean that in the winter when the air is denser the car will melt no ???,,,,, even though its COLDER in the engine,,,, which is the bit i DONT get[/quote]

Thats what i was thinking you would have to remap depending on the weather Surely the ecu would sort it on it own any way??

Ginge !

not sure as ive never tested that,,,,, in theory it should be the same,,, but not sure on it

guess its comon sense answer though,,,, PS: does that mean i can relocate mine as i need the space where it is on mine for a " mod" ive got planned

so a maf sensor is a good idea then or does faulty ones cause MORE of a issue hence not every car has one ?

Chip

iTrader: (3)

Different intake restrictions mean the turbo has to spool to a different speed to get to the same mass air flow situation as before, this means a difference in exhaust gas flow as well, which could lead to a change in the engines timing requirements.

Perfectly reasonable to say therefore its good practice to remap it, so im not sure what your issue is?

That said, the effect is likely to be minimal and in most cases with an AFM there will be enough room to manouvre to get away with it IME, but as everyone says, it would be silly to not at least check it over!

Ginge !

chip its not checking it over,,, theres a bloke whos confused,,,,, ( i dont help i guess ) and hes been told he NEEDS a remap or the engine could melt due to the LOWER temp denser air

im sure a standard ecu is safer than some " remapped " ecus's ive seen on peoples cars with stupid high CO levels ect

on a STANDARD CAR,,,, just a FMIC, standard boost,,,,, standard injectors

would a REMAP be needed ?

foreigneRS

mass flow is mass flow. it cannot change unless you have a leak. the volume flow changes depending on density (temperature), but the mass flow stays the same.

provided the maps and run programs are sophisticated enough, they should cope with a change like a FMIC. i'm not saying that they are sophisticated enough on a subaru of that age though, so maybe the 'tuner' knows that they are not and is giving good advice, i don't know.

Chip

iTrader: (3)

Is it a UK car?

Cause the imports can have problems even without even putting a front mount on there on our fuel, so certainly good practice to remap them when fitting one.

Ginge !

jap car is different chip based on the fuel issues anyway,,, that part i get as i have that issue on my motor

yes its a uk 2000 car

Chip

iTrader: (3)

PS

There is a flaw with det checking any car without remapping it.

The only proper way (imho) to det check a car, is to wind more advance on till it det's to see how many degrees from det you are, as if you just listen to a car on its current map all you can do is say "it doesnt det right now" but the thing is it might be only 1 degree away from doing so, and the slightest change (like slightly different fuel) could then push it past that limit if its so close.

Ginge !

please see other thread as this is VERY intersting and maybe just what i needed to hear !!!

StephTell

"why to some people talk so much crap"


That's rich, coming from you lol

Chip

iTrader: (3)

At first glance I assumed the post was going to be an autobiography

Jim Galbally

ginge, there is a point getting it checked really, its not hard or expensive either

Porkie

iTrader: (1)

VERY good!