to remap or not to remap

[Nerd]

The map on an AUM is for all intents and purposes a detuned AUQ map! That is what I am saying- if it got remapped it's stage 1 would in essence be identical to an AUQ stage 1! But advising not to run at AUQ power levels because India is alot more humid and hot than Europe thus the suggestion of fitting a larger FMIC and one with a fan mount if possible before even thinking about increasing it's power

[BrownBarge]

An AUM stage 1 is the same as the AUQ stage 1 200+ bhp. I think your going ever so slighty over the top with fan assisted intercoolers. Im sure if theres any decent tuners out in india then they can advise him abit better then some know-it-all on a forum.

[Sprucegoose]

IF you;re on good speaking terms with any tuners they might be able to flash a stock map for you but like kentphil says, it's not quite as simple as there being 1 stock map. They're running a detuned map for a reason on the Indian spec one, hot intake temps seriously drop power and increasing the power just to 180 without an uprated FMIC may be damaging a lot of things. Same with turbo cars out in the Middle East, they're all detuned and there's garages out there who put charge coolers on for people and remap the vehicle as an option from the dealership. Heat is a turbo's worst enemy- if it's going into the turbo hot it then just gets hotter as it's compressed and then from heatsoak so ends up red hot as it enters the engine as that little SMIC really won't be able to drop the temp enough. You don;t need a giant sized intercooler or anything just one mounted with good air flow and in the case of pretty hot ambient temps. one where you can fit a fan to the rear of it for when the car is idling

 

The tuner is a very close friend of mine, so that won't be a problem. And I'm getting quite a Large Front Mounted Intercooler. Will be mounting it in front of the radiator. Hopefully the radiator fan will help cool it when idling.

 

Also on a lot of standard maps, a well masked boost surge condition exists in certain firmwares on the ecu, which as soon as they are mapped by some less capable tuners end up in a right pile of undriveable mess. It may look like a cheap option, but it might open a world of pain with your average intake temperatures out there as Nerd has eluded to.

 

What is a boost surge condition?

As for a proper remap, I don't have any personal experience, but a friend is driving a Stage 2 remapped vRS and swears by it.

The only problem he has is that his coil packs have failed twice. 

 

Nerd, the OP's car is not running a "detuned" map. His car has a different engine to ours. His aum engine has 150bhp in india and in the uk.

 

What is the difference between and AUM and AUQ engine?

Can I run an AUQ map on an AUM engine?

[Nerd]

Have you ever worked on and raced cars in a hot country have Brown Barge? I have and that's what's used- ambient temperatures are terrible and AC is almost always on as a result. No fan, car parked idling with AC on = seriously hot engine- that's why I suggested it!

[Nerd]

Sprucegoose- I mentioned it earlier- they're basically identical engines but running different maps from the factory thus one outputs 150bhp (maybe less in India as heat will sap power) and the other 180bhp. IF you do get it remapped you need to get it done by someone who knows the engine well, they're a very common engine now and I would expect there to be some specialised tuners near you. YOur problem is always going to be heat which is why I keep banging on about getting a decent intercooler and I would also imagine the problem with your friends coilpacks are to do with heat as well- higher power means higher temperatures and when the intake air can't drop below about 35degC constantly it's a big strain on the engine

[Nerd]

I'm surprised a lot of modifiers aren't running water injection to try and keep temps down out there TBH

[BrownBarge]

Racing cars and road cars are a world apart.

[Nerd]

Have you any experience of tuning a car (any car at all) in temperatures where ambient air temps are between 30 and 50 degC with humidity ranging from 50-99% ?

[Nerd]

Sprucegoose- forget to answer your question about the boost surging. WHat happens with some remappers is they take the factory map and simply adjust levels within the map by a percentage across the range. What this does is accentuate any problems in the factory map. In this case small boost surges or spikes. WHen running at factory power these surges may not be really noticeable but when they go and simply increase levels across the board it makes these surges much much more pronounced. A well experienced tuner doesn't do this and over time will have developed a good map from scratch using AFR's with a nicely shaped power curve himself- one without any boost surges present as it's a totally different map from the factory one. These maps are very smooth and seriously completely change how the car drives as the power is delivered so much better

[BrownBarge]

Nope but im merely pointing out that a tuner in india who knows the engine and what hes doing will be able to advise him better on his options. Hes not mentioned that hes racing his car so im not entirely sure why you bought it up? I know hes going to end up with reduced power with the heat, its the same in the UK in summer. If his tuner is any good he will of already been advised of all this.

[Nerd]

Brown Barge - Do you understand that by remapping an engine in high temperatures that you're putting the same stress on it as if it were on a track? I'm not telling him HOW to tune it, I'm NOT telling him an exact course of action, I'm giving him advice on things to watch out for and things I would personally do

 

Yeah mate- a UK Summer is just like that lol

Edited 30 January, 2014 by Nerd

[kentphil1]

Sprucegoose, I would not worry that the intercooler is kept cool at idle, its main function is to cool the air charge under boost conditions to get the best efficiency from the fuel/air charge. This is usually achieved by dissipating the heat to the air the car is moving through.

 

I also want to be clear I was not in any way saying that your friend would not be capable of sorting this, just that the standard map on an auq has faults that will affect the base product..If he is as capable as you say, there should be no problem. As has already been said, local country knowledge counts for an awful lot.

[BrownBarge]

I understand how remapping engines work but with the correct supporting bits his tuner should be able to make it safe for him with whats provided and if he cant, he needs a new mapper.

[Nerd]

3/4's of mappers just dump a generic file on the ECU without any thought of specific mods when it's a stage 1 and then wonder when people aren't happy. He's here for advice, I'm giving him advice on exactly I would do in his situation to get his engine running as well as it can. He already has an FMIC to go on, I suggested possibly fitting a fan to keep things cooler at idle. Note the word possibly fit? I suggested this as when it;s hot you can get a huge lag in power if you;re engines been idle and the temps have gone right up and can take an intercooler in hot air a good 10 minutes to get the temps back to where they should be. THis is what I would do. it' is by no means necessary but something that I would do over the cost of a fan and mount

[BrownBarge]

Ok, i can see where this is going, you have to have the last word on everything. I will leave you to google everything 1.8t and tuning. Have fun

[Nerd]

Yeah, of course I googling for answers, it's impossible to use my own common sense, knowledge and experience to come up with an answer. I'll leave the blind googling to you mate if that's ok

[eggessford]

If u read the first post, The op is fitting a fmic as one of his first modifications. Careful brownbarge this guy knows everything. He has a website don't u know so he must be all knowing

[Nerd]

Ah, the witty troll- welcome mate. Did he really say that? Wow! I did not read that part! Fantastic stuff and big well done for pointing that already quoted fact out to me...thanks so much

 

I must be all knowing, I own a website- ah, bless ya cotton socks. Owning MM doesn't make me an expert but having an HND in Marine Engineering most likely makes me more of an expert than you and TBH that's all that counts. But hey, go ahead and keep recommending people do risky crap to their motors because 'it's not rocket science' as you so poetically put it.

 

Bodge your own motor, do what you want to it but don't tell people to bodge their own...simples

[eggessford]

Ha ha ha couldn't resist. My motor is holding together well for a 'bodge' thanks need you have made me laugh once again

[Nerd]

My undying pleasure. I'll wait for the pop and no doubt hear it up here in Newcastle

Edited 30 January, 2014 by Nerd

[kentphil1]

And ............breathe ................

[Nerd]

lol

[Sprucegoose]

Thanks alot guys,

 

Ambient temperature in the summer in India does get really [censored] hot.

In the afternoons it generally crosses the 45 Degree Celcius mark with really high humidity.

You can't live without the AC.

 

Right now in Jan [an Indian Winter] at 3:00 PM its already around 32 Degrees in the shade.

 

Out here, tuners generally advise against water injection. they say it's not worth the effort or money.

Besides the regular fuel in India is 88 Octane. and the Premium Petrol is 91 or 93 Octane.

 

Their logic is if they had good enough fuel, then they would do water injection and stuff.

[Nerd]

That is pretty low octane fuel but I guess the lower octane will stop the engine's too hot and might well be one of the reasons they used the AUM instead of the AUQ as the AUQ asks to be run on 98 RON.

 

So where in India are you then? Been a long time since I was over, last time was I just in Mumbai for business so wore ear defenders to stop the noise from the car and truck horns deafening me lol. But spent some time in Kerala up in Outti at a friends hotel they converted from an old hill fort- beautiful place

[Sprucegoose]

I'm from Mumbai.

and now it's louder and more crowded than it's ever been.

 

Kerala is a beautiful place. God's own country as they call it.

 

We've got a lot of Stage 1 & 2 remapped vRS's here and they run on 93 Octane fuel just fine.

A friend of mine has a stage 2 and he was telling me that with my FMIC, Airfilter and FFE if I do a stage 2 remap, i'll be churning out around 220 to 240 WHP.

and here a Stage 2 remap is marginally more expensive than a Stage 1 Remap.

 

but then i'll need to get uprated brakes and suspension as well, which are REALLY expensive.