Mapping With An Extra Inch

What difference would it make if i stick with my Nur Spec, get the car mapped and then a few months down the line get the BL System?? Will i need to get the car mapped again??

yes matey you will, the fuelling is different.

Damn, i guess i just didn't really want to belive the turth

To be Honest, I doubt it would make much difference. They're both going to be free flow exhausts. OK so you may be able to squeeze another 2hp if you did get it re-mapped, but I can't see it could make any critical difference.

Obviously if you have the choice of getting it mapped after the exhaust is changed, that would be prefereble, but don't lose any sleep over it.

yes matey you will, the fuelling is different.

how did you work that one out?

If your changing from one type of free flow exhaust to another with no change in pipe size or removing a cat, it won't make enough difference to warrant a remap.

If you ever get a map that close to perfect? A 10 deg difference in ambient temp would make more difference than an exhaust.

yes matey you will, the fuelling is different.

http://www.mkivsupra.net/vbb/showthread.php?t=56993&page=7

post 98 onwards

Prefferably i'd like to get the mapping done after i get the exhaust, but im working on a budget and the thought that i'll get it AFTER getting her back on the road. I was just wondering if going from 3 to 4 inches will free up a bit more power to effect the ecu enough.

Thanks for the replies.

I changed from a Veiside 3" exhaust to a BL 4" version. No remap was needed. To suggest otherwise is bollox.

That's good news CJ

Mieow guy's!!

In Burt's defence this isn't in technical so any answer is valid

Mieow guy's!!

 

In Burt's defence this isn't in technical so any answer is valid

If you feel any answer out of tech is valid (despite it being totally incorrect) then I look forward to seeing how you react in future when anyone else does the same. Or are there different "Alex" rules for different turbo buyers - or types of turbos bought?

Some people put a lot of weight into answers they get from this forum, especially those with little knoledge of their cars.

If people guess or post up totally incorrect answers to valid questions this can lead to alsorts of problems from mild embaresment thru lost money to damaged parts.

I'm all for technical discusion between people that KNOW or at least have experience with the subject and questions from those that dont.

Posting up what your mate's mate once said down the pub just to increase your post count doent help anyone.

lol - I was only messing about. Don't think anyone would have the wrong answer after reading this thread.

Slap the non-technical b**ches!

how did you work that one out?

OOps.. thougt it read get it mapped when exhausdt fitted, then a few months later get the BL system fitted ie turbo..thats why i sad fuelling different.

my apologies.

Would a remap be required if the IC was changed ? For instance - a SMIC was replaced with a upgraded SMIC or even a FMIC ?

I only ask because .. wouldn't a uprated IC give lower temps ?

Changing the IC would not neccessitate a change in mapping. If that were the case then you would have to map for different climate conditions too i.e. summer daytime driving and night time winter driving.

my apologies.

Cool.

Most proper ECU's can "self learn". Piggybacks aren't quite so clever but with the stock ECU forever tweaking things they can handle changes in the weather and therefore changes in charge temperature.

Lets make a list of the changes that could force a re-map (copy and add to)

You'd only need a remap if you;

1) Changed the static fuel pressure

2) Changed the size of your injectors

3) Change the size of your turbo

4) Increased the boost pressure to beyond what has already been mapped for

5) Changed your capacity

6) Changed the compression ratio

7) Fitted WILD cams (mild shouldn't really require one but you could if you wanted)

Any more for any more?

1) Changed the static fuel pressure

2) Changed the size of your injectors

3) Change the size of your turbo

4) Increased the boost pressure to beyond what has already been mapped for

5) Changed your capacity

6) Changed the compression ratio

7) Fitted WILD cams (mild shouldn't really require one but you could if you wanted)

8)Changed fuel octane.

I would say that although most minor changes do not require a remap, ie exhaust etc if you had the ability to change the map with a programmable ECU i see no reason not to tweak it as you may find some small gains.

just my thought anyway

You wont need to remap it mate

You might just get slghtly better spooling up thats all

Just to clarify I am not saying you have to remap but as I like to play with my map I would prob do it just to see what could be gained.

Prob nothing but hey