180 remap, where and worth it?

[Quadcam24]

i self fitted a nitrous kit to my 180, it was a wet kit from wizards of nos, which is much safer than the old dry kits, and i never had any problems. You get real big gains which are very obvious.
This is another reason i know re maps are worth next to nothing, because if you fit even a small 25 bhp shot of nos the gains are instantly grin inducing and you suddenly feel like your driving a porsche, this is nothing like when you have had a re-map, when the best you can say is " it feels like it picks up a bit better".


ive known umpteen zs run with mods but no remap and reliability was never compromised, having said that, to back up something stamford said, it seems a fair few zs run a bit lean at the top end when they have had some mods done, so if the afr can be tweeked it can't be a bad thing and will gain you a couple of ponies as an added bonus.

[Quadcam24]

Originally Posted by stamford

The Siemens ecu can only learn a small amount and doesn't have the ability to advance the timing, only to retard it. It can change the fuelling by a small amount to allow for changing weather conditions.

The remap can go beyond this and advance the timing and the AFR until such point you can't go beyond the parameters within the stock ecu.

i always thought this till a conversation with george a few years back.
Him and ross had taken the supercharger off ross's car then both went in their own zs's to santa pod, georges car was standard, ross's car was now standard because the sc had been removed. They did some side by sides on the way to pod and ross's car was noticeably quicker, being able to pull on georges car every time, which also showed in the times at pod, where ross proceeded to set a time that was incredible for a standard car whilst georges just did what was expected.
Both ross and george told me it was because the car was running massive advance in the timing from having the charger just removed.
Now i dont know one way or the other, but how do you explain it otherwise ?

[stamford]

Well that I cannot answer Dave or even try to!

[zsserbia]

Originally Posted by Quadcam24

i always thought this till a conversation with george a few years back.
Him and ross had taken the supercharger off ross's car then both went in their own zs's to santa pod, georges car was standard, ross's car was now standard because the sc had been removed. They did some side by sides on the way to pod and ross's car was noticeably quicker, being able to pull on georges car every time, which also showed in the times at pod, where ross proceeded to set a time that was incredible for a standard car whilst georges just did what was expected.
Both ross and george told me it was because the car was running massive advance in the timing from having the charger just removed.
Now i dont know one way or the other, but how do you explain it otherwise ?

It makes some sense if it was remaped with the charger on, leaving a big advance setup to add more fuel. After removing the charger it would still take 20 miles or so to re-learn/retard it... What it doesn't make sense to me is why the performance was better, there was less air to burn additional fuel, right?

A guy that did the belts on my derv said that there was a big timing advance on the pump and advised he should put it back to standard/factory spec. At first the ride wasn't so good and the injectors were ticking a lot. I complained but he explained I should give it a chance for the ecu to re-learn the timing. Upon 20 miles or so there was such an improvement that I wasn't sure if there was a derv under the bonnet anymore! Been smooth ever since, especially after I cleaned the maf. It really sounds beautiful and I really wouldn't mess this now for a bit of performance...

[MG6Turbo]

DAVE you got that the wrong way round.

When the charger was removed Ross car was very slow as the ecu was retarded due to the charger. We wouldn't want it running too advanced as detonation would take place.

However after a couple of days Ross and I did the same runs side by side and this time his car pulled away from mine.

Regy ran a 14.9 std. This I ran after our rolling road recorded the power of that car as 175.9bhp. Totally std figure. I ran that time 4 times so it wasn't a fluke.

The ecu uses the 2 knock sensors to check for detonation. It allows the timing to be as advanced as much as possible and in line with its maximum parameters. Our remap used to increase those parameters in question and allow it to run more advanced but still using the knock sensors to retard if necessary.

G

[Maxxed_Ross]

Originally Posted by Quadcam24

Now i dont know one way or the other, but how do you explain it otherwise ?

Ross weighs half what George does

[Quadcam24]

aaah apologies for getting it wrong way round,lol !