which cars gain the most when remapped?

[R8VXF]

liner33 said:

Their dyno used to be quite optimistic though 10-15 % at least

but 15% optimistic at both pre and post mapping still shows that the mapping was effective

[ruggedscotty]

I have a 180 hp 2.7 TDI V6 A6

Had it remapped and the result was impressive - yes its not a ferrari and would never be one - afterall its no sports car.

Research indicated that the 2.7 was down tuned so as not to encroach on the 3.0 and that the 3.0 was itself limited due to issues with the torque limitations of the auto gearbox.

Taken out on a run before and then after the difference was pretty marked. It drove a lot better and felt that the mid range was a lot quicker.

Tank to tank fill ups also looked like the economy improved. Its not huge improvements but its improvements all the same.

It goes back to the factory map being generic to meet emissions and then to suit all climates and conditions. You can buy the car in Aussie run it across country in full on heat with poor fuel etc..... yes were not so demanding in terms of fuel and weather so there is some leaway in the mapping. leaning towards a more specailised map than a cover all.

[CorvetteConvert]

I don't know if this has already been said, but some of the '276 bhp' Japanese cars remapped to around 350 quite easily. But they may well have been higher from the factory as it was a figure used to get round the rules, as I understand it. Nissan Skyline was one such car.

[Scuffers]

R8VXF said:

liner33 said:

Their dyno used to be quite optimistic though 10-15 % at least

but 15% optimistic at both pre and post mapping still shows that the mapping was effective

be careful with assumptions like that.

Just because at one speed/power level it's X% optimistic does not mean at another speed/power level it will be the same %.

Most roller dyno's become more 'interesting' the more power you put on them.

[liner33]

R8VXF said:

but 15% optimistic at both pre and post mapping still shows that the mapping was effective

It gives you a rough idea for sure

[C.A.R.]

My old Peugeot 2.0 HDi was great in terms of proportional increase in power. Yes, it wasn't just a remap as I took the precaution of a freer flowing exhaust to extract a bit more power, but it went from a humble 90hp to 135hp, a very easily calculated 50% power increase. It didn't suddenly become unreliable either, I drove it for around 30,000 miles in that tune.

For me it was less about the peak figure (as impressive as that was) but the driveability factor. The map made power more progressive and the car more eager to rev than before. I'm not going to pretend it was the best thing ever, but it certainly made for an interesting shed for commuting.

[R8VXF]

Scuffers said:

R8VXF said:

liner33 said:

Their dyno used to be quite optimistic though 10-15 % at least

but 15% optimistic at both pre and post mapping still shows that the mapping was effective

be careful with assumptions like that.

Just because at one speed/power level it's X% optimistic does not mean at another speed/power level it will be the same %.

Most roller dyno's become more 'interesting' the more power you put on them.

Seriously, are you always such a muppet? I did not actually quote the numbers achieved, just that there was a difference with more power showing on two runs 5 minutes apart if you look at my original post. The bum dyno also confirms that there is more power. You are one of the people who, iirc, claim a chassis dyno is good for tuning only to show differences and here I am showing the differences without reference to the figures, just an offhand comment about the dyno in question. THERE IS MOOOAAAARRRRR POOOWWWWWAAAAAAAAA FOR fk SAKE!!!!!1111ONE!!!!!!!!!!!!!!!!

You just can't fking win either way it appears!

[ORD]

I think 90% of what people perceive is just altering the throttle map so that the same throttle input gives more fuel. Most people I know think that the 'sports' button in their car makes the engine more powerful or responsive, which is the same phenomenon.

[R8VXF]

ORD said:

I think 90% of what people perceive is just altering the throttle map so that the same throttle input gives more fuel. Most people I know think that the 'sports' button in their car makes the engine more powerful or responsive, which is the same phenomenon.

I am fairly sure I got scammed by a well known company in Southampton doing this on my Corsa many years ago.

[Scuffers]

R8VXF said:

Seriously, are you always such a muppet? I did not actually quote the numbers achieved, just that there was a difference with more power showing on two runs 5 minutes apart if you look at my original post. The bum dyno also confirms that there is more power. You are one of the people who, iirc, claim a chassis dyno is good for tuning only to show differences and here I am showing the differences without reference to the figures, just an offhand comment about the dyno in question. THERE IS MOOOAAAARRRRR POOOWWWWWAAAAAAAAA FOR fk SAKE!!!!!1111ONE!!!!!!!!!!!!!!!!

You just can't fking win either way it appears!

Calm down, your going to have a coronary!

[D'oh]

My Scirocco 2.0TSI gained roughly 50hp going by the before and after Dynapack result. Pic of the result below!



It really did make a huge difference to the driveability of the car , and you really do notice the extra lump of torque. No question at all on whether it was worth it or not!!

[C70R]

C.A.R. said:

My old Peugeot 2.0 HDi was great in terms of proportional increase in power. Yes, it wasn't just a remap as I took the precaution of a freer flowing exhaust to extract a bit more power, but it went from a humble 90hp to 135hp, a very easily calculated 50% power increase. It didn't suddenly become unreliable either, I drove it for around 30,000 miles in that tune.

For me it was less about the peak figure (as impressive as that was) but the driveability factor. The map made power more progressive and the car more eager to rev than before. I'm not going to pretend it was the best thing ever, but it certainly made for an interesting shed for commuting.

This is an excellent shout for this thread.
A friend had an otherwise cooking-spec 206 with this engine, and after a cheap remap it pulled incredibly strongly. A have a fairly vivid memory of us accelerating well up a hill with 4 people in the car, which would have absolutely stumped the so-called 'hot hatch' I was running at the time.

I harbour an odd desire to run one of the later 2.0 HDi estates (I think the design is incredibly well-resolved) with leather etc. as a snotter at some point.

[Big Performance]

700cc of smart 450 brabus. Stock 74bhp.

Mapped by me, then the customer had it run on a dyno independently.

It gave 108bhp...cant remember the Nm figures but a gain of 34bhp on a 700cc 2 valves per cylinder turbo engine is IMHO bloody good

[mmracing]

Recently : Nissan gtr did well as std with remap,then I got carried away exhaust,turbo's,injectors etc ruined the car,two new rs6's (v8 t/t) top hp figure was meaningless what really improved was midrage torque,it was epic.997 turbo s not much hp but again massive midrange, last one r8v10 plus: don't care what the figures say I can't honestly detect any difference in either outright hp or torque so that was a complete waste of money
So thats my point really : over the years I've owned some nice pieces of metal and in real terms i.e. what happens when you stick your foot in the carpet. .the biggest improvements are obviously from forced rather than natural aspiration. So how about asking a different question but on the same theme :-(its nearly xmas so be tolerant)
'What car gave the biggest improvement in fun after a re-map ?
The question is not as silly as it may seem if you really think about it.

[Colonial]

Mk6 Golf r.

Independent dyno 155kw at the wheels stock.

Off the shelf obd remap and an intake saw 188kw atw.

Happy enough with those results. And I add independent dyno payed for by myself as was more interested in AFR and boost spikes.

[jogger1976]

I believe Rica can map Euro 4 D5's up to 256bhp (185bhp standard) and 480 nm(370nm standard). Should be impressive, as midrange is already good, even in the Euro 3 165bhp D5's.

[Bonefish Blues]

jogger1976 said:

I believe Rica can map Euro 4 D5's up to 256bhp (185bhp standard) and 480 nm(370nm standard). Should be impressive, as midrange is already good, even in the Euro 3 165bhp D5's.

165ps, 163bhp