Remapping

[BenzedUP]

Think I'll talk to the dealer on monday and see what they say. Although I enjoy the extra performance on offer now, I don't need it that badly and I'm not willing to risk damage to the engine! Just as well there's the 14 day trial period!!

Custom ECU remaping is good, all my previous cars have been remaped, and never had any problems with them.. infact they seem to run better than standard!

I've remaped all my previous cars with West-tuning, and i'm remaping my SLK with them soon, they are expensive but they do it proberly, a custom ECU remap should take 5hrs or maybe more depending on the car and not 30mins downloading crap from a laptop onto the ECU and making up figures!

 

[bpsorrel]

When you say expensive, how much is an average? I notice on their website they don't include Saab - is it worth calling?

 

[BenzedUP]

Yes give them a call and see what they say..

Ray did my E320 CDi for £400 cash.. say Josef recommnded me and he will probably give you some sort of discount if you ask for it..

He was working on a Ferrari 355 for £1200 lol, apparently they have 2 ECU's etc...

 

[crockers]

Why?.... the Hirsch upgrade is fully warranted and approved by Saab and was uploaded by a Saab dealer....

When I said "be careful" it was in relation to taking photos of your speedo and tacho whilst driving at 80mph. Caught doing that and you may end up in court.

I too am amazed to hear it runs at 1500 instead of 2500 revs. That indicates to me something is intefering with electrical messages. Check it with the dealer / installer. If it's giving spurious rev readings it may also be giving false mpg readings. Fill the car up. Drive for a 100 miles or so. Refill and compare real mpg to computer readout.

 

[bpsorrel]

Took the "Hirsched" Saab for an extended run around London (Swiss Cottage and Regents Park area) and back up along the A41 as far as Aylesbury and back to Berkhamsted (and into Specialist Cars for a look at some Beemers - but that's another story!) and the combined mpg was 41 which is very good and, this time, the 80mph run was done at 1800 rpm which is far more realistic. My BIG question now is, would I want to put the car back the way it was..... Hmmmm, I think I've been spoilt now...

PS- spotted a "Kahn" modified SL55 along Finchley Road. At first, when I saw it head on it looked like an SLR, but as I drew alongside I could see it was an SL. Nice adaption of SLR front with SL body. Also, the HUGE wheels actually looked very good! Couldn't take a photo of the actual car, but this is what it looked like (with different wheels)

 

[Norse]

Not that I don't trust your readings, but the figures seems way off to me. My E280 cdi has 1500 rpm's at 80 Kph.. And there is a looong way from 80 kph to 80 miles/h.. Seems to me that either your tach is way off, or you are doing kph's in stead of miles .....
Just a thought.

 

[bpsorrel]

If I can get a mate to take a photo, I'll post it when I do the speed again. Can't say if the rev counter is under reading, but it seems a lot smoother and quieter at speed, so the "noise" tallys with the lower rpm - but as i said earlier, the reading I got today was 1800 @ 80 mph (I have a 6 speed auto) and it was about 2200 (ish) before the remap. I've been told up to 400 rpm drop in 6th is possible...

 

[BTB 500]

the reading I got today was 1800 @ 80 mph (I have a 6 speed auto) and it was about 2200 (ish) before the remap

That's surely not possible unless the gear ratios have been changed (assuming your car has torque converter lock-up).

 

[bpsorrel]

I'm out of my knowledge comfort zone now! I'll query this on monday with the dealer. Will be interesting to hear their view on it!

 

[BTB 500]

In virtually all modern cars with an auto gearbox the torque converter locks up in top gear (at least) ... so there's no slip. This is for fuel economy reasons.

That means the engine is directly connected through to the road wheels, just as it would be with a manual gearbox. So for a given road speed the engine rpm will always be exactly the same (based on the gearbox and final drive ratios).

 

[bpsorrel]

Ok, today I had the Hirsch map removed from my Saab and the original map replaced. Reason? Well, to be honest, the Hirsch map altered the character of the car too much. All the power was up the top end, making the engine feel more like a petrol - which is fine if you want to be hooning from 90 to 120 in the blink of an eye, but for me, I wanted to remove the low down turbo lag and boost the torque at the 1500 to 2000 rpm level. So, I'm back to normal performance.......... for a while....

next episode of this saga is some chatting with Simon at E-Maps....

 

[The Pan Man]

E270 CDi 80MPH = 2,200 Revs Checked it yesterday on a flat dual carraigeway.

 

[bigyin1]

Ok, today I had the Hirsch map removed from my Saab and the original map replaced. Reason? Well, to be honest, the Hirsch map altered the character of the car too much. All the power was up the top end, making the engine feel more like a petrol - which is fine if you want to be hooning from 90 to 120 in the blink of an eye, but for me, I wanted to remove the low down turbo lag and boost the torque at the 1500 to 2000 rpm level. So, I'm back to normal performance.......... for a while....

next episode of this saga is some chatting with Simon at E-Maps....

If you accellerate from 1000rpm then the boost will come in quite early on these latest twin-turbo engines but if you're trying to improve the speed at which the turbo spools up I think you'll be struggling.

 

[horsesuitedfool]

Ok, today I had the Hirsch map removed from my Saab and the original map replaced. Reason? Well, to be honest, the Hirsch map altered the character of the car too much. All the power was up the top end, making the engine feel more like a petrol - which is fine if you want to be hooning from 90 to 120 in the blink of an eye, but for me, I wanted to remove the low down turbo lag and boost the torque at the 1500 to 2000 rpm level. So, I'm back to normal performance.......... for a while....

next episode of this saga is some chatting with Simon at E-Maps....

Barry i have had lots of remaps done and the latest one i had done from Angel Tuning is thus far the best. It has all the power of all the other various companies remaps but its how it delivers it that is good with theirs. Its instant but not too much so to just wheelspin and it pulls constantly increasing slightly as you climb right throught the rev range. Very happy with it. Nigel at Angel Tuning quoted me £395 to start with and after haggling on email he agreed to do it for £225 so if you can get it for that i would highly recommend it....

 

[bpsorrel]

Thanks guys! I think what I was trying to do actually is limited by the fact that the car's automatic. I tried a manual version today and it felt MUCH faster off the line. Obvious I guess!

I'm thinking now, leave the car alone and concentrate on the hunt for the toy...

 

[Stratman]

What does the rpm/speed now say?

 

[horsesuitedfool]

Thanks guys! I think what I was trying to do actually is limited by the fact that the car's automatic. I tried a manual version today and it felt MUCH faster off the line. Obvious I guess!

I'm thinking now, leave the car alone and concentrate on the hunt for the toy...

You could always get it done by Angel for £225 and then you have 14 days money back as well so could always change back if you didnt want it or think its worth it...

 

[bpsorrel]

At 80 mph, revs @ 2000 rpm. Sounds about right for a 6 speed.

 

[Richard W]

...A chip on the otherhand or a generic map simply uploaded to the car is another 'one size fits all solution' and doesn't actually take account of how an individual vehicle is able to perform which is why they are cheaper but more dangerous...

I would disagree there - a map which takes the engine closer to the limits of it's power is more dangerous than a generic map which works within known tolerance levels that delivers a decent power increase without going to the extreme. After all it's what Prodrive do with the PPP - that's a generic one not a live map and it's well respected for it's driveability and reliability.

This isn't true all my cars have been mapped live and has been previously posted by others its the only exact way of doing it. You can do it as you suggest but the results won't be as good you need to adjust the parameters under load at different speeds in different gears at different revs etc, something that cannot be accurately replicated on a dyno....

I'm confused - how can you measure the changes if you don't use a dyno? if you tweak the timing on the road how do you know it doesn't actually lose power?

If you tweak the timing how does the tuner know that it won't tip the EGR temps too far or over/under fuel?

Ignoring the scooby you mention with a datalogger, how do you get things like AFRs right when driving?

Not looking to be provocative here I'd just like to understand

 

[flango]

I'm confused - how can you measure the changes if you don't use a dyno? if you tweak the timing on the road how do you know it doesn't actually lose power?

If you tweak the timing how does the tuner know that it won't tip the EGR temps too far or over/under fuel?

Ignoring the scooby you mention with a datalogger, how do you get things like AFRs right when driving?

Not looking to be provocative here I'd just like to understand

AFAIK You monitor all the parameters live whist you are driving and mapping, car is equipped with accelerometers and you monitor EGR temps, exhaust gas temp pre turbo etc as well as a host of other parameters, I'm no mapper but when I drive the cars that are being mapped all the data is on the screen live bhp, temps, fuelling etc you make changes do another run and compare. Most stuff if Jap Scooby, Skyline, Evo which as pointed out before suit live mapping.

As I say I'm no mapper just the driver but if you want to know I can ask the guy that does them and what the software is.