Getting the old girl remapped... I should have learned my lesson by now...
- Thread starter Maniac
- Start date
"Our phase 1 35iS map can also be applied to a 35i with a Supersprint cat-back exhaust system"... so subtle differences would be a E.E.C homologated exhaust right on the maximum noise levels? Both the M-Performance & Supersprint exhausts just scrape in under the maximum noise levels for E.E.C approval but the 35i exhaust is well under.SO8 said:
Timdon said:Any body used quantum bmw tuning for a stage 1 remap, lots of good reviews
I used Quantum Tuning for my remap, albeit on a E85 http://www.quantumtuning.co.uk
The following is my feedback (full thread here: http://www.z4-forum.com/forum/viewtopic.php?f=2&t=82745)
I had my remap and CDV delete done on Saturday.
The results . . .
The short version . . .
It’s faster :evil:
The long version . . .
Since buying the car in June I had been running it as standard, and to be honest I couldn’t fault the driving experience. Despite this, I was greedy for a few more horses. After feedback from this thread I also became interested in the CDV delete mod. I had experience with remapping on previous cars, but hadn’t a clue what a CDV (Clutch Delay Valve) was, let alone why anyone would ‘delete’ one.
I investigated the CDV and the benefits of removing it, and why BMW in their infinite wisdom installed it in the first place. I have to say the reports of less jerkiness and a smoother gear change particularly in 1st and 2nd definitely appealed. If the reports were accurate, I liked the idea of the clutch engaging in a more direct way, especially from standstill. So I was very intrigued to find out for myself how the car would drive following the mod.
As mentioned, in addition to the CDV delete I was remapping a naturally aspirated engine in a car that was driving superbly. So there was a fair amount of trepidation, and also a feeling that perhaps the claimed power gains of around 9% wouldn’t be noticeable. I also realised the increases quoted were just projected numbers on a graph, and since I wasn’t doing a comparative dyno test, I wouldn’t know for sure what the actual power gain was (claimed increase: 265 to 288 bhp). However, a 30 day money back guarantee meant I could swap back to the original map if I wasn’t satisfied.
So, there were lots of unknowns and also a niggling feeling that I might be better off spending my money on something else. However, having done a lot of reading and talking with the mechanic, I felt reassured - plus his price was very reasonable. The cost of the remap was discounted due to going through a mutual friend, and the CDV delete was thrown in at no extra cost.
The first thing to make clear is that because both mods were done at the same time I’ve introduced 2 variables into the driving dynamics, therefore it’s tricky to discern the relative benefits of each mod separately. To make things even more fuddled my newly ordered ZHP gear knob arrived at the dealers on Saturday morning, and so I swapped it on immediately. So I had the drive to the garage (1 hour 20) to appreciate that little subtlety, before the real work began.
I’m well aware that having spent a fair bit on the mods (albeit hugely discounted), I’m hardly an objective observer - it’s very difficult to quell my excitement and temper my enthusiasm. Therefore, this feedback is highly subjective - so with that disclaimer, here goes:
First impressions: well it’s not a dramatic change like remapping a turbo diesel, but I wasn’t expecting a transformation. I have to remember that in standard mode the car is bloody fast, and I wasn’t trying to iron out flat spots or spread the torque over a wider rev range; I just wanted to squeeze a little more power out of the beast, and I believe that has been achieved – it does feel noticeably faster. There is definitely an increase in torque from 2,500 revs upward – and by torque I’m talking about in-gear acceleration or the ‘neck-snapping’ feeling. The car feels more urgent. Also the accelerator pedal feels different - in a good way; the pickup is smoothed out over the full pedal movement, if that makes sense. As for the CDV delete: I can feel a subtle difference engaging the clutch – more of a direct connection. The slight bunny hopping/jerkiness changing from 1st to 2nd has gone.
This feedback is based on Sunday’s drive to the Breakfast meet up at Scar Top – a 2 hour round trip on motorways, A and B roads, plus some tootling about in the afternoon (the drive back from the garage on Saturday was in torrential rain doing 40 to 50 on the M-way with standing water and poor visibility). So far I’d say the mods have delivered a smoother, punchier driving experience. On the strength of one day’s driving it was definitely worth the money, and the gamble has paid off. If there’s anything more to report over the next few weeks I’ll add to this thread.
p.s. I can recommend the ZHP gear knob too
Thanks for the write up Marlon ,I decided to go for the stage one remap today using quantum at gremlin automotive Huddersfield run by rob ,it took about 2 hours in total to install . The result is far better than I expected from 306bhp to 354bhp , I thought the car was fast before but now it's rapid, quick smooth power delivery through all the gears ,roll on summer :evil: :evil: :evil:
I am guessing if car checks out ok on laptop + said map raises boost pressure / increases timing by a pre determined amount, etc then a 'std' gain of xxbhp can fairly be anticipated.
I for one though always have a rolling road session preferably before as well as after as I just like to know how my car is doing
I for one though always have a rolling road session preferably before as well as after as I just like to know how my car is doing
I just think that if you have paid for something you want to know exactly what you paid for.
My bike was mapped on a rolling road and adjusted via computer as it was running.
Every 250rpm the fuel map was adjusted to get the best out of the engine and not just going for power but getting the AF mix right.
My bike was mapped on a rolling road and adjusted via computer as it was running.
Every 250rpm the fuel map was adjusted to get the best out of the engine and not just going for power but getting the AF mix right.
So what parameters are these?Timdon said:
Do they adjust if an exhaust or air intake is changed? What else?
Surely without going on a rolling road all they can do is guess what to change as they do not know what needs changing.
For instance most bikes run rich straight from the factory. Mine now does not as the map has been adjusted to suit.