147 2.0 Selespeed Maping results

Just thought I’d share my engine mapping results with you fair people. The car itself is a bog standard 2001 147 2.0 Selespeed with 30,000 miles that seems to have been well looked after in its previous life (FSH etc). I've had it since September 07.

I did the deed via Red Dot Racing (Watford) and very friendlily they where too.

Before the mapping
BHP 136
Torque 105

After the mapping
BHP 153
Torque 119 lb-ft

BHP increase by 17 (12.5%) and Torque increased by 14 (13.33%)

Cost to do the job was £199 as long as you a Alfaowner forum member.

When driving the car you can defiantly feel an increase in acceleration times. Fuel figures seem the same as before but then again I only got to drive it for a few minutes after the mapping.

All in all I'd recommend it if you got £200 quid to spend and about one and a half hours to spare.

Are those figures at the wheels?

Any chance you can post up scans of the before and after graph?

£200 is a bargain considering you haven't even joined the Club!

I thought that just being a member of the forum was enough. Hmmm sorry Red Dot:-)

From what I understand the figures are at the wheel, not at the crank.

Originally Posted by amadramzan

I thought that just being a member of the forum was enough. Hmmm sorry Red Dot:-)

I'll be having words with Augusto Shhh....


Those figures are calculated form the wheels. Also.. 136BHP is a bit low for the 2.0 but they do tend to be out more than the 1.8's.

136bhp is a bit on the low side, that's why I thought it might be the car's wheel horse power. There could be lots of reasons why that is though, especially if the engine has done a lot of miles and its servicing hasn't quite been up to schedule.

Try some fuel system cleaner in your next tank of fuel, you might just have a slightly clogged injector.

the 150 BHP Alfa quotes for the stock car is at the crank, isn't it?

How much should I get from an stock Alfa at the wheel. I though 136 bhp at the wheel was pretty good for a 30,000 mile car. You'd expect at least a 10-15 bhp drop from the crank to wheel.

I once dynoed my bike (Yamaha R1) and that was supposed to have 150 at the crank, rear wheel showed 142 bhp. A loss of 8 bhp for a simple chain drive. Given a cars more complex transmission you'd expect to loose more.

That's why I asked for a scan of the graphs, to see if I could make out whether that would be the "at the wheels" figure or "at the flywheel", calculated by adding the power from the coastdown to the power at the wheels..

Normally there's roundabout a 19% transmission loss on a FWD Alfa, so if yours truely is 136bhp at the wheels that makes nearly 168 at the flywheel - well over the standard figures and that's before the remap.

I suspect that it was calculated to be 136bhp at the flywheel, giving you about 110bhp at the wheels before, and about 124bhp at the wheel after..

if thats the case i've gained 3 bhp over standard...hmmm

I'll try and add the graphs to the post later on

Update...just spoke to someone at Red Dot they confirmed that the Fig i quoted is the power at the flywheel and not at the front wheels.

So the original figs where 136bhp (at the flywheel) stock should have been 150...where's my 14 bhp gone!!

Could be a reason as to why your car was under-performing.. Needs spark plugs, partially blocked fuel filter/fuel lines, clogged injector, timing is off, catalytic converter is partially blocked, exhaust is blowing, lambda sensor/MAF is slightly misreading..

We'll be able to tell a lot more from the graphs, see if curve is similar to other twin spark engines known to be in good working condition..

Remember that the 147 2.0TS comes with standard VDC which intervenes and cuts engine power on the rolling road. I bet that your power curves are jagged over 4000rpm, right? This is the VDC cutting in. Same goes for GT 2.0 JTS that also seems to under-perform on the rolling road but shows its 165HP on the road.

You would need a special kind of rolling road capable of spinning the rear wheels to match the speed of the front ones so that the VDC does not think that the car is slipping and intervenes.

Originally Posted by alfasud.ti

You would need a special kind of rolling road capable of spinning the rear wheels to match the speed of the front ones so that the VDC does not think that the car is slipping and intervenes.

This might be the case. For example some RWD petrol Mercedes models can not be revved over 4k when the front wheels are not turning.

Other problem might be wheel slip on roling road....

I have heard somewhere that the Mercedes models have a "rolling road mode" in which their antislip/stability systems are fully deactivated. Romour has it that some owners use this feature to completely deactivate the electronics on the road in order to achieve ...angles of attack unbecoming a Merc.

I’ve just received my Professional ISO OBD-II / VAGCOM ALFADIAG KKL USB Interface (USB ISO OBD-II / VAGCOM / AlfaDiag KKL Interface keywords [USBVAGCOM] - £29.99 : ECUFix.com, Affordable Technology)

I want to record my 0-60 times and 1/4 mile with the remap, apparently you can do this with AlfaDiag. Problem is where is the OBD port? I know its somewhere under the steering wheel. I opened the panel and saw a likely connector but there's already a cable connected to that!! Do I unplug that and connect in the ODB cable or am i missing something.

I'll post the bhp before and after graphs once I’ve scanned them in.

OBD connector is definately not connected to anything... but where it is , that's another matter... within 80cm of the steering column normally...

Originally Posted by Cuore_Sportivo_155

OBD connector is definately not connected to anything... but where it is , that's another matter... within 80cm of the steering column normally...

i'll have another looksee and see if I can find it

You have to open the large panel underneath the steering column at the driver's knees and you will find it easily. It shouldn't be connected to anything.

Originally Posted by alfasud.ti

Remember that the 147 2.0TS comes with standard VDC which intervenes and cuts engine power on the rolling road. I bet that your power curves are jagged over 4000rpm, right? This is the VDC cutting in. Same goes for GT 2.0 JTS that also seems to under-perform on the rolling road but shows its 165HP on the road.

You would need a special kind of rolling road capable of spinning the rear wheels to match the speed of the front ones so that the VDC does not think that the car is slipping and intervenes.

My last 156 has VDC and this did not cause any problems.

Amadramzan,

How did you get on with the cable/alfadiag software? Did you manage to get it working in the usb port of your laptop, if so would you mind posting up some details. Stuff like timing etc would be great, as I am having problems with mine

Thanks

Originally Posted by Alfaman156TS

Amadramzan,

How did you get on with the cable/alfadiag software? Did you manage to get it working in the usb port of your laptop, if so would you mind posting up some details. Stuff like timing etc would be great, as I am having problems with mine

Thanks

i'm going to give it a go over the weekend...i'll post the results once they're in.

Nice one mate, look forward to it. Best of luck!

here's the bhp and torque graphs Before and after the mapping. Let me know what you think

Nice, I wonder why its a bumpy line though?

Originally Posted by Pud237

Nice, I wonder why its a bumpy line though?

maybe cos the VDC is trying to kick in....i have had a fault on one of my lambda sensors maybe thats what's causing it

on Wide Open Throttle the closed loop operation is cancelled and lambda readings disregarded. The motronic is just going by the AFM, engine temp, air temp and knock sensor and RPM/TDC sensor. No fullproof explanation for the ripple though, Red Dot will know...