Cool chipping kit!

[Speedtouch]

Just seen this on e-bay, designed for AUDIs. I was thinking this would be a great design for our E30s - it'd be great to be able to take your USB memory, alter the program on a laptop then go and test out the new settings on the car. You could even have several different USB memories, programmed for different purposes, eg track days, etc...

Could such a system be adapted to work with Megasquirt?

[Speedtouch]

Ooops, the link is http://cgi.ebay.co.uk/Audi-90-110bhp-V6 ... dZViewItem

[Speedtouch]

I notice they do a selection of BMW ones also - but only for diesel turds. Why?!!!

[mrLEE30]

chipping an E30 usually will not result in ''additional power'' they simply alter the power / torque curve so it imporves the car in some areas but the trade off is it will be worse in others. but if you alter any of the stock componants such as exhaust etc then usually a chip will be remapped to best suit the new engine configuration and componants.

As far Diesel remapping- the factory setting will be for optimim fuel ecnonmy and performance, re mapping an ECU will alter the engines prefomance (usually by increasing fuel pressure and allowing more air in too) which will result in poor fuel economy but much more power and BMW know people do not buy Diesels mainly for perfomance so they deisgn the fuel mapping accordingly,


and finally i doubt if you have seen one of the Le Mans winning Audi Diesels you would consider it a turd!!

mrlee

[Ant]

Could such a system be adapted to work with Megasquirt?

no problem, but you'd still need a laptop to swop the file over dude.

can have two maps on MS and swop between as required, but I've yet to find a real use for the facility TBH.

map swopping is as easy as load file-burn the flash, done , takes about that long too.

[Turbo-Brown]

Think if you had a dedicated race car or something you could have a map for dry use and a softer map for use in the wet where the ignition's retarted a bit to help avoid wheelspin.

As ya say though, can't think of any practical use for the road.

[Brianmoooore]

Already do this with LPG powered cars. Plug in the laptop and change fuel map values while driving, or download complete stored files from the laptop.

[cheesebox]

Plug in the laptop and change fuel map values while driving.

Brian, you've been watching too many films!

[doughboy]

I couldn't see the ebay auction.... Some annoying twat talking made me press the red X.

[EndaW]

It is a relatively simple thing to swap between maps on the e30 ecu`s (later types 173/172/380/381/522/175/157 etc etc)

You can fit a double sized eeprom (lets say 512kb as apposed too 256kb) and have the eeprom hold both maps, either 2 mod files or an original and a mod.
Then all you need is an obd controlled switch which could be made for pennies if you got enough people interested to bring the cost down.

We have been doing this for a while although i cant see the point really as good mapping will give you the best of both worlds anyway,

Also, there are a lot of myths about diesel tuning which are not quite correct.

You can tune a 330d from 184hp too 225hp and give another 80Nm torque and still gain economy by 2mpg.
Its not all about increasing fuel pressure, there are many ways too increase power.

XS Performance have mapped a few cars lately with great succes (petrol and diesel) but for an example they mapped a Ferrari 360 from 389hp too 438hp, a Porsche GT2 from 460hp too 525hp and a Mercedes 500 from 500hp too 590hp and all of them return the same economy on like for like driving.

In modern ecu`s there are many factors too tuning and its not all about fuel and spark.

[Speedtouch]

Thanks for the info. I like the idea of a switch to be able to select different EPROMs - that way you could have standard, Mild and Wild settings... I don't suppose anyone has any programs available to look at?
Cheers!

[EndaW]

Yes, the switch is stock L-line interface an change starting path from 0000f too 00003 but as i said above, this wont matter too much as the difference between mild and wild isnt a great deal in true terms.

This is good for charged engines as the difference is huge or diesel engines where you run a lot of fuel pressure (loads of smoke) for speed runs but wouldnt want it to be like that all the time.