remap?

[elliot]

ive heard a lot of talk about this but ive no idea what it means
could anyone enlighten me?

elliot

[MONSPORT42]

This a non technical explanation! The 'injected' non-carburettor E30 engine management system is governed by a computer programme which is factory preset to give 'average' fuelling/ignition at all operating conditions. This sits on a chip inside ECU. The Series I systems were called either 'J', 'K' or 'L' Jetronic. Around the middle of '87 this was changed on most models to 'Motronic' which had more sensors and gave more information to the ECU and was therefore much more tunable. A remap is when the car is put on a rolling road and a programme is created to get the maximum performance from the individual car. Once this is achieved it is downloaded onto the existing or a new chip replacing the factory programme. This process can release a good level of power from even a standard car but it will optimise any added modifications. You can brief the rolling road engineer to achieve the characteristics you want within the limits of what's possible.

[Widge]

How much roughly? And where do people go?
I'm trying to find out what would be best once I have built the 2.7
Is a remap as good/ better than a uni chip?
cheers

[MONSPORT42]

Obviously all places vary but I think you'd need to budget for about Ԛ£50 ph and it can take up to 5 hours to do. If your car is standard or only lightly modified you might be better going for one Ants Zone Chips. Whilst they are not programmed to your exact car they will help rise a lot above 'the average' factory settings. I think you can get them for the 2.7 conversion too. A lot cheaper than a remap. I believe a Unichip is only another version. Mines a 2.7 but it has a MAF which replaces the AFM. This needs a Unichip to read the MAF sensor information which then downloads to the ECU chip. Don't no of any RR/Dyno set ups in the North. The Zone organises Rolling Road days in the Midlands quite often. Maybe someone else here can help

[Widge]

I think I'll get it up and running on the 2.5 injection for the run in, then get a FPR and 2.7 ant zone chip for the time being till I have totally finished/collected all my mods and then get it mapped.
I don't see the point in having it mapped as one set up then improving it and having to have it remapped. I'm not really bothered about max power till I have the whole setup.

[MONSPORT42]

Sounds like a good way forward. Good luck

[M5pilot]

You dont need an FPR. Youll only end up over fuelling and losing power.

Alot of the 2.7's dont use the FPR, Alpina/Hartge dont use them either. You dont need one.

[MONSPORT42]

Hi Widge, just woken up - didn't spot thhe FPR in your last post - must of been getting late! You certainly don't need one, standard pressures are more than adequate. Good catch Sal!

[Widge]

That's nice to know, just knocked Ԛ£100 off the budget. Presumibly bigger injectors are unnessicary too. As it's only 200cc bigger I would have thought that the 325 injection should be able to deal wiht it.

[Ant]

Defo use the stock 325 injectors and plenumn dude, good enough for a C2 then defo good enough

BBTB would show excellent gains with the stroker mill so maybe we can spend that spare Ԛ£Ã”šÃ‚£ for you anyways

I have 3 chip versions to suit a 2.7 depending on cam spec chosen, as has been stated not quite a full monty remap but very close as its been R+D and tested on the road long term and tweaked where applicable.

[Widge]

Hi Ant, I had kinda bugeted for a BBTB any way
It's gonna have a C2 cam and apart from the BBTB be totally stock 2.7 stroker with 2.5 head, block (decked 1.5mmm ish) and pistons. So I don't know exactly what the compression ratio is going to be but I had assumed I was going to use a zone 2.7 chip. What options do you do?
Cheers