pacificmx

Can anyone help me?

I have a 1997 993 TT. I just changed out the turbos and am now trying to have the DME chipped to boost hp.

THE PROBLEM:
my 1997 car was actually produced within the first few months of 1997's production year (July 1996, to be exact), so apparently the original DME on my car cannot be reflashed (with GIAC).

THE GOAL:
since learning that my car can't be reflashed with the existing DME, I've been trying to figure out the right DME Part number to order with through Porsche. I wanted to order the DME without having to order the immobilizer as well. The dealer gave me 2 different part numbers, one for with the immobilizer, one without.

But since the dealership has to order the part directly from Germany, I want to make sure I order the right one.

The part # for a DME without the immobilizer is: 993.618.665.10

THE QUESTION:
Does anyone know if this DME will have the Bosch # 0261204377 ??
Because, as I understand it, in order to reprogram a 993 DME with GIAC, the unit must have that Bosch number (ending in 377).

I know there are other posts out there similar to mine and I've been combing them for info. However, I can't seem to get an exact answer as to which DME Part number will for sure be what I need.

Thanks for any help!

Kevin

You are making this too difficult. The US dealers will supply you a ECU with the immobilizer intact. GIAC should be able to code out the immobilizer. Have you seen the new price for a replacement ECU?

FYI, there are tuners that can tune the '96 ECU..

911PERVY

As Kevin says, just find someone to do your 96 ECU, Todd has just done mine (911tuning)

malcolmd

I believe it goes like this:
The 96 ECU architecture is rather different to the 97, having two rather than one internal boards and the relevant chip is soldered directly to the board. Historically the 96 ECU was not programmable as a consequence and those wanting to reprogram had to source a 97 ECU for this purpose.
In the 97 ECU, the mounting of the chip on the single board is more easily "swapped" - hence this was the historic route for upgrade.
In more recent years, tuners such as Kevin and others have devised the means of removing/resoldering chips to the 96 ECU board thereby facilitating direct upgrade of the your 96 unit.
I'm sure there are better and more technical explanations, but this provides the gist.

pacificmx

I probably am making this too difficult, but I've been spun around with all these part numbers and such that I've lost perspective.

However, I am set on getting one without an immobilizer because it'll be half the cost.
And I have heard of shops being able to tune 96 ECUs. But my car is already at a shop (GMG) that cannot tune the existing ecu and I was hoping to stay with them until the end because I just recently installed their ball bearing turbos onto my car.

Felix

I believe the answer to your question is yes. You can no longer purchase the older, more difficult to program ECU from Porsche. But the price of a new ECU is eye watering.

Here's an interesting post in another forum that suggests the drive block can be easily added or removed by a knowledge programmer/tuner.

JBL930

They are expensive, just been told by RS Tuning that the ECU that i sent them was questionable, and that it was a 'risk' to use it, new ECU is £1850 inc VAT, $3k...... Ouch Not worth taking the risk though!

Not sure why your outfit can't use the earlier ECU if there is nothing wrong with it, seams most other tuners can

Felix

Here's something interesting: the 993.618.665.10 ECU (without drive block) has a US RRP of $2012 and the 993.618.666.10 ECU (with drive block) has an RRP of $4072 !! Discounted they're $1446 and $2927, respectively.

That's a lot of money for a couple of bytes programmed differently

malcolmd

I recently tried to source a 993.618.666.10 after returning my car to stock. All the usual US parts suppliers could not supply directly - only special order out of Germany. Happily, one of our "brothers" on Rennlist came to my aid...

Texas993

Kevin once told me to make sure I lock my doors and keep my RUF tuned ECU safe. Now I see why! Wow, that is some expensive hardware.

dfwporsche

What gain did you get on your 96?

pacificmx

You're right about that! That is a big price difference which is why I was trying to get the one without the immobilizer.

And I think you're right, Felix. Any ecu I get at this point from Porsche probably will be the "newer" reprogrammable version. I guess I just wanted to ask in case somebody knew for certain, before I laid down my money.

Discounted at $1446??? That's actually really decent. Where would I be able to get that?

No HTwo O

Try Sunset Porsche- 503-641-8600.

Basal Skull

a little uncool for your tuner to not know this before changing your turbos etc.

Felix

That price came from parts.com - try Sunset or Gaudin.