Menu toggle

useful 944 site for info

I bought a chip for my 86 944 a few years back - ( still in the car now -Breaking) - He was on Rennlist a lot - not sure if he is still around. lots of people in the states run his chip if i remember right ( all a few years back).


 
Interesting, thanks Peanut. I liked the 'Injection Seat Option' (particularly the option number), and had never heard of the 'Altitude Correction Box'.


Oli.
 
Rennlist is a great forum for information (more so relating to modding that standard cars IMHO) but can be a very frightening place. Advertisers and sponsors post a great deal about their own products, often with rose tinted spectacles on, and rucks can come close to bloodshed. It has a significant International following although the bulk tend to be Americans.

Asking a question on Rennlist is a bit like standing up at an International conference compared to here which is more like asking a few mates down the Pub. You might get more answers quicker on Rennlist but I wouldn't underestimate a number of the posters on this forum......you might well get the right answer here. The other thing with this forum is you might well meet the person posting one day at one of our events so that tends to make it more friendly and real.


 
Hey Peanut, notice you chatting to Rogue_Ant in his thread about DIY tuning. FRWilk has a great site about the 944 and it has really helped me out a few times. Should buy the guy a beer tbh.

The DIY tuning thread is interesting isn't it. I had a play with last night but didn't get so far.

Are you sure that you can't re-program the 24-pin DME. The binary file I got from Rogue_Ant was a 4k file. I've not quite worked out if you need a 24 or 28 pin chip for this yet. It seems like the DME uses 8KB of  memory. The 24-pin uses 4KB internal to the cpu and 4KB of EPROM whereas the 28 pin uses 8KB of external EPROM. Still doesn't help clarify why he's working with a 4KB file :p. 
 
ORIGINAL: barks944

Hey Peanut, notice you chatting to Rogue_Ant in his thread about DIY tuning. FRWilk has a great site about the 944 and it has really helped me out a few times. Should buy the guy a beer tbh.

The DIY tuning thread is interesting isn't it. I had a play with last night but didn't get so far.

Are you sure that you can't re-program the 24-pin DME. The binary file I got from Rogue_Ant was a 4k file. I've not quite worked out if you need a 24 or 28 pin chip for this yet. It seems like the DME uses 8KB of memory. The 24-pin uses 4KB internal to the cpu and 4KB of EPROM whereas the 28 pin uses 8KB of external EPROM. Still doesn't help clarify why he's working with a 4KB file :p.
Click to expand...


its an interesting topic for sure but programming is probably beyond my feeble mind nowadays. [&o]
As I understand it the pre 1985 NA 944 ECU has a 24 pin non re-programable chip . I believe it is a write once read only chip.
The later 28pin procs are programable EPROM (eraseable programable read only memory )

I used to program digital audio chips once and also PIC chip programming for animatronics but it was a long time ago now

There used to be a company that specialised in programming chips for high end sports cars on the A303 at Lydford nr Yeovil but I think they went bust.
Whats your handle at Rennlist ?
 
ORIGINAL: John Sims

Rennlist is a great forum for information (more so relating to modding that standard cars IMHO) but can be a very frightening place. Advertisers and sponsors post a great deal about their own products, often with rose tinted spectacles on, and rucks can come close to bloodshed. It has a significant International following although the bulk tend to be Americans.

Asking a question on Rennlist is a bit like standing up at an International conference compared to here which is more like asking a few mates down the Pub. You might get more answers quicker on Rennlist but I wouldn't underestimate a number of the posters on this forum......you might well get the right answer here. The other thing with this forum is you might well meet the person posting one day at one of our events so that tends to make it more friendly and real.
Click to expand...

odd post John ? why not let people make up their own minds about the site ?
 
The pre 85.5 DME's do not have a removable chip. The >85.5 DME's all have removable chips. Up too 87/88 they had a 24 pin chip and after that the 28 pin chip.
 
ORIGINAL: barks944

The pre 85.5 DME's do not have a removable chip. The >85.5 DME's all have removable chips. Up too 87/88 they had a 24 pin chip and after that the 28 pin chip.
Click to expand...

ah that would explain it . It wouldn't be too difficult to de-solder the chip and insert a plug-in socket I shouldn't have thought. You might fry the original chip I guess
 
you'd need a thin nose solder pump and ideally an IC solder iron bit but if you just snip all the EPROM legs and then use the solder pump on individual pads it should clean up a treat. I think if you spent too long heating the chip legs trying to salvage the EPROM it could result in the PCB board tracks and pads de-laminating and surrounding components getting heat damaged.. Be interested in how you get on
 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Back
Top