I have a running 2.5lux as a donor, so I have all of the parts I need. But I'm starting to think the head rebuild the easier option coz of all the engine management variables!
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| 944 2.5 conversion to 3 litre back to 2.5 https://forums.tipec.net/viewtopic.php?f=25&t=22320 |
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| Author: | binsie2003 [ Sun Feb 26, 2017 6:31 pm ] |
| Post subject: | 944 2.5 conversion to 3 litre back to 2.5 |
Hi, My neighbour has recently acquired a late (1988) 944. Which has had a 3.0 installed due to a previous engine disaster. The 3.0 litre has now also expired with a broken cam belt. I am told the original conversion included the trany and most probably the DME??? The plan is to donate a strong 2.5 engine, trany and 2.5 DME to return the car to its original 2.5 state. Questions: Would the DME at the time of the 3 litre conversion have to have been changed due to the different engine management requirements? If so would this have entailed chopping any of the DME wiring or is it plug and play? Would there have been any mods to the engine wiring in the engine bay? Is the throttle cable going to have to be changed back for the 2.5? I'm sure there are more questions I'll post as I go. Anyone who knows about how this has been done please chip in with any useful info and words of encouragement! I look forward to hearing from you :0) Regards Steve |
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| Author: | pilch [ Sun Feb 26, 2017 8:43 pm ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
The DME from an 8v 2.5 wouldn't work with a 3.0. My 2.5 16v had a 3.0 DME and drove fine so unless the previous engine was the 2.5 16v you'd need to get an 8v DME |
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| Author: | rapidstu [ Sun Feb 26, 2017 8:53 pm ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
wouldn't it be easier to just repair the 3.0 head? unless your going to add a turbo, wouldn't the 3.0l be a better option for power and torque?? i'm biased tho |
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| Author: | scam75 [ Mon Feb 27, 2017 1:14 pm ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
Definitely easier to stay 3 litre. The DME is different, the fuel pressure is different, 3.8 bar I think for the 3 litre vs 2.5 bar for the 2.5. There are many differences TBH. If it was me I would look to repair or replace the 3 litre lump. You're also surrendering 60 odd horses going back to 2.5L 8v. Stuart |
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| Author: | binsie2003 [ Mon Feb 27, 2017 6:01 pm ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
I have a running 2.5lux as a donor, so I have all of the parts I need. But I'm starting to think the head rebuild the easier option coz of all the engine management variables!
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| Author: | Endoman [ Wed Mar 01, 2017 12:39 am ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
9apart have a couple of heads in atmo. |
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| Author: | 944 Man [ Thu Mar 02, 2017 10:04 pm ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
Comedy prices though, and Simon's children are arrogant beyond belief. The days when you paid a strong price but received decent kit and Simon nipped it 'round are long since passed. |
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| Author: | MichaelW944 [ Fri Mar 03, 2017 7:42 am ] |
| Post subject: | Re: 944 2.5 conversion to 3 litre back to 2.5 |
944 Man wrote: Comedy prices though, and Simon's children are arrogant beyond belief. The days when you paid a strong price but received decent kit and Simon nipped it 'round are long since passed. Couldn't agree more with this. I've learned this 1st hand. Douglas valley I've found to be very helpful. |
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