swap euro S 1980 engine with euro S 1984 engine
01-14-2014, 03:35 PM
#31
Rennlist Member
Thread Starter
CI$ and LH injection have different injectors with different mounting in the intakes. You need a Euro S CI$ intake and throttle body. The WUR, warm up regulator is different, but I don't know in what way, just a different part number.
Something to consider with a 4.5 or 4.7L refresh vs 5.0L is that rings and headgaskets are I believe cheaper in the more common 100mm size.
Plenty of different things to consider, but I see the gains of the Euro hybrid well worth the costs.
Note the 32v 85/86 Euro motor is a lower compression than USA motor, so may not work as a hybrid motor bottom end.
Something to consider with a 4.5 or 4.7L refresh vs 5.0L is that rings and headgaskets are I believe cheaper in the more common 100mm size.
Plenty of different things to consider, but I see the gains of the Euro hybrid well worth the costs.
Note the 32v 85/86 Euro motor is a lower compression than USA motor, so may not work as a hybrid motor bottom end.
the intake , WUR and throttle of a CIS 4.7l S engine. that should work, not?
01-14-2014, 06:47 PM
#32
Rennlist Member
Mark,
you are absolutely right. Let me rephrase my question differently :
I have a spare engine of 1984 (I don't know yet if early or late 84),
what should I replace on the engine to fit it in my 928S, without changing my original wiring / ecu ?
I know that for an early 4.7l 300hp CIS, nothing has to be changed regarding cabling, since that's what the PO did when swapping the 4.7l 300hp CIS with the 4.5l 240hp CIS.
kr
Gerrit
you are absolutely right. Let me rephrase my question differently :
I have a spare engine of 1984 (I don't know yet if early or late 84),
what should I replace on the engine to fit it in my 928S, without changing my original wiring / ecu ?
I know that for an early 4.7l 300hp CIS, nothing has to be changed regarding cabling, since that's what the PO did when swapping the 4.7l 300hp CIS with the 4.5l 240hp CIS.
kr
Gerrit
DONE! no other changes needed. all your existing stuff will work
Slight side step, but on topic. I was interested in getting a 5.0 block to put under my 84 Euro 4.7. I was thinking of getting an 85/86 block while the getting was good, and then I could do the work later or resell the untouched block if I changed my mind. The 928 intl sale to maximize a hoarder's savings has already come and gone, but I was wondering how much more it would cost to convert an 84 Euro 4.7 to a 5.0 hybrid, versus rebuilding/refreshing the 4.7. Seemed like a lot of extra $$ for little gain, compared to doing that to a 4.5. I know there would be a lot of "it depends/wyait" in the calculation. If I was willing to get new pistons, it seems that increasing the displacement on the 5.0 at the same time would also be opportune, but those two choices would astronomically increase the cost differential to a refresh. I haven't even taken the heads off the 4.7 so I don't know the condition other than it seems to run well.
CI$ and LH injection have different injectors with different mounting in the intakes. You need a Euro S CI$ intake and throttle body. The WUR, warm up regulator is different, but I don't know in what way, just a different part number.
Something to consider with a 4.5 or 4.7L refresh vs 5.0L is that rings and headgaskets are I believe cheaper in the more common 100mm size.
Plenty of different things to consider, but I see the gains of the Euro hybrid well worth the costs.
Note the 32v 85/86 Euro motor is a lower compression than USA motor, so may not work as a hybrid motor bottom end.
Something to consider with a 4.5 or 4.7L refresh vs 5.0L is that rings and headgaskets are I believe cheaper in the more common 100mm size.
Plenty of different things to consider, but I see the gains of the Euro hybrid well worth the costs.
Note the 32v 85/86 Euro motor is a lower compression than USA motor, so may not work as a hybrid motor bottom end.
so, the flat top 85 US pistons on the US 85 block, is perfect for the euro. you end up at around 10.8:1 compression . SO, the US 85 5liter block is the PERECT choise for the hybrid. its the way it has always been done.
01-15-2014, 08:11 AM
#33
Nordschleife Master
this is not relivant, because the US 85 block, fits on US 85 heads with a big combustion chamber. in fact, if you use S4 heads you will end up at 12:1
so, the flat top 85 US pistons on the US 85 block, is perfect for the euro. you end up at around 10.8:1 compression . SO, the US 85 5liter block is the PERECT choise for the hybrid. its the way it has always been done.
so, the flat top 85 US pistons on the US 85 block, is perfect for the euro. you end up at around 10.8:1 compression . SO, the US 85 5liter block is the PERECT choise for the hybrid. its the way it has always been done.
01-16-2014, 03:05 PM
#34
Rennlist Member
sorry, forgot about that 85-86 year where europe was between models. There were some ROW models of the 5 liter , but i think it was the same engine short block. 9.3:1
I dont know what the pistons look like for it, but im sure someone can verify that they are not S4 pistons with a deep dish. if they are not, they should work (and that block) would work fine. they all used that early ( big combustion chamber) 4 valve head, so the pistons had to be pretty flat or it wouldnt run! so, if there are any early pre s4 blocks in europe, they would work for the hybrid ( i think an someone im sure can confirm this)
I dont know what the pistons look like for it, but im sure someone can verify that they are not S4 pistons with a deep dish. if they are not, they should work (and that block) would work fine. they all used that early ( big combustion chamber) 4 valve head, so the pistons had to be pretty flat or it wouldnt run! so, if there are any early pre s4 blocks in europe, they would work for the hybrid ( i think an someone im sure can confirm this)
07-14-2014, 11:33 AM
#35
6th Gear
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Did this swap ever proceed and what was the outcome?
Has anyone ever put a S4 32V (complete with engine wiring loom and ECUs) into an early S? What are the gotchas?
Has anyone ever put a S4 32V (complete with engine wiring loom and ECUs) into an early S? What are the gotchas?