cdbtx

I have a 4.7L 83 928S. Has anyone tried installing Euro Cams in the 4.7L before? Have a choice of 1980 Euro Cams or 1984 Euro Cams?

Specs on ’80 Euro cams:
In lift: .396
Exh lift: .350
In Duration: 216
Exh dur: 206

Specs on ’84 Euro S cams:
In lift: .472
Exh lift: .432
In Duration: 223
Exh dur: 215

Chuck

83 Kiln Red 928S (Now Running)

mark kibort

I just loving having this informatoin to share!
Yes, the 82 euro cams work on the US 4.7. 243hp at the wheels with the intake.(euro)

i dont know if i would try the 84 S cams. maybe too much lift. hard to say

MK

m21sniper

Just looking at the basic paramaters the S cams 'should' work.

The 84 Euro S has higher compression ratio than the US motor, so odds are the US model has plenty of piston clearance for a Euro S cam, though at that point if the belt breaks you no longer have a non-interference motor on your hands....and the bill will be LARGE to repair it.

Eric Buckley

I also have an US '83 with a 4.7 litre engine (M19). Three years ago I put the cams from a '83 Euro (M11 engine) into my engine. I'm not absolutely certain, but I don't believe I now have an interference engine. I trusted the advice of a couple of folks that these cams would work O.K., and just put them in (well actually I struggled and sweated and cursed while I removed and reinstalled the cam towers while the engine was in the car). I didn't pay any special attention to the relative position of the crank and cams while I was putting things together, and when it was time to put the belt on I just lined up TDC, and then rotated the cams to match from wherever they were. No problems. The effect on the engine was/is quite noticeable. Where the engine began to come "on" at about 3000 rpm before, now it's closer to 4000 and it does seem quite a bit stronger. I really wanted to do some more scientific comparisons of before and after, but my US LHS cam broke before I could make any baseline measurements. I did actually try to find a replacement cam, but when I had no luck I went ahead and installed the Euro cams I already had on the shelf.

That was three years ago. Since then I did manage to get the Euro throttle body installed, but I still haven't gotten around to putting the Euro heads on. At this point the car runs well, and pulls strong.

FlyingDog

That's not true. Unless you have extremely excessive carbon build up, a milled head or deck, or an out of spec engine you will not have an interference engine.

The 80-83 Euro S engines are non-interference and Jim B says the 84-86 engines are also non-interference (it's close and probably depends heavily on the 3 criteria I mentioned above). The pistons on Euro S engines are taller and have smaller valve clearance cuts (8cc for 80-83, 2cc for 84-86 as measured by Mark Kibort). If they are non-interference, a US won't even be close with Euro cams and valves. Just adding the cams means even more clearance.

Rich9928p

I wouldn't take the risk to find out which engine is interference, treat them as if they all are and your bank account will appreciate it.

I can say that in a "hybrid application" - '85 5-liter lock with '83 Euro heads and cams - it is an interference motor. My left bank cam broke and multiple valves were bent. Don't try this.

FlyingDog

The 32V block and 16V heads is obviously interference (higher compression, different CC shape, different valve cut shape). Maybe Mark K or somebody else has the numbers for a 16V US combustion chamber.