Hi there
I saw your post from way back about odd-fire cams on the PRV engine, and an attachment by OddFireV6 who I cannot seem to locate.
I am in New Zealand, and managed to get a grind spec from the UK for my Alpine GTA D500 (2.85 atmo, carburettor), and Franklin Cams here in NZ have ground two sets which both worked fine on two other cars, one mine, and one another chap.
We have now had another set ground for my second car, but had trouble setting them up.
The engine concerned has had head swaps, with the heads fitted modified by a head expert Lindsay Rodgers here in NZ (now retired and unable to be traced).
Those heads were originally fitted to a car that threw a rod, and were purchased and fitted by the owner before the guy I bought the car off. He too is now untraceable!
When my recon guy stripped the engine (he did the other two cars as well) he did not mark the cam timing location before disassembly, as he knew the standard timing procedure which had worked fine on the other cars.
We now believe the cams in this car came with the heads, and that those heads were off an even-fire engine.
I have been advised that the 2.5 litre even-fire cams are identical to the 2.85 litre odd-fire cams, but the cam gears are different, meaning the cams cannot be timed using the standard method.
I note from your Volvo cam spec sheet, that there appears to be a different between the A and B bank settings, which is confirmed by a German manual I have, although the numbers there appears a long way different to ours.
Do you know what the actual difference in timing should be between the A and B banks on an odd-fire engine?
We have had adjustable cam gears made, and would be setting up at full lift.
The specsheet for the cams specifies both the lift at cam and the lift at valve with 1.5 rockers.
Any help or thoughts would be appreciated.
Regards
I saw your post from way back about odd-fire cams on the PRV engine, and an attachment by OddFireV6 who I cannot seem to locate.
I am in New Zealand, and managed to get a grind spec from the UK for my Alpine GTA D500 (2.85 atmo, carburettor), and Franklin Cams here in NZ have ground two sets which both worked fine on two other cars, one mine, and one another chap.
We have now had another set ground for my second car, but had trouble setting them up.
The engine concerned has had head swaps, with the heads fitted modified by a head expert Lindsay Rodgers here in NZ (now retired and unable to be traced).
Those heads were originally fitted to a car that threw a rod, and were purchased and fitted by the owner before the guy I bought the car off. He too is now untraceable!
When my recon guy stripped the engine (he did the other two cars as well) he did not mark the cam timing location before disassembly, as he knew the standard timing procedure which had worked fine on the other cars.
We now believe the cams in this car came with the heads, and that those heads were off an even-fire engine.
I have been advised that the 2.5 litre even-fire cams are identical to the 2.85 litre odd-fire cams, but the cam gears are different, meaning the cams cannot be timed using the standard method.
I note from your Volvo cam spec sheet, that there appears to be a different between the A and B bank settings, which is confirmed by a German manual I have, although the numbers there appears a long way different to ours.
Do you know what the actual difference in timing should be between the A and B banks on an odd-fire engine?
We have had adjustable cam gears made, and would be setting up at full lift.
The specsheet for the cams specifies both the lift at cam and the lift at valve with 1.5 rockers.
Any help or thoughts would be appreciated.
Regards