This question is pretty close to my heart at the moment, at I have just had a turbo and crank expire after my Spa and Nurburgring trip in May. There may be a possibility that I suffered oil surge most probably at Spa due to the very fast and sweeping nature of the circuit.
We have seen that due to evolvement in suspension and tyre grip over the years, that when Evo's are used in real anger such as Time Attack and Trackdays, these engines suffer oil surge on right hand bends.
AMS has devised a sump with an extra 1.5 Litres of oil capacity and a few other tricks, but I'm led to believe that this isn't the answer either, and even if you had an AMS sump fitted, there is a potential for the engine to suffer oil surge
Most of the Evo Time Attack field is now going dry sump, to hopefully eliminate this phenomenon, but when is dry sumping really necessary ??
Are we saying that any Evo used on track that had more than a certain "G" on right hand bends could have most likely had the big end shells pick up ??
How would you know, without removing your sump and and taking your big end caps off to inspect your shells, ultimately your car could have worn shells now, and be in the same predicament that my car was ??
I'm just trying to get my head around spending in the region of £7000 for my replacement turbo and engine refresh which will probably require a new crank, unless I decide to regrind the old one.....
Would be good to have a focused dry sumping debate once and for all, to see at what level we need to go this way, whether it's G-Force, power levels etc, etc....
We have seen that due to evolvement in suspension and tyre grip over the years, that when Evo's are used in real anger such as Time Attack and Trackdays, these engines suffer oil surge on right hand bends.
AMS has devised a sump with an extra 1.5 Litres of oil capacity and a few other tricks, but I'm led to believe that this isn't the answer either, and even if you had an AMS sump fitted, there is a potential for the engine to suffer oil surge
Most of the Evo Time Attack field is now going dry sump, to hopefully eliminate this phenomenon, but when is dry sumping really necessary ??
Are we saying that any Evo used on track that had more than a certain "G" on right hand bends could have most likely had the big end shells pick up ??
How would you know, without removing your sump and and taking your big end caps off to inspect your shells, ultimately your car could have worn shells now, and be in the same predicament that my car was ??
I'm just trying to get my head around spending in the region of £7000 for my replacement turbo and engine refresh which will probably require a new crank, unless I decide to regrind the old one.....
Would be good to have a focused dry sumping debate once and for all, to see at what level we need to go this way, whether it's G-Force, power levels etc, etc....