So, i’ve recently collected the car after some rework.
The valve stem seals were found to be problematic; it stunk of oil at idle and it was puffing smoke - all of this after a significantly expensive rebuild. Lots of oil consumption too. Sub-optimal, you’d agree.
A decision was also made to go twin plug with some additional Bosch CoPs, to accommodate some 11.5:1 JE pistons, cc’d at 11.65:1, to replace the 10.2 Mahle.
The final piece was to fit some ‘F Modell’ 42mm OD Eisnemann h/ex
Old (Mahle) v new (JE)
GT3 crank and Pauter 127.8mm rods:
New JEs fitted:
port matching on intake side:
All important Heet Sheets!:
Outgoing 993 intake setup:
Incoming Velocity stack setup:
