Scholle
Never say never
My 05 Rocket did not run clean after 240,000 km. The engine no longer cleanly picked up gas in the upper engine speed range, cylinders 2 and 3 had a lower compression than the 1st cylinder.
So I had the engine removed and disassembled. Although the
fault was with the defective cylinder head gasket, I had decided because of the
high mileage of the engine to a complete overhaul. It turned out that all
components were still in perfect condition. Nevertheless, I had decided to
improve the performance a bit.
Therefore, I bought 3 new pistons from JE with a compression
ratio of 10.5: 1, completely renewed the cylinder head, used new valves and
valve guides and had the crankshaft incl. balance shaft and flywheel balanced.
Finally, the engine should run for another 10 years without problems.
After reading a posting by Ulf Penner elsewhere in this forum Mild tuning cam who said, replacing the stock intake camshaft by a stock exhaust camshaft would be an economical way to increase performance slightly. So I got myself an extra exhaust cam and am now faced with the question as to which position/lobe center this camshaft should be optimally installed.
First and foremost, I am not so much interested in increasing the performance in the upper engine speed range, but in low and mid end torque and power.
My idea is, that a longer overlap (slightly earlier opening and later closing) will give more time to support the high compression pistons to make their job.
Should the camshaft be built in 1:1 as the stock intake cam or installed offset by one or even several teeth?
Does anyone of you have any idea about this? I am thankful for every hint.
Georg
So I had the engine removed and disassembled. Although the
fault was with the defective cylinder head gasket, I had decided because of the
high mileage of the engine to a complete overhaul. It turned out that all
components were still in perfect condition. Nevertheless, I had decided to
improve the performance a bit.
Therefore, I bought 3 new pistons from JE with a compression
ratio of 10.5: 1, completely renewed the cylinder head, used new valves and
valve guides and had the crankshaft incl. balance shaft and flywheel balanced.
Finally, the engine should run for another 10 years without problems.
After reading a posting by Ulf Penner elsewhere in this forum Mild tuning cam who said, replacing the stock intake camshaft by a stock exhaust camshaft would be an economical way to increase performance slightly. So I got myself an extra exhaust cam and am now faced with the question as to which position/lobe center this camshaft should be optimally installed.
First and foremost, I am not so much interested in increasing the performance in the upper engine speed range, but in low and mid end torque and power.
My idea is, that a longer overlap (slightly earlier opening and later closing) will give more time to support the high compression pistons to make their job.
Should the camshaft be built in 1:1 as the stock intake cam or installed offset by one or even several teeth?
Does anyone of you have any idea about this? I am thankful for every hint.
Georg
. I let them check and clean professionally. The injectors and their injection values are perfect right now.
. There is no need for power at high revs...
