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| Question about petrol/gasoline engine oils |
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| joeqsmith:
--- Quote from: langwadt on August 18, 2023, 07:51:08 pm --- --- Quote from: tautech on August 17, 2023, 08:01:31 pm ---Diesel itself is an upper cylinder lubricant so only the bottom end requires lubrication. ... --- End quote --- ... a regular four-stroke gasoline engine is also only lubricated at the bottom --- End quote --- My 4-stroke bike engines pump the oil from the crank to the top end for the cams, lifters.... But yea, I know what you meant. Then we get to the guides. https://patents.google.com/patent/US6599345B2/en |
| tautech:
--- Quote from: joeqsmith on August 18, 2023, 01:43:51 pm --- Yes, that's how its done. The 2-step is part of my MSD ignition. It's a balancing act on launch of tire pressure, boost, clutch... Clutch tuning is a major part. Boost is about 7PSI at launch. Very tame. My street bike is injected. The 2-step is done with the primary ECM. You have the option of cutting fuel, ignition or both. The primary ECM is stock. I use ROMRaider to hack it. --- End quote --- Not heard of ROMRaider but not at all surprised such equipment has evolved. One 13B powered Mazda drag car running a MSD setup had ongoing issues they couldn't sort in that it would go off song down the track when boost, fuel and RPM were all near peak and I put a scope on the ECU coil outputs to find one output down enough to have the fire go out when ignition was under high stress. The complete MSD system got replaced and most here are running Motec or Haltech ECU systems now. --- Quote from: mendip_discovery on August 18, 2023, 02:36:55 pm ---I miss the smell of Caster Oil in the 2-stokes I have. But you can never beat the smell of a 2-stroke in the morning, smells like victory. Never knew there was a difference for AC or WC engines, I just bought good quality oil. --- End quote --- From my experience any 2 stroke oil highly dyed/tinted is to be avoided especially for premix. We used to run trial mixes of anything new pushed by oil company reps and leave them in sealed glass jars on the windowsill in full sun for at least a month to see if they would turn to gel. In many ways the problems dyed 2 stroke oils were trying to help with, (visual ID of mix) the dies used instead promoted geling and fuel system clogging not to mention possible degradation of fuel system components. However as the decades have rolled by better choices of fuel storage containers are now available so to have different colored ones to more simply identify which is a 2 stroke mix. YMMV |
| joeqsmith:
I had an old MSD ignition that you had to insert the resistor to set the 2-step. It worked fine. Later switched to their MC1 digital. I did have one die on me. I was able to dig out enough potting to troubleshoot it and replace the boost converter IC. I'm not sure what killed it as the bike uses a total loss system (no charging). The coils are separate. My street bike is using a product from your neck of the woods (Microtech out of Gladesville Australia). This second system runs in parallel with the original to supply enough fuel to the motor. Using a Porshe 911 fuel pump on it. |
| langwadt:
--- Quote from: joeqsmith on August 18, 2023, 09:09:41 pm --- --- Quote from: langwadt on August 18, 2023, 07:51:08 pm --- --- Quote from: tautech on August 17, 2023, 08:01:31 pm ---Diesel itself is an upper cylinder lubricant so only the bottom end requires lubrication. ... --- End quote --- ... a regular four-stroke gasoline engine is also only lubricated at the bottom --- End quote --- My 4-stroke bike engines pump the oil from the crank to the top end for the cams, lifters.... But yea, I know what you meant. --- End quote --- big 2-stroke marine diesels also have valves, cams, and lifters ;) |
| tautech:
--- Quote from: joeqsmith on August 18, 2023, 11:34:04 pm ---My street bike is using a product from your neck of the woods (Microtech out of Gladesville Australia). This second system runs in parallel with the original to supply enough fuel to the motor. Using a Porshe 911 fuel pump on it. --- End quote --- Yep, forgot about Microtech, anther good product. In the last decade or 2 technology has offered massive improvement to high performance needs as even low budget teams all have laptops to extract run logs and analyse where improvements are needed and of course the other benefit is identifying race system faults and the conditions that might lead to them. Such capability would have found the MSD ignition was at fault rather than feedback from the jockey over several meets and runs knowing there was something wrong but what ? Lucky the guy next door had a DSO and could verify their hunch and capture it. :) |
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