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Question about petrol/gasoline engine oils
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tautech:

--- Quote from: joeqsmith on August 18, 2023, 12:51:50 am ---Higher boost and cooling over the C16.  I spray a small shot with the bike not having an intercooler.  Drops the temp a fair bit.

--- End quote ---
Here we use icebox intercoolers, ice replenished after each pass.

Launch boost is critical too and a 2 step tune provides an ignition cut at max revs and when it comes back ON the unburnt fuel provides a boost lift of a momentary additional 20psi.
Getting that additional boost timed with the launch creates those magic passes.....and breaks stuff if it isn't strong enough.  :-BROKE
joeqsmith:

--- Quote from: tautech on August 18, 2023, 03:19:46 am ---Here we use icebox intercoolers, ice replenished after each pass.

--- End quote ---

Too large for my bike.   The only thing I use ice for is filling the N2O and CO2 tanks.  My street bike uses an intercooler, but its a bit more modern.



--- Quote from: tautech on August 18, 2023, 03:19:46 am ---Launch boost is critical too and a 2 step tune provides an ignition cut at max revs and when it comes back ON the unburnt fuel provides a boost lift of a momentary additional 20psi.
Getting that additional boost timed with the launch creates those magic passes.....and breaks stuff if it isn't strong enough.  :-BROKE

--- End quote ---
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.     

***
The parts that would normally break with the bike were transmission gears.   Lots of information out there about heat treating and such.  I had Robinson make a 1-2 auto transmission for me.   The down side with this is you can't chop the throttle until after the first shift if something goes wrong or $$$.   So hang em out there.

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. 

https://github.com/RomRaider/RomRaider

https://www.robinsonindustriesinc.com/
mendip_discovery:
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.

I do enjoy some of the utterly useless manuals you get for things. It specifies a brand and part number of the oil but little about what grade of oil it is. Of course the the FB group of the owner doesn't help as they are just as clueless as they have a garage that does the work for them.

I have wondered from time to time if the recommended oil is still the best oil to use. With modern synthetic oils and a different knowledge of oils would the 10w40 that I use on a 30 year old bike actually be better off with a 5w50.
John B:

--- Quote from: mendip_discovery on August 18, 2023, 02:36:55 pm ---I do enjoy some of the utterly useless manuals you get for things. It specifies a brand and part number of the oil but little about what grade of oil it is. Of course the the FB group of the owner doesn't help as they are just as clueless as they have a garage that does the work for them.

--- End quote ---

Over the last several years I've noticed lawn equipment and bicycle getting worse in their documentation and manuals. They used to contain maintenance information and instructions, now everything is "take it to a authorised service centre".

The last example that really pissed me off was the documentation for the shimano brakes on my bicycle. I wanted to find the model number of the pads and the manual wouldn't list them, all said was "take it to a authorised service centre".
langwadt:

--- 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.
All large ship engines are 2 stroke semi-diesels running on fuels more like crude oil than anything refined we consumers use.

--- End quote ---

only out to sea where sulphur content is less restricted, in restricted areas, close to the coast and in port they run on diesel (gas oil)

a regular four-stroke gasoline engine is also only lubricated at the bottom
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