Got the SP-38 this afternoon via LBC, free shipping from Manila. I received the device with a hose on the device with a hose clamp attached and a Y connector with an automotive hose with hose clamps all ready for attachment to the PCV line.
On a gasoline fueled engine, the device is installed on the PCV line or any port with greater vacuum than the PCV line as per installation instruction. Installed mine on a large port with highest vacuum. This is also an air bleed device but unlike any air bleed device with just a tiny hole and a filter, this one will let the air pass through the device with some stuffing in it other than the filters. I added a couple of cotton balls and an outer covering of four layers taffeta cloth secured by electrical tape on its intake port to improve filtration.
I'm using 93 RON fuel from autogas, without the device the engine will still show some knock on heavy load during sudden acceleration. To avoid engine knocking and if you want to stay with a heavy foot most of the time one have to retard a bit of ignition timing or refuel a higher RON rating fuel like 95 RON and above.
Once installed with the device valve in closed position, start the engine (NOTE: engine must be warmed up first before installation and re-tuning) and start opening the valve very slowly until you reach that spot right before the engine will start to stall. On a carburetor engine, you are adding more air this way while bypassing the carburetor - meaning more air lesser fuel. Usually this setup with an air bleed will have some misfire before stalling but with the device it did not. I already have a leaner setting since I already have an air bleed setup but I was able to bleed a little further. During my first test drive on my usual route, I was surprised to experience no engine knocking no matter how I tried to induce it.
It's like refueling a more expensive fuel (higher RON rating) or retarding the timing just to avoid any knocking when flooring on heavy load. For me, that is something no air bleed can do, there must be some chemical reaction happening that resulted to no more knocking.
Regarding the fuel savings, no record yet until my next refuel - full tank to the brim on the same gas pump at the same car placement. However, since I was able to lean the setting further, I am expecting some savings equivalent and I am happy to know that performance is compensated with how the device is working. When I arrived home while the engine is still idling, one good thing I noticed with the exhaust gasses is similar to that of having hydrogen from water as supplementary fuel - no foul smell which we usually found from most gasoline engines. This initial observation is already good for me. I'll advance the ignition timing next and see some more improvement.
Thank you for posting this device on this forum that I am able to test it for myself with really nice instant results.
Looking forward for long term positive results.
Originally Posted by assidclown11
Reply With Quote
Posting Permissions
