i have a '99 venture 700. at present, it is burning oil at a 32:1 ratio. is there a way to lean that out? should i? what are other people seeing?
thanks
thanks
TurboDiesel
New member
Just curious, but how do you know that your sled currently runs at 32:1 mix? Have you got that spec from a manufacturer, or is that something that someone just told you? There are ways of finding out, but by just believing what someone randomly tells you can be downright dangerous for your engine's well being.
Seriously, why the heck would you want to LEAN out your engine? You like blowing them up and then rebuilding them? Geeze, what a bad idea!
If you are looking for better performance and your location allows for it (not way above sea level, where the air is thinner, etc.) then you can often get away with going leaner with your carburetor main jets a size or 2. Usually, factory settings are purposely set a little on the richer side, to prevent engine siezures due to overly lean fuel conditions.
Of course, if you install performance exhaust pipe(s) on your sled, you'd better go richer on your main jets, at least 2 sizes.
Bottom line, do NOT mess with your oil injection system, OR the mixture rate of fuel that you run if you are pre-mixing your gas/oil. You will only set yourself up for problems and expensive failures. There are many reasons that oil mix ratios were derived as they were from the manufacturers.
Messing with your carburetion is bad enough for most people (because they don't know what they are doing), but you really should NEVER modify your oil injection system (or change your pre-mix ratios, if applicable).
Seriously, why the heck would you want to LEAN out your engine? You like blowing them up and then rebuilding them? Geeze, what a bad idea!
If you are looking for better performance and your location allows for it (not way above sea level, where the air is thinner, etc.) then you can often get away with going leaner with your carburetor main jets a size or 2. Usually, factory settings are purposely set a little on the richer side, to prevent engine siezures due to overly lean fuel conditions.
Of course, if you install performance exhaust pipe(s) on your sled, you'd better go richer on your main jets, at least 2 sizes.
Bottom line, do NOT mess with your oil injection system, OR the mixture rate of fuel that you run if you are pre-mixing your gas/oil. You will only set yourself up for problems and expensive failures. There are many reasons that oil mix ratios were derived as they were from the manufacturers.
Messing with your carburetion is bad enough for most people (because they don't know what they are doing), but you really should NEVER modify your oil injection system (or change your pre-mix ratios, if applicable).
Bluemonster2
New member
TurboDiesel said:
x2 I see alot of guys shootting for 50-1 when they calculate the oil ratio and I must say that this will give you no performance gain. Maybe a powervalved motor will stay cleaner but parts wear out quicker. And most people dont know that more oil makes more power when jetted properly!!! This has been known since the late 70s.
It's a simple calculation. Gallons x 128 / ounces of oil used = ratio. No- I dont want to blow my engine. Kinda a dumb question. Who would?? I'm simply wanting the engine to run as designed. If there is an adjustment and. 32:1 is wrong, I'd like to adjust it back to specs. Pumps fail. Things get out of specs. Turbo, you will find this over time.
nytrodave
New member
I ran my 700sx at 42/1 for 10,000 trouble free miles. Adjust the oil pump cable with the adjusting nut covered by rubber in the middle of the length of the cable. Loosen the jam nut and turn the adjuster one turn CLOCKWISE. Tighten the jam nut and push the cable housing and rubber cover back together . Run and recalculate your ratio, repete as needed
Thanks nytro. Very helpful!
also remember the oil pump is variable. at 1/4 throttle running 6,000 rpm it might only be 100/1 where at wot at 8,000 rpm it might be at 32/1. I would keep within specs if it where mine. Good luck Al