Sat here in my lunch hour, i was mulling over why Rotaries flood so easily when only used for a short period of time before they have warmed up. So if anyone can shed any light on the matter, i\'d love to know!
After all, you start them up, move them, turn them off - and they flood! But why?
Oh, and no guess work please! Just either cold hard facts, or well placed theories (with scientific backup reasoning!)!
:)
Ive never had one flood in 3 years :xconfused
as no one has come forward with hard facts, here\'s some guess work!!
i think its something to do with a rotary needing lots of fuel when starting from cold and if it doesnt start straight away, too much fuel has already been put into the chamber and it floods. The first Gen cars dont do it very much but they carb\'d. Also, when fuel is in the chamber, it has trouble evaporating unlike a piston engine.
Yeah, i know and understand that once there\'s too much fuel in there that\'s it. but was curious as to why too much gets chucked in there in the first place.
The other reason might be that you are meant to use 7\'s leading and 9\'s trailing, but as 7\'s cost a stupid amount or are harder to find than rocking horse do do, most use 9\'s alround.
Fish
If you turn the engione off whilst its still in cold start (ie its being run V rich) then theres a chance that not all the fuel is burnt off, with age the injectors can leak whatever is in the rail into the chambers too. When you next try to restart the car it gets another squirt of fuel that adds to the dregs of what is already in there and then you get a snowball effect..........
QuoteIf you turn the engione off whilst its still in cold start (ie its being run V rich) then theres a chance that not all the fuel is burnt off, with age the injectors can leak whatever is in the rail into the chambers too. When you next try to restart the car it gets another squirt of fuel that adds to the dregs of what is already in there and then you get a snowball effect..........
aha - i think that\'s probably the best one yet! The cold start bitty that chucks in a load of extra fuel.
QuoteThe other reason might be that you are meant to use 7\'s leading and 9\'s trailing, but as 7\'s cost a stupid amount or are harder to find than rocking horse do do, most use 9\'s alround.
I\'m running 7\'s and 9\'s and din\'t find either to be the case. RE:Worx stock them at a very reasonable price.
Is it because the rotor tips sweep the excess fuel past the plugs wetting them each time. Whereas the plugs in a piston engine are out of the way up the top of the combustion chamber ?
That too.
Another good reason for flooding is beacsue the water table has gotten too high and the ground water rises beyond the level of the river channels. >I\'ll get my coat<
And the Mask and Flippers too please. :flamed
I run 10\'s and 11\'s the cooler the plug the hard starting is.
Ive flooded twice. Both times was because I had to move my car into the drive way from the road. So its the cold start that did it. I always let my car tick over a bit now before turning it off.
Also the spark plugs are side mounted so when you turn the car off tehy could still be sat in fuel making it hard to start.
I fitted a switch to the fuel pump so if cant let it warm up, i turn the pump off while the engine is running, so hopefully it uses the last of the fuel before it finally dies. also another security measure.
on a fuel injected car if you hold your foot to the floor while cranking the engine it will cut the injectors giving you a better chance of getting a flooded car started.
I thought that the petrol also washed away the oil injected in that is used to help make the apex seal: but I\'m probably wrong.........
@ MikeLMR: does that hold for FDs too? worked for my EGi...
Quotedoes that hold for FDs too? worked for my EGi...
Yes, its one of the techniques used to de-flood the FD.
yup it works on nearly all fuel injected cars.