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-   -   Fuel is getting into oil catch can (https://www.miataturbo.net/engine-performance-56/fuel-getting-into-oil-catch-can-54734/)

railz 01-03-2011 01:41 PM

Fuel is getting into oil catch can
 
For the second time after emptying out my oil catch can which was full to the brim! about 99% of the fluid inside of it was fuel while the rest 1% was oil residue.

I know this isnt normal but should i suspect my current set-up?
Its a freshly fully built motor which has only 3k+ miles so far.
running e85
1000cc injectors
walbro 255 FP

Could it be the 1000cc's that are pushing way to much fuel?

Is this something other forum members have encountered before?

hustler 01-03-2011 01:57 PM


Originally Posted by railz (Post 675272)
The idea to my problem I THINK is that its the 1000cc's that are pushing way to much fuel?

I was going to give this some though, then I read the choice quote above and decided to mock you instead.

railz 01-03-2011 02:06 PM

jerk

hustler 01-03-2011 02:08 PM


Originally Posted by railz (Post 675277)
jerk

If there were "soooooo muchhhhhhh fuellllllll" what would your AFR look like?

Doppelgänger 01-03-2011 02:08 PM

Well...most of the "gunk" that you find in a catch can is condensed fuel and water vapors...not really a lot of pure oil content. Might want to send your oil off for analysis too. Like Hussy says, how are the AFRs? How many miles since you installed it/checked it last? How full was it? How big is the catch can?

y8s 01-03-2011 02:32 PM

drain your oil pan and see what's in there too.

railz 01-03-2011 03:06 PM

AFR's are spot on normal. i changed the oil not to long ago but even before the oil change it was doing the same.
The can was full to the top and this was all with less then 100miles of driving. Its as big as a 16oz bottle

Savington 01-03-2011 03:32 PM



I get significant ethanol content from the catch can too. Hustler runs 11.5:1 and gets fuel contamination, and we are running afrs closer to 9:1. Expect to change your oil A LOT.

railz 01-03-2011 04:29 PM


Originally Posted by Savington (Post 675300)

I get significant ethanol content from the catch can too. Hustler runs 11.5:1 and gets fuel contamination, and we are running afrs closer to 9:1. Expect to change your oil A LOT.

Got it, thanks

but do you have an idea why we get more e85 contamination vs regular pump/race gas?

Savington 01-03-2011 09:58 PM

..seriously? I just told you - we run 20% richer AFRs.


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