Thread: Are #42's too rich??
09-16-2009, 01:25 AM #1
Are #42's too rich??
Just got all the mods sorted as per sig, incl Green charger, fizzle IC and 42 inj from an X. Running it off the hose just checking for leaks I couldnt help but notice how rich it was running. Every press of the throttle was making a noticeable amount of black smoke from the exhaust. I was only revving up to about 5000 - 5500 RPM and it was revving crisp and clean but did idle a bit rough.
I have read on many posts that the 42's are the proven injectors to run on such a set up, so I am assuming once in the water and with WOT runs it should be good.
Is it normal just at low RPM that it will run so rich or may I have another issue??
09-16-2009, 01:40 AM #2
09-16-2009, 06:36 AM #3
You might consider a rrfpr,then your running ok at low and high rpm's
09-16-2009, 07:49 AM #4
09-16-2009, 08:08 AM #5
Better to set the AFR to make sure all is good. If the mixture is too rich it will hold the ski back for you... if the other way... which I doubt... POP..!!
Running too rich a mixture will give rise to bore-wash. This is when excess fuel washes the cylinder bores with fuel, displacing/diluting the oil. The lubrication can start to fail on the liners/piston interface.
Plus like it has been said, the fuel is absorbed into the rest of the lubrication system(oil), and it looses its properties to protect the bearing surfaces as well.
09-16-2009, 08:30 AM #6
- Join Date
- Jul 2008
- Aurora Ontario Canada
Mine runs perfectly crisp with
09-16-2009, 08:33 AM #7
I think the best thing for you is installing a afr gauge.
Have to weld it to the j-pipe.
Best ratio is around 12-1 .(air-fuel)
Otherwise you have no clue wat you'r doing.
09-16-2009, 06:34 PM #8
09-16-2009, 07:25 PM #9
very similar to mine ...all is well...so far...
there is rich and then rich ... a little rich is just safe...way rich will contaminate your oil ..i change my oil every 25 hours anyway .give or take a ride or two
09-17-2009, 02:01 AM #10
I put the 38's back in and it seams to run just as rich. Maybe its just me as I dont often pay too much attention when I run it out of the water.
Anyway AFR gauge should tell me.
Heres a quick vid of how it sounds. Sorry bout the sound goin fuzzy,maybe I should have filmed it outside the garage
Thanks again for all the help, advice and honest dealings from many guys on this forum.
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