Thread: Rich AFR
02-06-2011, 09:57 PM #1
Hey guys, finally got to take my ski for a good run after replacing the HG. It was pulling really hard and I didn't have an issue with it all day.
However I am only seeing 8120rpms with the 87mm stock nozzle, I was expecting to be on the limiter.. My lc1 gauge is showing 11.0 at WOT. Now I realise this is rich, but is it rich enough that it would affect performance?
This was on a 70degree day with 80degree water temp, and high humidity..
02-06-2011, 09:59 PM #2
I was thinking that maybe the lc1 isn't calibrated correctly, as I am very surprised to see the ski is soo rich at WOT. Idle Afr is showing mid 13's and cruise is mid 12's
02-06-2011, 10:02 PM #3
Yes, that rich wil hurt performance. Get a rrfpr and dail it in.
02-06-2011, 10:23 PM #4
I was nearly thinking the afr's would be closer with the stock 42's, maybe I should try the 42's with rrfpr..
02-06-2011, 10:42 PM #5
increasing the fuel pressure with boost will make it even richer...11 af .if you get it to 11.7 11.8 you will pick up about 300 rpm....
02-07-2011, 12:46 AM #6
- Join Date
- May 2008
- Osage Beach, MO
Throw the 42's back in and try it. I've heard bigger injectors or rrfpr aren't needed with a improvement of just a new impeller wheel. Never hurts to try. If that doesn't work, then get the rrfpr with the 42's. Let us know what you find out
02-07-2011, 04:09 AM #7
That doesn"t suprise me as you are in South Australia!!!! Weather is similar to here in Perth and i noticed the same with my ski aswell in this summer heat. I would put the RRFPR in and try the 42"S with that XX you have . My Bkit (14.5 psi) would run just right with 42"s in Summer but i had to put the 48"s back in for winter!!!!!!
02-07-2011, 05:59 AM #8
I am running 48's with just a Riva X sc upgrade and a rrfpr with not as much boost as you and I was able to set my fuel pressure to get my afr's correct.
02-07-2011, 06:25 AM #9
Never mind. lol I am running a Riva ecu. I thought you were too.
02-07-2011, 01:51 PM #10
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