Thread: Riva Stage 3 dyno results are up
08-01-2006, 03:21 PM #1
Riva Stage 3 dyno results are up
285 hp at 8400 rpm ... and check out the A/F ratio, higher, in the 13s all the way ...
08-01-2006, 03:38 PM #2
- Join Date
- Feb 2006
8580 it made 295 thats good if it true
08-01-2006, 03:43 PM #3
08-01-2006, 03:47 PM #4
Looks like the new dyno is more accurate or something. The stage 2 shows a decrease in hp after 8100.
Can anyone explain why the stage 3 continues to go up and the old info for stage 2 goes down.
I don't understand the old one.
Also is the higher A/F the better ? I thought 12 was the magic number. Does this mean there is room for more boost, with the A/F ?
08-01-2006, 03:55 PM #5
More boost would just make it leaner than it already is.
08-01-2006, 03:56 PM #6
08-01-2006, 03:58 PM #7
Lower numbers = rich
Higher numbers = lean
08-01-2006, 04:00 PM #8
Originally Posted by Kinchyle
- Join Date
- Oct 2005
08-01-2006, 04:05 PM #9
I thought people were noticing leaner A/F ratios in the lows and mids and it actual getting richer with the higher rpms. This shows a gradual increase with slight fluctuation not usual from peoples A/F posts. And this is with 50lb injectors. Is it the ECU ?
This is just throwing me off and I'm already ignorant when it comes to this stuff.
08-01-2006, 04:08 PM #10
- Join Date
- Jul 2006
Well PEREFCT air fuel ratio in the car world is 12.8-13.2. When we are running turbos on the street we like to see air fuel no higher a number than 12-12.5 to 1 . Leaner air fuel ratios like 13.5 - 13.8 to be sure will produce more power to a point BUT the engine is on the verge of being too lean. Perhaps watercraft are different but probably not much since they are all 4 strokes. In Nitrous applications 12.5 is about as lean as you want to see with premium fuel.
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