Tezz wrote:
Johnny
When using a wide band 02 with the race or the leaded fuels do you have to make any allowances in your readings , what i mean do you set the tune richer or leaner to compensate for any effect this fuel or nitrous come to think of it has on what the wideband displays on your A/F gauge , I know the dyno shops dont like to tune bikes running race fuels
I seam to rember Dave saying on his bike the wide band reads richer than what his plugs show
I dont run race gas as i ride bike to track but this may change next year along with a wideband and EGT
Thanks
Tezz
If i get your meaning Tezz, you're pretty much talking about different stoich for different fuels. Pump pee has a stoich of 14.7, so running AFR of 11 would be on the rich side NA while accelerating. Add gas and this changes as theres more oxygen in gas so its not as rich but still safe. Now if your race fuel has a stoich value of say 12.5, then obviously you need to read accordingly, so ideally you want to be nearer 10 AFR. How you determine the stoich value of a fuel im not sure, but am looking in to it.
This is obviously where FI and the max extreme score well, as with FI you can set a target AFR and with the max you can set an AFR window, with the race version on REVO i beleive you can set target AFR also, which with quality components should read and adjust in mili seconds and save your engine. Also positioning will be a key factor here, again probably a science in itself lol. But if you can read each cylinder before run and then on pass measure the average you should be good, which is what i think Johnny was saying?
As an aside, those values on the sunoco Johnny, they are measured using the same test procedure, i did check all the test numbers to make sure. 15 Deg C is near as damn it 60f, but as long as the test numbers are the same the results are comparible.
Steve