Star Mazda recommendations for renesis
#1
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Star Mazda recommendations for renesis
good read.
two things that caught my eye:
1. they recommend to shoot for AFR of 13!?
Engine Vitals: Lambda
Lambda is the measure of the amount of oxygen in the exhaust stream. The value expressed is a percentage of the stoichiometric air/fuel ratio 14.7:1.
Air/fuel ratio can be calculated by multiplying the lambda value monitored by data system by 14.7
(ex: .90 Lambda translates as (.9 x 14.7 = )13.23 Air/fuel ratio
Operating Range = .87 - .91, aim for .89
2, they state that lambda sensor (primary O2 sensor on our cars) is wear item and should be replaced just like spark plugs as it looses sensitivity over time
Engine Vitals: Lambda continued
There are two methods of lambda monitoring: ECU or ADL (the ADL reads approximately .2 higher). Lambda bung location should be toward rear of pipe, 6” from muffler junction (be sure to accommodate for possible interference with the bellhousing). The depth of the sensor in the pipe should be so that the tip is flush with the inner wall of the tube.
Lambda sensor precision:
Sensor life
Sensors tend to wear out more quickly when
closer to header. These are consumable parts
much like the spark plugs and are
manufactured similarly
Full document here
two things that caught my eye:
1. they recommend to shoot for AFR of 13!?
Engine Vitals: Lambda
Lambda is the measure of the amount of oxygen in the exhaust stream. The value expressed is a percentage of the stoichiometric air/fuel ratio 14.7:1.
Air/fuel ratio can be calculated by multiplying the lambda value monitored by data system by 14.7
(ex: .90 Lambda translates as (.9 x 14.7 = )13.23 Air/fuel ratio
Operating Range = .87 - .91, aim for .89
2, they state that lambda sensor (primary O2 sensor on our cars) is wear item and should be replaced just like spark plugs as it looses sensitivity over time
Engine Vitals: Lambda continued
There are two methods of lambda monitoring: ECU or ADL (the ADL reads approximately .2 higher). Lambda bung location should be toward rear of pipe, 6” from muffler junction (be sure to accommodate for possible interference with the bellhousing). The depth of the sensor in the pipe should be so that the tip is flush with the inner wall of the tube.
Lambda sensor precision:
Sensor life
Sensors tend to wear out more quickly when
closer to header. These are consumable parts
much like the spark plugs and are
manufactured similarly
Full document here
#2
No respecter of malarkey
iTrader: (25)
you’re like a decade late to that party, another 5 or more years to the original party since that’s the later revised version
it’s all been extensively discussed on this forum since then; yes, shoot for 13.1:1 AFR on gasoline fuel, don’t ever-rev, don’t let EGT be sustained over 1650*F
fwiw, the link is from the noob faq website; maybe you should do some more in-depth reading while you’re on there
one of my favorite vids, 270 bhp Renesis at full song
.
it’s all been extensively discussed on this forum since then; yes, shoot for 13.1:1 AFR on gasoline fuel, don’t ever-rev, don’t let EGT be sustained over 1650*F
fwiw, the link is from the noob faq website; maybe you should do some more in-depth reading while you’re on there
one of my favorite vids, 270 bhp Renesis at full song
The following 2 users liked this post by TeamRX8:
kevink0000 (02-21-2021),
Shaozhou Zhang (01-27-2023)
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