Just need some opinions.
Just need some opinions. Filled up the bottle and got on the dyno. Car was running alittle rich on the .038 fuel jet. 10's a/f and topping out at 11.2 a/f at 6500rpm's. put in a .037 jet and power went from 531/525 to 533/551, a/f topping out at 11.5 then put in a .035 fuel jet and went to 540/548. then did a motor run put down 403/400. My question is would I be safe running a/f up to 12.2 at 6500rpm's. I want it safe, but not too rich.
Does everything look allright in the graph? I still can't get 150rwhp out of my 150 shot. but it's getting closer.. temp was 87 out today when I dyno'd. It's still really rich on the hit, is that normal on nitrous? I guess better rich then lean.
Does everything look allright in the graph? I still can't get 150rwhp out of my 150 shot. but it's getting closer.. temp was 87 out today when I dyno'd. It's still really rich on the hit, is that normal on nitrous? I guess better rich then lean.
Last edited by 06blackGTO; Sep 23, 2010 at 05:13 PM.
Check the plugs instead of watching the a/f gauge. You look at the plugs and it'll tell you that you are too rich.
How much timing you running on the juice? Did you adjust the timing at all after making jet changes?
I'd drop down to a 34-35 jet and it'll pick up more power. Just guessing but I bet you end up around a 33-32 fuel jet.
FWIW on Harris plate with a .72N(200 shot) I'm running a 33 fuel jet and I only run 91 pump gas.
How much timing you running on the juice? Did you adjust the timing at all after making jet changes?
I'd drop down to a 34-35 jet and it'll pick up more power. Just guessing but I bet you end up around a 33-32 fuel jet.
FWIW on Harris plate with a .72N(200 shot) I'm running a 33 fuel jet and I only run 91 pump gas.
I will read the plugs on my next nitrous run. Im running 24 degrees at wot na. and when the nitrous is on, It drops to 18 degrees. My car did not like more then 24 degrees of timing at wot na. I would start loosing power. Thanks for the offer Brad, I talked to your dad today at MC Racing. I plan on getting a nano kit when I get some funds saved up.
I did not adj. the timing when I made the jet changes. I only changed the jet from a .038 to a .037 then a .035... Im being told that 12.2 a/f is alittle lean on stock pistons,so for now I'll prob. put back in the .037 jet. That had me at a 11.7 a/f at wot. I did not have my tuner there today. I used the sniffer from the dynoshop along with my wideband and they were dead on together, but I do understand about reading the plugs, and I will read a couple def. on my next run. thanks for the input.
I did not adj. the timing when I made the jet changes. I only changed the jet from a .038 to a .037 then a .035... Im being told that 12.2 a/f is alittle lean on stock pistons,so for now I'll prob. put back in the .037 jet. That had me at a 11.7 a/f at wot. I did not have my tuner there today. I used the sniffer from the dynoshop along with my wideband and they were dead on together, but I do understand about reading the plugs, and I will read a couple def. on my next run. thanks for the input.
Last edited by 06blackGTO; Sep 23, 2010 at 08:08 PM.
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Just trying to understand the mindset. All of the controllers that have leanout or rich shut down all rely on the WB too.
Just trying to educate myself.
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Verdad Gallardo No different than back in the day reading plugs to dial in your carb. Even reading the plugs will help your n/a tune. The wideband is an average of all your cylinders. By reading the plugs from each cylinder it gives you an accurate view of what's going on in each hole, not an average. Just because they average out alright doesn't mean they're all happy. Look at how many of the faster n2o guys got there and how they tune their set ups.
For example, I went by the wideband for a pull on mine, a/f showed great. Pulled the plugs, it was dead rich. Dropped a couple fuel sizes, graph cleaned up and still showed a nice a/f ratio.
That was the last time I did any tuning on the dyno.
For example, I went by the wideband for a pull on mine, a/f showed great. Pulled the plugs, it was dead rich. Dropped a couple fuel sizes, graph cleaned up and still showed a nice a/f ratio.
That was the last time I did any tuning on the dyno.
Last edited by Twotonefreak; Sep 23, 2010 at 08:44 PM.
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