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Old 11-01-2008, 08:06 PM   #1
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Default Laloosh standback tuning
alright here are the dashhawk datalogs results
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Old 11-01-2008, 08:27 PM   #2
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this is after he did a tune for u?
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Old 11-01-2008, 09:12 PM   #3
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i didnt touch that yet.

What are your mods...it looks like you need fuel pump. Im not sure if you even wanna bother with it before getting it.
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Old 11-01-2008, 09:34 PM   #4
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I'm actually waiting on the fuel pump parts and a ptp reworked turbo
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Old 11-01-2008, 09:36 PM   #5
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mods are (mazdaspeed cold air intake w/straightner,3.5 ets tmic,cpe downpipe catless,su boost tubes,hks blowoff valve vta)
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Old 11-03-2008, 05:13 AM   #6
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I'm new to tuning these cars, what's with all the AFR spikes?
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Old 11-03-2008, 08:18 AM   #7
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sub, these standback threads are awsome!
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Old 11-03-2008, 12:00 PM   #8
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Hey Miguel! Thanks for pointing me towards this thread.

Originally Posted by Laloosh View Post
i didnt touch that yet.

What are your mods...it looks like you need fuel pump. Im not sure if you even wanna bother with it before getting it.
I'm going to agree with the resident expert here and suggest that we reconvene when you have an upgraded fuel pump in there. It probably isn't wise to be putting the car into wide open throttle runs when the fuel pressure is dropping like that. And to try to make sense of fueling while fuel pressure is erratic like that will likely make us chase our tails here. So throw a better fuel pump in there and then let's play!
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Old 11-03-2008, 02:26 PM   #9
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So I see the fuel pressure drop to 1400, then the AFR spikes to the heavens. What do people like to see as far as fuel pressure? Should it be consistent across the entire RPM range or does it tend to dip a little?
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Old 11-03-2008, 02:40 PM   #10
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Originally Posted by 6-Speed-6 View Post
So I see the fuel pressure drop to 1400, then the AFR spikes to the heavens. What do people like to see as far as fuel pressure? Should it be consistent across the entire RPM range or does it tend to dip a little?
The car has a feedback loop attached to the fuel pump so it always tries to target ~1885psi under high load conditions. So if you deviate from ~1800psi by any great margin that's probably a good indicator that the pump is out of steam. With that said, you shouldn't expect a perfectly flat reading of fuel pressure either, and that's just based on the operation of the spill control valve. The ECU has to "guess" when to open the spill control valve based on fuel delivery, and it doesn't always time things perfectly.

I hope that helps!
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Old 11-03-2008, 03:09 PM   #11
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so if you see lower than 1800, then fp upgrade or at least some internals...yes?
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Old 11-03-2008, 03:11 PM   #12
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Yes, that helps a lot. I came from an SRT-4 and I am just learning this new engine and CPU. I am curious why he was never even able to hit the optimum fuel pressure when he was accelerating. According to his post he only has a downpipe and an intake?
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Old 11-04-2008, 09:05 AM   #13
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