'7747 Tuning Help
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Joined: Jul 2020
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From: Minnesota
'7747 Tuning Help
Hi,
I've read bits and pieces of the DIY Tuning FAQs, so I'm still learning.
I know my way around TunerPro RT and have a Burn2 setup. (Using $42-1227747-V5.2.adx and $42-1227747-V5.9.3.xdf in TunerPro)
I've wrote a chip using the ASDU.bin posted on the gearhead forums, and the car runs okay.
I'm having issues with knock counts and occasionally a backfire through the intake (when accelerating hard is when the backfire tends to happen)
I've changed the initial spark advance to 8 degrees in the bin, that's where the distributor is set to with the wire unplugged (car idles best there)
Also have played around with the excel spreadsheet tool to fix the BLMs.
I've got a data log of what its doing currently, if anyone could look at the log and point me in the right direction that would be greatly appreciated!
I've read bits and pieces of the DIY Tuning FAQs, so I'm still learning.
I know my way around TunerPro RT and have a Burn2 setup. (Using $42-1227747-V5.2.adx and $42-1227747-V5.9.3.xdf in TunerPro)
I've wrote a chip using the ASDU.bin posted on the gearhead forums, and the car runs okay.
I'm having issues with knock counts and occasionally a backfire through the intake (when accelerating hard is when the backfire tends to happen)
I've changed the initial spark advance to 8 degrees in the bin, that's where the distributor is set to with the wire unplugged (car idles best there)
Also have played around with the excel spreadsheet tool to fix the BLMs.
I've got a data log of what its doing currently, if anyone could look at the log and point me in the right direction that would be greatly appreciated!
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: '7747 Tuning Help
Not sure how much I can help... As for the intake backfire on heavy acceleration, this is typically from not enough spark advance and/or a lean mixture. It could be due to a fuel delivery issue. It is important to monitor fuel pressure as even the slightest drop will affect delivery.
As for the base distributor setting, it is really only used during cranking and limp mode (ECM not running). As long as the physical base and initial SA in the BIN match, the overall at-crankshaft SA won't change.
As for the engine, is this a stockish L05 with the stock swirl port heads? If the heads are not then the SA tables need to be very different. The swirl port heads require very little SA. While non-swirl port heads will need more SA.
RBob.
As for the base distributor setting, it is really only used during cranking and limp mode (ECM not running). As long as the physical base and initial SA in the BIN match, the overall at-crankshaft SA won't change.
As for the engine, is this a stockish L05 with the stock swirl port heads? If the heads are not then the SA tables need to be very different. The swirl port heads require very little SA. While non-swirl port heads will need more SA.
RBob.
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