I just installed the engine, it is a low compression 427
the build has a GT9 cam,GMPP LSX heads and 1700cc injectors (going twin turbo after the break-in)
The issue im currently having is I have a flat spot off idle. if i roll on the throttle it's ok, if i hit it i have a flat spot.
Any input would be great, also can someone confirm I scaled the injectors correctly.
Did you cut the IVT term in half with the double stoich?
I'd be trying to get the MAF and VVE dialed in before worrying too much about what happens when you stab the throttle.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Yes I did...
The file that you posted does not have the IVT Terms (AFR Term) halved. It is still 7.92. It should be 3.96. As soon as you hit the throttle, your spark takes a dive and looks like it is rich. Under fuel transient, warmup, make the min fuel millagrams .0250 or lower--.0150, after you change the IVT terms and see if that helps. You don't have your flex spark tables populated either.
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
I'm learning as I go, I halved the wrong IVT (I did the intake vale temp) I'll correct that and try again.
No problem. With no spark in the flex tables and 80% alcohol, you need some spark in the lower rpm areas.
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
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