Howard Coleman Posted May 21, 2021 Report Share Posted May 21, 2021 i was visiting with Victory Motorsports Loganville, Ga today and expect to be doing some tunng with them. Edwin is a Link guy and we were attempting to discern why my knock readings with my V88 over 8 years typically were around 25/30 tops while they are 55/65 with my G4X Extreme. same 2 Bosch (Mazda RX8 P/N) sensors on my Third Gen FD RX7. same gain setting. i have added as much as 28% ethanol to 93 octane. i run 1000 CC of meth as AI (same as before)... i even did a 60/40 meth/water combo, then tried Boostane. this currently is all at modest boost.. 15/16 with an EFR9180 zero change in the knock readings. i did a comp test on my motor and it is 100%. it appears the only changes in the G4X map are i switched to the actual knock cps (3500). the V88 was set at 5500 which was the closest i could get to 3500. gain was the same. i reset the G4X to 5500 and came up with the same 55/65 readings. one difference is i was logging at around 6 per second with the V88 and it appears i am around 16/S with the G4X. i doubt this is a factor since i have over 100 V88 logs and over 50 G4X logs... both consistantly different. any help on this appreciated... Edwin did ask me about my USB cable. he showed me a cable that had two "filters." i was not aware of such a cable. is this new? he said that the G4X is so sensitive that it can pick up background noise and so the new cable. i checked the Link site and did not see such a cable. would i benefit from it and is it available, P/N. thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 21, 2021 Report Share Posted May 21, 2021 It is completely different hardware and firmware, comparing knock settings to a 10 year old V88 is irrelevant. You need to tune the knock system so that it reports knock only when there is actually knock. I would suggest using the much better normalised knock mode in G4X. The ferrite beads were added to the USB cables a few months back. Not needed unless you are having a comms issue. Quote Link to comment Share on other sites More sharing options...
Howard Coleman Posted May 21, 2021 Author Report Share Posted May 21, 2021 thank you re the knock system aspects. my connectivity is excellent so i won't be needing the uprated cable. Quote Link to comment Share on other sites More sharing options...
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