Will guthrie Posted January 20, 2021 Report Share Posted January 20, 2021 Hi there, Working through the process of road tuning my 1995 wrx sti with a pnp link g4+ and noticed while trying to hold my engine speed in the centre of the column for the quicktune function that the engine rpm shown on my gauge in the dash and engine speed shown on the laptop are around 250 rpm out. Generally stays about that much out throughout the rev range. Is this just inaccuracies of the old rev gauge? Or could this be caused by the trigger input filtering? Ive left the trigger settings as default for the base map of my car. ( version 3 sti) Thanks for help in advance Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 20, 2021 Report Share Posted January 20, 2021 Yes, most factory tachos are rarely accurate, in fact I suspect they purposely make them read higher in some models. You may be able to improve it by making a small change to the multiplier in the Tacho menu - although this will have more effect at high revs than lower. Make the multiplier smaller to make the tacho read lower. Quote Link to comment Share on other sites More sharing options...
Will guthrie Posted January 20, 2021 Author Report Share Posted January 20, 2021 Good th have the peace of mind, thank you :) Quote Link to comment Share on other sites More sharing options...
Vaughan Posted January 21, 2021 Report Share Posted January 21, 2021 You could also use a gp pwm function instead of tacho function which will give you the ability to add an offset Quote Link to comment Share on other sites More sharing options...
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