05-20-2019, 02:46 PM
First let me say how very useful all the FixKick info has been for my project.
I have a '91 Tracker with 8 valve engine. Have just re-assembled freshly machined engine with .020 over pistons and a total of .020 off cylinder head and block for a bit more compression. My machinist calculated that lowering the head by .020 would retard cam (and also ignition) timing by @3 degrees so the only other thing that is not stock is a 4 degree offset key that advances the crank drive. Timing is set at stock 8 degrees BTDC which should be @ 1 degree advanced. Engine runs great at idle, accelerates fine, runs smooth at steady throttle setting below 2,800 RPM but stumbles noticeably above that (only with steady throttle setting) -accelerates right a way to higher RPM but still lurches at steady throttle setting at any RPM above 2,800 RPM
Any ideas on where to look to solve this.
Thanks,
Steve (aka Annabelle)
I have a '91 Tracker with 8 valve engine. Have just re-assembled freshly machined engine with .020 over pistons and a total of .020 off cylinder head and block for a bit more compression. My machinist calculated that lowering the head by .020 would retard cam (and also ignition) timing by @3 degrees so the only other thing that is not stock is a 4 degree offset key that advances the crank drive. Timing is set at stock 8 degrees BTDC which should be @ 1 degree advanced. Engine runs great at idle, accelerates fine, runs smooth at steady throttle setting below 2,800 RPM but stumbles noticeably above that (only with steady throttle setting) -accelerates right a way to higher RPM but still lurches at steady throttle setting at any RPM above 2,800 RPM
Any ideas on where to look to solve this.
Thanks,
Steve (aka Annabelle)