Fuel and ignition revamping (solved?)
Did a complete revamping of my fuel and ignition system. Went from a FiTech FI with timing control to an 800cfm Edelbrock ASV2 w/ a MSD streetfire ignition box and a MSD pro billet distributor. So for the particulars:
71 Duster
440 according to the builder 10:1 cr
Comp cams XE275HL with 1.6 rockers
727 2200 stall
3.73 gears
I initially set a base timing of 18* with the 18* bushing and heavy silver and light silver springs. 900 ish rpm at idle in park and 800 in drive. I also put the lightest metering springs in the carb. The car runs well but when the fans come on at idle in gear it just sounds like it’s off a bit. The Rpms fluctuate and just doesn’t sound right to me. It doesn’t flood or die just again doesn’t sound/feel right. I’ve tried to add some advance and that helps, but then my total timing gets way up there and that kinda scares me. I’m pretty new to this tuning thing so any tips, tricks, advice would be appreciated. Cam card attached. I’m sure the gurus here will have plenty of questions and comments and I wii try to answer to the best of my ability. Thanks folks.
Did a complete revamping of my fuel and ignition system. Went from a FiTech FI with timing control to an 800cfm Edelbrock ASV2 w/ a MSD streetfire ignition box and a MSD pro billet distributor. So for the particulars:
71 Duster
440 according to the builder 10:1 cr
Comp cams XE275HL with 1.6 rockers
727 2200 stall
3.73 gears
I initially set a base timing of 18* with the 18* bushing and heavy silver and light silver springs. 900 ish rpm at idle in park and 800 in drive. I also put the lightest metering springs in the carb. The car runs well but when the fans come on at idle in gear it just sounds like it’s off a bit. The Rpms fluctuate and just doesn’t sound right to me. It doesn’t flood or die just again doesn’t sound/feel right. I’ve tried to add some advance and that helps, but then my total timing gets way up there and that kinda scares me. I’m pretty new to this tuning thing so any tips, tricks, advice would be appreciated. Cam card attached. I’m sure the gurus here will have plenty of questions and comments and I wii try to answer to the best of my ability. Thanks folks.
