Flickering lights Lopey cam?
Drifting
Joined: Oct 2003
Posts: 1,486
Likes: 10
From: Big Pine Key FL
It's not just total output!! You have to pay attention to where in the RPM band that the alternator puts out and adjust the ratio of Crank to alternator RPM accordingly.
I changes the "gearing" and the alternator to put out 23A @800 RPM and 55A @1200 RPM and a peak output of 87A @ 4500 (engine RPM)
A good alternator shop will give you a "dyno" sheet on the alternator perfromance@RPM
I can hold 13.2 V @800RPM with the SPAL fans, lights, electric fuel pump, ECU.. on
I have a Lumpy cam...
I changes the "gearing" and the alternator to put out 23A @800 RPM and 55A @1200 RPM and a peak output of 87A @ 4500 (engine RPM)
A good alternator shop will give you a "dyno" sheet on the alternator perfromance@RPM
I can hold 13.2 V @800RPM with the SPAL fans, lights, electric fuel pump, ECU.. on
I have a Lumpy cam...
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
You could also try adding one or two 1 farad capacitors to the electrical system to help even out the load. They are normally used with high wattage stereo systems to keep the headlights from flickering in time with the bass drum.
Rick B.
Rick B.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Originally Posted by ChevyL82
Would a bigger pulley on Alt help? If so what size?
What do you have your idle set at? Might bump it up 100 rpm's or so to see if it helps.
