CARBURETION and your Large/Small port 16V 4AG

[dr.occa]

IGNITION OPTIONS FOR CARBED 4AGE ENTHUSIASTS

I saw that there is still quite a bit of a hurdle in getting proper spark & timing in carbed 4AGE's so I thought I'd add some info directly related to this area of interest.

1. Use the stock blue top 4AGE distributor locked out at the timing of your choosing.
2. Use the stock blue top 4AGE distributor w/ the MSD 6A/L w/ MSD p/n 8980/8981 timing curve "computer" - to use the stock tach you will need to use MSD's p/n 8920 tach/fuel adapter NOT the 8910EIS (fuel injected w/ 6AL) or 8910. the 8920 is for the magnetic pick-up leads that are used from the Blue Top Distributor. If using an aftermarket Tach then the 8920 is not necessary.

note* - the 8980 is a fixed timing curve. this means you would set your distributor timing at your intended idle timing. the 8980 will advance your timing and max out at 20 degrees full advance e.g. if your idle is set at 10 degrees just under 1k your full advance will be 30 at 3k.

note** - the 8981 is a "programmable" timing curve unit. it's still based on the same design of the 8980 BUT you get to dictate when timing advance starts and ends in your rpm range.

3. Use the 4K distributor from a starlet. It will need to be adapted to mount up to the 4AGE head. You will also need the gear from a 4AGE distributor to replace the 4K's in order for it to spin off of the 4AGE exhaust cam.
4. IDS w/ megasquirt and crank tooth wheel and sensor. electromotive and other companies can provide you with good IDS setups.

other suggestions are welcome. i added this post in order to facilitate searches for other members who are interested.

originally posted on Club4ag.com