what timing, plug gap?

[zed]

Goodday

I was wondering what timing you guys are running, and what spark plug gaps? My owners manual gives 8 ~2 degrees BTDC - but I read in the DATSUN OHC book (Honsowetz) they use 20 to 30 degrees...

Also what plugs / gaps? I have NGK BP5EY - gaps around 1.1mm / .043

I have a mechanical distributor with Pertronix points

[bonvo]

standard for an l20b is 12 degrees advanced and gap at .35 im running mine at 14 degrees and .44 with everything else stock

[datzenmike]

Goodday

I was wondering what timing you guys are running, and what spark plug gaps? My owners manual gives 8 ~2 degrees BTDC - but I read in the DATSUN OHC book (Honsowetz) they use 20 to 30 degrees...

Also what plugs / gaps? I have NGK BP5EY - gaps around 1.1mm / .043

I have a mechanical distributor with Pertronix points

 

Thats probably total mechanical advance at 2-3,000 RPMs.. Initial advance is around 12 at idle. And this is average. Altitude, carb setting, compression, brand of plug and gas even in the same octane range can all affect where your engine runs best. Adjust up and try driving, keep going up a degree at a time until here is pinging under load and back in down till it stops. Could be 13 or 14 or even 11 degrees!

[racerx]

Advance it as much as you can till it starts pinging at load, meaning take it for a test drive on freeway and see if it pings. You can gain as much as like 7 HP by advancing your timing.

[fiveNdime]

When my car was a drag car I used a choke cable and always had the dizzy loose so I could pull for the more power while dragging and keep it pushed in when not. It worked great but then took it off when it was a street motor.