Z20 timing

Rex Calibvr · Post by **Rex Calibvr** » Wed Nov 04, 2015 7:22 am

Hi.
I have just rebuilt a 1987 z20 & would like to know what the exact timing should be.
In Google i find everything from 5deg to 12deg

Does anyone have a Haynes manual for correct info.

johnny262 · Post by **johnny262** » Wed Nov 04, 2015 11:41 am

Us Federal and non-us cab/chassis models 12º BTDC @600rpm
Non-us (except cab/chassis models) 5º BTDC @650rpm

The thing I dont get is that arent they all cab/chassis models....?

Rex Calibvr · Post by **Rex Calibvr** » Wed Nov 04, 2015 1:22 pm

Out of a 1987 nissan navara. 4 spark plug.
I'm picking it's non us model as they didn't have navara. I'm sure the 720 pickup is different but i could be wrong.

Rex Calibvr · Post by **Rex Calibvr** » Thu Nov 05, 2015 5:29 am

Is 12deg with advance still connected?

johnny262 · Post by **johnny262** » Thu Nov 05, 2015 11:21 am

Na mate disconnect it and plug the hose

Rex Calibvr · Post by **Rex Calibvr** » Thu Nov 05, 2015 4:14 pm

OK thanks. Looks like I'll just have to test it between 5- 12 deg.
I've disconnected the egr, & will run 95' so i presume it'll run best around the 8.

Any actual answer appreciated, as I'm confused over the us chassie one.
But still helpful thanks

Rex Calibvr · Post by **Rex Calibvr** » Thu Nov 05, 2015 4:16 pm

And by the way, at 5deg it didn't seem to run as well. So I'll work my way to 12. & see what sounds and feels optimal

Rex Calibvr · Post by **Rex Calibvr** » Fri Nov 06, 2015 5:57 pm

Runs best at 12deg, everywhere else was rather flat on power.
I have also found another z20s that i can access to see what that is running.
I'll post any results once i have worked it all out.

Z20 timing

Z20 timing

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Re: Z20 timing