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Z20 timing
Posted: Wed Nov 04, 2015 7:22 am
by Rex Calibvr
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.
Re: Z20 timing
Posted: Wed Nov 04, 2015 11:41 am
by johnny262
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....?
Re: Z20 timing
Posted: Wed Nov 04, 2015 1:22 pm
by Rex Calibvr
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.
Re: Z20 timing
Posted: Thu Nov 05, 2015 5:29 am
by Rex Calibvr
Is 12deg with advance still connected?
Re: Z20 timing
Posted: Thu Nov 05, 2015 11:21 am
by johnny262
Na mate disconnect it and plug the hose
Re: Z20 timing
Posted: Thu Nov 05, 2015 4:14 pm
by Rex Calibvr
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
Re: Z20 timing
Posted: Thu Nov 05, 2015 4:16 pm
by Rex Calibvr
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
Re: Z20 timing
Posted: Fri Nov 06, 2015 5:57 pm
by Rex Calibvr
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.