Zz6 tpi timeing problem
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Junior Member
Joined: Apr 2018
Posts: 33
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From: Nsw australia
Car: 1992 z28
Engine: 305 tpi
Transmission: Auto
Zz6 tpi timeing problem
Hey guys.
im trying to get this thing running and im haveing a small problem setting the timeing. I have disconected the est connector at the firewall as well. It will start and run but when i use a timeing gun to set the timeing it looks like its showing 160 even though it sounds like its running ok. Any help would be awsome.
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From: IL
Car: 86 Iroc-Z
Engine: 383 HSR
Transmission: 700R4
Axle/Gears: 3.42
Re: Zz6 tpi timeing problem
Am I the only one who kinda flipped out on this picture wondering how the picture came out backwards? only to realize that he is from Australia and it is a left hand drive car? I never actually seen the engine bay in reverse like that, lol.
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From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Re: Zz6 tpi timeing problem
You mean RH drive.
OP. Do you mean 160 degrees or 16 degrees??? if you meant 16 degrees then you need to set your timing gun to 16 degrees and check again. With your timing gun set to base timing of 16 degrees you should see "0" on your balancer.
OP. Do you mean 160 degrees or 16 degrees??? if you meant 16 degrees then you need to set your timing gun to 16 degrees and check again. With your timing gun set to base timing of 16 degrees you should see "0" on your balancer.
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Joined: Dec 2002
Posts: 1,592
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From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Re: Zz6 tpi timeing problem
I can not tell what # spark plug you are connected to but you are on the correct side of the engine (I see your red timing light pick clamp) #1 spark plug is closest to the alternator.
If you are on #1 spark plug and still see 160 degrees, maybe they reversed the #1 position on the Australian made V8s.
Even the toilets spin opposite direction down under LOL. Try connecting to the USA #2 spark plug position #2 plug is closest to the air conditioning compressor.
An OEM balancer would just have have a reference line for "0" but it sounds like you have a fully degreed balancer.
If you are in fact your are on #1 plug and firing order/ engine rotation is same as USA. the only other things I can think is your balancer outer shell has slid from the inner shell so you have inaccurate timing marks or the balancer marks were manufactured wrong.
You can try to set #1 to TDC and make your own reference line on the balancer which would be your "0", but it's funny that your timing is off by 160 degrees since 20 degrees of base timing would not be unusual and 30-36 of total timing is pretty normal.
Operator error or defective balancer.
If you are on #1 spark plug and still see 160 degrees, maybe they reversed the #1 position on the Australian made V8s.
Even the toilets spin opposite direction down under LOL. Try connecting to the USA #2 spark plug position #2 plug is closest to the air conditioning compressor.
An OEM balancer would just have have a reference line for "0" but it sounds like you have a fully degreed balancer.
If you are in fact your are on #1 plug and firing order/ engine rotation is same as USA. the only other things I can think is your balancer outer shell has slid from the inner shell so you have inaccurate timing marks or the balancer marks were manufactured wrong.
You can try to set #1 to TDC and make your own reference line on the balancer which would be your "0", but it's funny that your timing is off by 160 degrees since 20 degrees of base timing would not be unusual and 30-36 of total timing is pretty normal.
Operator error or defective balancer.
Last edited by FRMULA88; Feb 15, 2020 at 05:03 PM.
Re: Zz6 tpi timeing problem
The firing order and cylinder numbering on a Chevrolet engine won't change just because it's on the opposite side of world... LOL!
We need to know if it's truly 160 degrees, or 16* he meant. Number 1 plug is still on the left front of the engine.
ZZ6, does that have fast burn heads?
What camshaft?
This engine may only want 10-14 degrees of initial, and 32 total degrees. Will most likely need a chip burned and custom tuned.
We need to know if it's truly 160 degrees, or 16* he meant. Number 1 plug is still on the left front of the engine.
ZZ6, does that have fast burn heads?
What camshaft?
This engine may only want 10-14 degrees of initial, and 32 total degrees. Will most likely need a chip burned and custom tuned.
Thread Starter
Junior Member
Joined: Apr 2018
Posts: 33
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From: Nsw australia
Car: 1992 z28
Engine: 305 tpi
Transmission: Auto
Re: Zz6 tpi timeing problem
I checked TDC before i put the distributer in and the mark on the balancer was spot on. The gun is showing me 160 at 750rpm. Strange because its ideling fine. Its a zz6 crate engine so its made in the usa. Not sure if it would be possible to stuff up the fireing order on the dizzy and it still start and idle ok. Between this and my rhd header issue im haveing a bugger of a time getting this car over the finish line
Joined: Apr 2000
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From: South Windsor, CT
Car: '89 GTA
Engine: ZZ6TPI
Transmission: T56
Axle/Gears: Borg Warner 3.70:1
Re: Zz6 tpi timeing problem
I checked TDC before i put the distributer in and the mark on the balancer was spot on. The gun is showing me 160 at 750rpm. Strange because its ideling fine. Its a zz6 crate engine so its made in the usa. Not sure if it would be possible to stuff up the fireing order on the dizzy and it still start and idle ok. Between this and my rhd header issue im haveing a bugger of a time getting this car over the finish line 

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Re: Zz6 tpi timeing problem
Can you post a picture of your timing light, specifically the dial area if its a dial equipped timing light?
Maybe it's a case of misunderstanding of the terms we're using to communicate.
Maybe it's a case of misunderstanding of the terms we're using to communicate.
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Re: Zz6 tpi timeing problem
If the engine is happy, it doesn't matter whether you're happy with the "number", or not.
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