VenomX-87

Ok this is a real stupid question but when people say advance the timing to 12* or 10* what do they mean and how do you tell if it is this far advanced?

Viprklr

iTrader: (5)

There's a lot of useful information on the homepage/tech articles.
https://www.thirdgen.org/settingtiming

When you're too advanced your knock sensor will start picking up knock/ping and retard your timing. So much for advancing it.

VenomX-87

Thanks didn't see that, There is no computer left so there is no chance of that picking up the problem. :P

xgtharo86x

iTrader: (1)

is retarding or advancing your timing better??

VenomX-87

I know if advanced it will run a lill better but it will make it run hotter.

ResurrectingZ

Depends, which do you like better? Low end torque or high end torque?

VenomX-87

Its got to be low end power

dimented24x7

iTrader: (2)

One thing about timing is that its all about having the right ammount. If you have too little, itll bog down, dump lots of heat into the exhaust, and drink gas. Too much causes the cylinder pressure to rise too quickly, which will reduce power because of pressure-volume work to compress a hot, nearly burned mixture, cause overheating, running rough, detonation, etc.

There are some good ballpark values, but the only way to find out whats best is through experimenting.

VenomX-87

OK i got 1 more question, There are 2 marks on my harmonic balancer (left and right) what one am i meant to use when lining it up with the timing cover?

There is a third one to the far left that someone added i duno why

VenomX-87

OMG!!!
forget my last post, i just did it the right way and i was WAY off.

I took no:1 spark plug out and VERY slowly turned the engine over till it hit TDS and re checked the harmonic balancer mark.......... umm the grove in the harmonic balancer (where i have had it set ALL this time) was 26* Advanced!!!!!! I now know why i kept overheating under load but don't know how my car was running at all.

I took it for a test run around the block at about 6* advanced, Hard off the lights it took off so damn fast compared to how it normaly dose, it evan broke the tyres loose going from 2nd to 3rd (this is with a Holley 600 vac sec but with the vacume secondarys locked off).

xgtharo86x

iTrader: (1)

low and torque is like from a light and high end torque is from a role?? so retard is for low end and advanced is for high end? if i retard my timing will i save gas?

jonmark1985

see it don't work that way for me, i get better gas mileage with 93 premium fuel and setting my timing ahead a bit and it seems to run a whole lot stronger, but thats with factory heads that may not burn fast

VenomX-87

Ok now i have a nother problem, When the car is warm and i shut it off it runs on for like 2-3 seconds like it wants to keep going but it has no ignition.
Dose that mean it is too far advanced still or is it too retarded now?

xgtharo86x

iTrader: (1)

what is it set at?

VenomX-87

about 6* counter clockwise on the harmonic balancer.

ResurrectingZ

Its called "dieseling" and can occur when there are hotspots or carbon buildup in the combustion chamber. Do yourself a favor and get some seafoam and run that down the carb.

VenomX-87

umm, i live in australia and i have never seen that brand over here.
What dose it do?

dimented24x7

iTrader: (2)

Dieseling can also be caused by too much timing as well. To clean the combustion chambers, you can also use water. You carefully pour enough in that the engine complains a bit, but not so much that you hydrolock it and bend a rod or something. If you have a cat, disconnect it. Youll get alot of carbon and slag chunks with an old motor from my experience.

Again, with the timing, its all about having the right ammount. Just retarding it or advancing it wont help much. If the balancer has been messed with, Id get a new one. God only knows whats wrong with the present one if it has lots of marks all over the balancer ring.

VenomX-87

hmm i dont wana blow my engine up