Hi All, i'm just about to start looking into pinging. I have got my engine in and running and it is all out of tune im sure.

History.
It was in a 72 super so 1600 DP
Pulled out and put in buggy in 2007 and ran spasmodically for about two weeks but never on the road.
(Replaced pushrod seals at this time)
Been sitting on bench since then.
Last weekend went into my project bug.

Have replaced spark plug leads, points, rotor cap...

I will need to tune carb and timimng

I have currently set timing to about 7.5 BTDC using circuit tester light off neg coil.

I have never had pinging before, it sounds like a ball bearing bouncing around inside the block (horrible).

*What should i set it at? best method without a strobe?
vacuum advance dissy, stock pict 34 carb.

Answers or reading direction would be appreciated. Cheers.

PS ITIS SO GREAT TO FINALLY HAVE HER TICK OVER AGAIN!!!!

Sure its pinging? Does it only do it under load and when the engine is warm?

What octane fuel are you running?

Some cars will ping if you're not running a higher enough octane. I know the first engine in my baja didn't like anything less than 95.


Smiley

Is it a degreed pulley or just a stock one with notches?

Hi

I have Chinese crank and a Scat pulley in my sons bug, not sure which one is incorrect but after doing a positive stop test I found that my timing marks were 6 degrees out.

Are you sure your pulley is marked correctly?

Do you have fresh fuel in the tank?

Steve

Ill have to have another look tonight guys. Thanks for all the feedback. It must not be pinging, because the car is starionary. I hope there is not someting in the heads!!!the exhaust outlet has been covered most of the time. i'll be able to give it a good look at over the weekend. What timing setting can i set it at and should i do that cold or hot? i dont have access to a strobe at the moment. It has been a while since i have done any timing or tunig, but last time i did, the car fired into life about 1/4 of a second after i turned the key, this is not. It is turning over for some time before it finally gets up enough courage to turn over.

I think i just need to have a good fiddle with it this weekend. I know of a few websites with tuining advise so ill start there.

Fuel is New.
It is a cheap degree pulley, so maybe i need to check actual TDC.
Maybe higher octane fuel could have been nice its only standard.
Sorry about the pinging suggestion, need to re think.

Cheers

Hi Aussie,

I'm learning about timing myself. I bought the Bugme Video Series.

Video 1 has a great section on how to set the timing.

With a vacuum advance dizzy you should be setting it at 7 1/2 degrees BTDC as you said you have. I use my multimeter but the guy in the video did static timing using his test light. Hook the positive up to your coil +ve and ground the negative. You should have 1 volt when away from connection.

Turn you motor so your rotor button is before #1 TDC. Set you crank pulley at 7 1/2 degrees and then twist your dizzy until the test light lights up. Roll the pulley back and the advance it and see if your test light lights up when you hit 7 1/2. Keep adjusting until you do.

There is no harm in twisting the dizzy while the motor is at idle to see if the noise is caused by an advanced timing issue etc. Usually pinging occurs with shit fuel or a really really hot motor that is under load.

I have pinging at the moment which is why I'm reading here. I've done everything I'm supposed to but still it pings and is getting too hot. I think my issue is its time for a rebuilds. Compression tester arrives in a week so we will see.

Best of luck. I hope my advice helps some.

Bronze.

Pinking sounds like a rattle,so if as you describe it sounds like a ball bearing smashing into stuff thats where id be looking.

here is my engine pinging. The whole engine is toast!

http://youtu.be/OGCcTw3j0fY 

hmmm. i have the original fuel sticker on my fuel filler door suggesting 91 RON for flat stock original motor.

actually thats very true. fuel quality varies considerably.


When I thought I was doing a good thing by going from e10 which my whole fuel system was clean and worked fine for numver of years.

then when I took everything on the whole fuel system apart to change the worn out fuel pump in the tank and found it to be spotless everywhere.
Also changed the injectors for the sake of it to new ones.

At the point I decided to go to 95 premium from there on.

1.5 years later...... catastrophic failure of the fuel system.

Had to get new tank, corrosion, sludge (red and brown stuff, dirt and hoses fell to bits)
New pump (40k old genuine) check valve no longer worked and the body of it was corroded.
Fuel filter was blocked
fuel injectors f**ked, leaking and poor spray pattern (also 40k old)

just check these pics.

231k donor pump pickup out of a 91 VP berlina



My 40k 1.5year old pick up




231k 91 VP left, Mine 40k right (it used to be white and note the rubber plug is deteriorated and only saw 95 prem)



40k old left, 231k 20 year old right. you can see all these brown splotches on the concrete, they dripped out of the 40k pump.
also the gaskets and hoses fell to bits.



Morel of the story is: today you don't get what you paid for, you get ripped off regardless. And fuel these days is shit and sometimes worse the more you pay for it.

we were talking about octane rating,not additives,they are 2 quite different beasts. The additives and contaminates (quality) used in whatever fuel you used are probably the cause of what you are seeing,nothing to do with octane rating

yes but the octane rating varies according to fuel quality.

you could be buying nice and good fuel where its advertised RON is as it is, where sometime you could be buying poor quality or contaminated fuel and its actual RON is far less than its advertised RON.


You can feel this sometime after filling up, the car just lacks power and response, then you run it out and get the "same" fuel from a different servo and all the sudden the car springs back into life.


I know of a few people that got engine damage from underperforming fuel.

Its fact! fuel ain't fuels. and the variation of quality and octane has gotten many times worse in the last 3-5 years.

We are paying top dollar for 3rd world quality fuel.

use the best fuel you can afford and there is a pinging sound that's when the engine is running bad fuel or timing is out it will
destroy your motor is not sorted

Timing sorted and running much better. Thanks for all your helpful suggestion.

Now I have got the carny out of tune. Shouldn't have touched it.