Hi all,
Over the years I have noticed a few ocassions of slight "tinkling" under very heavy load in first gear on very hot days - it's rare but annoying, I am sure it's when the secondaries come in - Holley 4150 750 double pumper, manual secondaries. SB big cam, polished/ported, dyno'd at 415hp.
Noticed it again today (82F) after a few hard accelerations, adding a couple of gallons of super-unleaded (still E5) helped a little. I guess it's pinging/pinking - running lean, so I need more octane or richness, perhaps timing, can I fit larger jets in the secondaries to cure it? and any "how to's" out there, I've never taken my carb apart as it runs so sweetly normally.
I will run exclusively on super unleaded (97/98 octane) from now on but would an octane booster help?
Cheers
Pinging
- 502wingman
- Posts: 413
- Joined: Thu Nov 22, 2007 9:59 am
- Location: Backnang, Germany
Re: Pinging
in my humble opinion there are three choices depending on your preferences:
- adjust your timing
- try octane booster and calculate if it is cheaper or simply use
- high octane fuel
- adjust your timing
- try octane booster and calculate if it is cheaper or simply use
- high octane fuel
Peter the WingMan
Backnang, Germany
Backnang, Germany
Re: Pinging
Thanks Peter,
I'll try all three. Couldn't make PC this year, for many reasons but will be there along with Martin and the others in '22.
I'll try all three. Couldn't make PC this year, for many reasons but will be there along with Martin and the others in '22.
- 502wingman
- Posts: 413
- Joined: Thu Nov 22, 2007 9:59 am
- Location: Backnang, Germany
Re: Pinging
Same here bro. We only went Saturday night for the ceremony in memory of Wolfgang. It was so sad and I am still devastated.
Peter the WingMan
Backnang, Germany
Backnang, Germany
Re: Pinging
Hi Peter,
I've done all three and pinging gone, I think mainly due to retarding the timing a few degrees but not too far to reduce power, still pulls like a train.
See you in PC next year and we'll have a toast to Wolfgang
I've done all three and pinging gone, I think mainly due to retarding the timing a few degrees but not too far to reduce power, still pulls like a train.
See you in PC next year and we'll have a toast to Wolfgang