[454impala69]

First of all, kudos to Roy for setting up the Bulletin Board. Way to go Roy! Now my question, does anyone use lead additive in their fuel to control engine ping under load. If so, what do you recommend and where can I buy it. Currently running 91 Octane. Engine is a 454 with the Edlebrock Performer setup (carb, intake, cam). compression is 9.5 to 1. Engine has only 2000 miles on it and has had a pinging problem under moderate load, (less than 1/2 throttle), especially when hot. Thanks in advance.

Scott

[ December 14, 2001: Message edited by: 454impala69 ]</p>

[Tom]

I was running a 79 corveete a few years ago with a bit over 10 to 1 cr and a cam with 292 degrees duration and it wouldn't run at all on pump gas so I added a few gallons of race gas, then it ran like a bear, most octane boosters add only marginal boost, when they say 4points this only means 4/10s so 92 octane becomes 92.4 wereas a few gallons of race gas will actually raise octane to a higher level and the lead will lube the valve seats but you can't run lead if you run cats, it will plug them up

[Roy Newton- exprotech]

Scott there is a couple of ways you can help this. You can change the rate of timing and when it comes in. The other thing is the carb might be lean at that point of the engine RPM. How are you controling the timing and what kind of carb do you have. ROY