Has anyone played with fuel enrichment to get rid of knock on a 10.5 engine, instead of retarding timing?
The reason I ask is my engine is ALMOST free of knock at 6 degrees btdc idle, but will knock mildly under load from about 3000 rpm on. I did screw the jets out a little towards teh rich side, and it did help, but it is winter here, and the knock will only get worse as it heats up.
I don't want to kill of base timing, as it gives a fair bit of low end torque, so my options are enrich fueling in the knock range, recurve distributor or constantly run an octane booster.
I know it's easy to just say retard base timing, but I bought a 10.5 compression engine for the performance, and by golly, I want the performance!
So, what is the best way to enrich HIF carbs in the uper midrange under load, but keep reasonable economy the rest of the time, or will it not cure the knock, and I should recurve the distributor?
Is it worth also playing with cooler spark plugs, or is a bit of all the options above the way to go?
Regards, Andrew.
The reason I ask is my engine is ALMOST free of knock at 6 degrees btdc idle, but will knock mildly under load from about 3000 rpm on. I did screw the jets out a little towards teh rich side, and it did help, but it is winter here, and the knock will only get worse as it heats up.
I don't want to kill of base timing, as it gives a fair bit of low end torque, so my options are enrich fueling in the knock range, recurve distributor or constantly run an octane booster.
I know it's easy to just say retard base timing, but I bought a 10.5 compression engine for the performance, and by golly, I want the performance!
So, what is the best way to enrich HIF carbs in the uper midrange under load, but keep reasonable economy the rest of the time, or will it not cure the knock, and I should recurve the distributor?
Is it worth also playing with cooler spark plugs, or is a bit of all the options above the way to go?
Regards, Andrew.