Originally Posted by 383z
im sorry it has taken this long to reply i posted this right before i went into work yesterday and have not been on since then.
my brother and i do not know much about the motor besides it has 70cc aluminum heads, flat top pistons, 383 bottom end, holly 750 ultra hp double pumper carb, victor jr. intake, the cam size/piston size and compression ratio is unknown. it has a th350 trans and around 4.10 gears.
its hard to describe the problem besides the pinging noise coming out the passenger side is getting worse and the timing doesn't effect it
i have put 93 octane in it every time but i think the person who we got the motor from used something higher because he used it for the strip only, where im trying to make it a street/ strip car. The person we got it from said it would run on 93 so i trusted his word.
on the highway cruising at about 55 the temp slowly grew hot to about 210-220ish and then staid there. it has seemed to be a little sluggish all around at acceleration. when it starts up after idleing for 3-5 mins it seems like it still wants to die once put in gear but down a street or two that goes away.
thank you all again for any advice given
Ayuh,.... We see detonation alot in boat motors, usually brought on by bad fuel, or water in the fuel,...
Because yer only seein' it in 1 side of the motor,...
I'm gonna guess 1/2 of yer carb is plugged up/ restricted,...
I donno yer intake, but if it's a dual plane, 1 side of the carb feeds one side of the motor,...