Originally posted by 327,JET
If your motor is idling rough and your carb is a Holley there is a procedure that might help . Try drilling small holes in the throttle plates to try to get more air flow through the carb it could help.Holley manuals show this step by step. It could help ? Or maybe advance your timing a couple of degrees . Who knows?That Camaro sound's pretty awesome!
I have tried with drilling holes in the throttle plates but my spark plugs were foulin out constantly and that didn't work.Then about 8 years ago I took the 650 double pumper to a local speed shop.He said the 650 Holley was way to small for my 402. big blockThe guy told me he could have some company in Texas rebuild it(TCI OR TRC) and make it flow around 785cfm's with a 4 corner idle circuit for better idling.It finally after all the sets of spark plugs cured the fouling of my hunderd's of spark plugs.The thing i don't like about this Carb is when it starts to idle aroud 800-1000 rpm's after about 10 minutes it idles at 1500RPM's.I have the timing at idle(1000rpm) around 16 degree's,anything less then 14 degree's and it runs sluggish.I still have alot of money to spend on my camaro before its awesome.It is a four speed and not the stock engine but it has decent bottom end power,probably because I have the oval port Heads and the torker 2 in place of the Holley strip dominator which is a race manifold.Don't know why I ever bought that manifold.I just think a better Carb is all I need.Alot of guys that have alot of carbs around can change it on there motor while the only carb I have is on the manifold.