Just installed a coolant reservoir tank to my champion 3 row radiator. It´s working better now. Anyway, the car is still presenting some sluggish acceleration after getting  stuck on a 5 to 10 mins short traffic. Can someone explain to me why if i pull out all the NGK BP6ES spark plugs and brush the carbón off, the car accelerates fine? I have both of my carbs set to 3 turns clockwise. If i lower it more, i start loosing power at 1st gear.

 Carbon on the plugs acts like an insulator. What does it feel like when it's at 2 1/2 turns?

ill be cleaning them today and lowering the mixture to 2.5. Ill let you know.  Thanks Mark!

should i take all the spark plugs out and clean them once again?

 Yeah, clean them again. You've already discovered how it will run with fouled plugs. New plugs would be better.

On 2/10/2017 at 8:40 PM, Mark Maras said:

 Yeah, clean them again. You've already discovered how it will run with fouled plugs. New plugs would be better.

Left to right in the following order 6-5-4-3-2-1. I pulled them out yesterday after the long idle on saturday evening traffic. I even noticed that the spark plug gap was reduced from .031 to .028. Is this normal? Too much heat is causing this???

Get some new plugs, gap them, while you have the old ones out do a compression check, write down the results for each cylinder, put the new ones in drive it for a week, take pictures of plugs and post.

 

FI or Carbs?

Edited October 5, 20177 yr by Dave WM

Those plugs don't really look that bad.  All six electrodes are fairly clean and look like they've been working.  #4 looks worst but still looks like it was firing.

2 hours ago, Dave WM said:

Get some new plugs, gap them, while you have the old ones out do a compression check, write down the results for each cylinder, put the new ones in drive it for a week, take pictures of plugs and post.

 

FI or Carbs?

Gap how much?? Using petronix ignitor and flamethrower coil. 2 Su carbutetors

what ever the FSM recommends. I don't know if using aftermarket products changes things but if they do, then I assume it would be covered in the documentation that would come with the after market products.

4 hours ago, Dave WM said:

Get some new plugs, gap them, while you have the old ones out do a compression check, write down the results for each cylinder, put the new ones in drive it for a week, take pictures of plugs and post.

 

 

 Good advice. I'm surprised at the color variation in the plugs. Especially #5 and #4 since #6, #5, & #4 all run off the rear carb. @jalexquijano Is there always that much difference in #5 & #4 plugs?

Just drove the car yesterday with new plugs at 2.5 turns clockwise both carbs. It lacks some power at 1st gear though. I think it needs some more fuel at the carbs.