hi there guy's

ill like to get some input on this from you all.i have a 85 RX that i have been working on and off.

it's a 13B full bridge engine with 3MM apex.1 msd box on the leading,and a holley carb 650, jet are 66,

i went to the track and ran on my first pass 11.11 on my secon pass10.90 and i miss 3 gear.on my last run was a 10.80,

and i miss 3 gear again,my ? is what can i do to run better time.as for the rear end it's stock. no slick.no nos.this is a the 1/8 mile track.

 

Get better tires...

 

ok thank's the gear in the rear end is a 3.90 i have a set of 4.77 gear just sitting around.what if i put the 4.77 gear on and put some slick on there to

 

definitely go with the 4.77 and step up to a better tire. At least Mickey thompson street racing compound tires. Which model engine is it, what timing, what year transmission, what clutch setup. As you can tell there are a thousand questions. The most important being... At what RPM are you leaving the line?

 

Im turning 10.117 at the 1/8mile with a 12a. Tires are going to help a bunch. Im running a pair of old Grand am's on the back. What you could try is go to jegs or summit and order there air/fuel gauge and sensor set up. It was key for me to get the stock carb and intake running properly. It saved me a ton of pulls on the dyno.