Go get some, 82GT!

[rwhite65]

I would say definitely set the floats, that could be hurting you some. Have you checked your plugs lately to see how this new carb is running?
Ryan

[Dark Knight]

Heat and humidity are power killers.. I lose 4-5 mph between summer and winter. Next time you run, either find someone with a portable weather station, or see if they have one in the tower and see what the air density is. Your fuel pump shouldnt have any problem keeping up.

[82 GT]

I checked my float levels and they already had a slight trickle coming from them, which lead me to believe they're good to go.
What' the best way to compensate for heat and humidity? Go lower on jets?
Jester, where are you at?

[Dark_5.0]

Dont get too excited about your numbers equaling low 12's.

I pull a 1.60 60ft and go 108mph and run mid 12's.

I had my #4 injector unplugged once and didnt know it and I still ran a 13.50 @99mph @3000ft. This was my first time out with the car I sure was glad when I figured it out and ran a 12.60 @108mph the next time out.

I bet its a timing issue cause if you are going lean enough to lose 6mph than your plugs should tell the story. The electrodes should be bright white if that is the case.

[82 GT]

My buddy's mustang, last year pulled the same 60' as I did this year and was good enough for high 11's. If my setup can't run 12's with a 351 then there's something waaaaay wrong.

[Dark_5.0]

Originally Posted by 82 GT

My buddy's mustang, last year pulled the same 60' as I did this year and was good enough for high 11's. If my setup can't run 12's with a 351 then there's something waaaaay wrong.

I was pulling 1.7 60fts when my my car was nearly stock and in the 14's. Slicks make good 60 ft's and HP takes over from there you are lacking in the HP department for whatever reason.

Where I live it is 100 degrees everyday and the most my mph ever varies is 1.5mph from winter to summer.

I am just trying to help probably noone here is at the track more than me. Nearly every weekend I am at the track. literaly over 300 1/4 mile passes.

Obviously there is something waaaaay wrong when you lose 50hp. You need to find your 50HP and then some to get where you want to be.

I hope its something simple.

[~The Jester~]

Sounds like fuel to me too bro. Did ya yank the plugs at all and see if it was lean/fat? I'm guessing fat. Remember, fat is safe, but lean is fast.

Still running a duraspark ditzy? Get a good light and see when/how much timing it's throwing in. Sometimes (mine included) those things are goofy with the advance. Unlpug and block off the vaccuum advance at the track, set the base timing, and LEAVE the vacuum advance disconnected. Check the plugs, adjust the jets accordingly. No power valves, right? Didn't we already get rid of those?

Did the car feel like it nosed over? You were already losing ponies at half track. Launching that hard, ya definitely need jet extensions in the rear, and center hung floats.

Don't get freaked out bro, it's just a weather and tuning issue. I made you a promise, and I intend on keeping it!!!