Go get some, 82GT!

[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!!!

[82 GT]

Bill, my dizzy is a Mallory unilit model.(no vacuum advance). My front plugs seem to be normal and the rear plugs are white. Does that suggest lean secondary jetting?
My jets, right now, are 69/76, which a lot of people on fordmuscle, say is on the lean side for this engine. Check out the replies over on FM and see what you make of their suggestions. Some say I'm lean, other say I'm rich.
I wanna say I'm lean because it runs hard to the 1/8 mile and then noses over. I think if I was too rich, I would have a bog and she would take off when she actually needed the extra fuel. See my line of thinking there?
Here's the link on FM: http://www.fordmuscle.com/forums/all...sed_51507.html

[82 GT]

OK, here is something interesting I found just now. I did a fuel flow test and it took the pump 33-34 seconds to fill 1 gallon container. THEN, I did the same test with my electric fan running and it took 40 seconds to fill it.
It seems when the fan is running, the pump loses power because of the fan.
Also, the pump gets much quieter when the fan is ON.

[~The Jester~]

Originally Posted by 82 GT

OK, here is something interesting I found just now. I did a fuel flow test and it took the pump 33-34 seconds to fill 1 gallon container. THEN, I did the same test with my electric fan running and it took 40 seconds to fill it.
It seems when the fan is running, the pump loses power because of the fan.
Also, the pump gets much quieter when the fan is ON.

Well, There's your problem! 30 seconds to flow 1 gallon of fuel??? We're talking less than a quarter of that, ya know, ELEVEN! I can fill up a 5 gallon fuel can in that amount of time. Sure, I don't actually BURN that much, but if the motor wants it, IT'S THERE. With me bro? We figured out that my car would literally burn 1 gallon of fuel per pass. I was running 11.0's at the time. It takes you 30 seconds to flow 1 gallon?

BRAKE SPECIFIC FUEL CONSUMPTION. Learn it, live it, know it, love it!

And then to drop down to 40 seconds with the fan running, that just sux bro. How exactly do you have this Holley Blue wired? Relay???? Yes, you have a relay, RIGHT????

[82 GT]

Yep, I have a relay wired BUT I took a short cut and powered my pump relay with the hot wire going to the fan relay instead of running a seperate hot wire from the battery.
I don't know if that makes a difference or not but that's how it's wired now.
Also remember that the fan and pump were only running off of 12v. since the car wasn't running and seeing the full 14.5v.
I also know that while driving, the pump gets quiet the second the fan is turned on. Could the fan be robbing current from the pump because they share the same hot wire?

[rwhite65]

I am no wiring whiz, actually I have caught almost every car I own on fire. With that said, I will give my 2 cents. I ran a certain gauge wire to my electric fan, to make sure it could handle the draw and not get to hot and possibly burn up on me. Now if I read your post right, you wired the fuel pump using the fan’s hot wire? I would think it needs it own lead dedicated to just the pump.

I think you have probably just found your lost MPH.

No short cuts.. run it again....and come back and tell us how she did!
Ryan

[Dark_5.0]

Sounds like that should be your problem.

If you can get your mph back you should be somewhere in the 12's.