Hey guys. Just found this site not to long ago and thought I would say hi. I use to be over at stangnet.com several years ago, when I was on the forums all the time. However, I don't like their format.

Anyway. I haven't done anything with my mustang for years. Spends 99.9% of the time in the garage. I maybe put 300 miles on it a year. Anyway. I finally took it out to the drags last Friday night and here are my results. All are street tires.

Run 1. 13.121 et at a 111.64 mph, small burn out 35 psi
Run 2. 13.102 et at 110.99 mph., no burnout, 15 psi
Run 3. 12.988 et at 112.43 mph, decent burnout, 20psi up'd fuel pressure to 7psi
Run 4. 12.739 et at 116.01 mph, decent burnout, 20psi, advanced base timing from 8 to 12.
Run 5 12.700 et at 115.72, decent burn out, 20 psi advanced timing to 14.

Sounds great and I met my goal of 12.7 for the night, and it kinda got me back into playing with my car. However, the power flattens out at 6500 in 3rd gear and 6000 in fourth gear. It should run out to 7200. So I am thinking it has a combination of a few problems. I think the stock 5/16 fuel line is too small. Anybody know if there are direct replacement 3/8 fuel line kits. I am looking for one from the tank up to the fuel pump. I think it is simply running the bowls dry.

Also i think my main jets a a little on the lean side. I did pull a plug check on my run 3 and the plugs were more white than brown.

All in all though. I am extremely happy with a 12.7, but I think it will probably dip into the 12.5 12.4 with the sorting out of the fuel issue. Also, I think I may try messing with the timing a little more as well. My best run was the last one of the night, and that was with the timing bumped to 14. However, it had a major miss at 6700 in 3rd gear and 4th gear. Bad enough that people heard it and noticed the car nose down. My theory is that it was running that much harder at 14 base timing, that the carb truly ran out of fuel.

any opinions, suggestions etc.

 

welcome

 

Yes. You can also consider sourcing and using the 68 pre-bent setup, it will move your line from inside the tunnel to a cooler spot along the side. If you installed front torque boxes it will go through it on the driveside in a pre-fab hole.

I needed to upgrade my 5/16 to 3/8 with my 410c and it is still marginal. I make power to 7500, but I always shift it early in 2nd and 3rd at 6500 because that is where I have my best times. When I would wind it out to 7300 in first when I would get to 6800 in 2nd it would just stop and I would need to basically lift a little and then remash so I knew I was running it dry.

Switch to a softer compound drag radial. You don't do burn outs with street tires.
With the MPH you listed you should be seeing high 11s.

 

The 68's had 3/8 fuel line? That would be neat to be able to get one out of a 68 and do minor modifications to it. I lean more towards factory parts than aftermarket stuff.

As far as drag tires go. I think I am just going to stick to street tires for now. I am not sure how much I will be running at the drags, and I would like to see what i can get it to do with street tires. I had always thought no burnouts where the best for street tires, but I did the best 60 ft times when i did a small burnout. Nothing smokey or anything, jut kinda to clean the dust off. Then of course, with drag tires, comes more broken parts.

 

Beats me....but I know you can buy them in 3/8 and pick up the benefit of moving it out of the tunnel and away from the hot exhaust. You will also need to get a new sender in the tank.....quantas sells one with a 3/8 pickup. Then a new fuel filter and make sure you pump has 3/8 or larger lines so you don't have a bottleneck

 

blue, you don't mention what you're running.... I'm guessing...302 inj'd 4 spd? what's your rear gear? Would help me to better follow the discussion.

 

Ah, ill have to start doing some more digging and see what I can find. I haven't been into this stuff in such a long time, i have forgotten so much of the stuff that is even available. Shoot, i had to scratch my head for a few seconds to even remember what was #1 Cylinder when i was messing with the timing.

I should be good with everything from the fuel pump on up to the carb. Its a Edelbrock race pump with large ports, large braided lines up to the carb, and large filter in there as well. I cant remember for the life of me what size i have, but I know I would have put at least 3/8 in.

Its a 332 with AFR 205 heads, Comp solid roller cam, Eagle rotating assembly, 12.5 compression (runs on pump gas cause the cam is so large), Victor Jr intake, 750 Mighty Demon Carb, Hooker Super Comp headers, Comp 1.6 roller rockers, Centerforce clutch, T5 Z tranny, 9" 4.30 31 sp rear, Detroit locker, Moser axles.

 

oops I actually have AFR 185 heads. After I posted I thought I had better make sure. So I ran out and saw the part number is for the 185 heads.

 

Do you have adjustable shocks in the rear and some kinda traction bars ?

 

I'm getting a 331 with 11.7:1 compression. How do I figure out what cam to use to lower the comp ratio to be able to run pump gas?!