Quote:

---

What size line. Remember that up to the 1/8 the engine is running freer and not pulling as hard as farther down track so will us less fuel and the pressure & supply will keep up easier that down track where the engine is working harder and using more fuel.

---

Quote:

---

Next time your at the track, raise the float level about 1/2-3/4 turns out on the bowls, and increase fuel pressure to 8-8 1/2 lbs..see if the car responds with any increase in MPH....If it does, there might be a fuel starvation problem.

---

Thanks Bob, I'll give that a shot.

Quote:

---

Sorry, long day..... It's a 3/8" fuel line from the tank to the carb. Mallory pump, Fram canister filter(new element), stock tank, 3/8" pick up, Holley reg., Holley 750, shift at 6,500. Anything else you need to know?

---

Quote:

---

Fuel consumption is much greater in the last half of the 1/4 mile than the first 1/8 mile do to rpm acceleration per second, the first 1/8 you go through two or three gears, the last 1/8 is usually done in high gear only. The Fram canister can be a limiting factor on the supply side, check it to see if it is plug up full of trash or debris A friend of mine ended up substanially increasing his fuel volume by adding another Fram in parelel from the tank to the pump by adding a Y to the inlet side of the pump from the two filters If you can swing it use a better in line 40 micron or larger in line race fuel filter instead of one Fram or two Frams

---

Quote:

---

Quote:

---

Fuel consumption is much greater in the last half of the 1/4 mile than the first 1/8 mile do to rpm acceleration per second, the first 1/8 you go through two or three gears, the last 1/8 is usually done in high gear only. The Fram canister can be a limiting factor on the supply side, check it to see if it is plug up full of trash or debris A friend of mine ended up substanially increasing his fuel volume by adding another Fram in parelel from the tank to the pump by adding a Y to the inlet side of the pump from the two filters If you can swing it use a better in line 40 micron or larger in line race fuel filter instead of one Fram or two Frams

---

That be me and I picked up way more flow w/the two filters but I`d toss those and get something better and less restrictive. Yesturday I changed out my cannister filter and installed an Earls in line screen filter and my gauge read 1/2 lb. more pressure when I fired it up.

---

Quote:

---

I think its time to pull the fuel system to check out
what you have and to correct where its not up to par

---

Quote:

---

Replace the Fram filter with a Wix.

But really... why is 3 psi a problem? It is when it gets to 0 psi that your motor is consuming fuel faster than your pump can feed it. As long as it is above 0 you have fuel in your bowls. Is the engine missing at the top end?

---

Obviously, you wood like to see the pressure be the same throughout your 1/4 mile trip, but as long as the float bowls remain full, it won't make any difference if you have 4 lbs less in the lights. It does show that your existing system is "boarder line" though.