Okay guys, got big problems and the car is supposed to see track time tomorrow and I'm in points contention.
Car (truck?): 1982 El Camino
Engine: 383 9.8:1 compression, fed by an Edelbrock 1910 (Q-jet for all intents and purposes) and the fire is made by a MSD Pro Billet HEI with total timing at 38° (seems high, but it likes it).
The fuel pump has the ability to push way more fuel than it will need. I have an Aeromotive that can push up to 20 psi (18 on the average ). I have it regulated down to 7 psi in a return type system. The fuel is the factory hardline from the tank to the pump and up to the front where I have used 6 AN line to the the Aeromotive return type regulator, 6 AN to the carb and 6 AN all the way back to the tank.
I have no doubt the pump can keep up with it. It can suck my tank dry in about three minutes (17 gallons later...)
Now the problem, The car seems to go lean and surge above 4500 rpm at WOT. Keep in mind the shift point is 5500 rpm. I have tried several things including using the vacuum/boost port to give me a little more at WOT. I had it set to 12 psi at WOT and came to about 6 psi at idle. Ran it out the same way, started to surge like it had before around 4500 and up. I tried bringing the pressure down the other way and came down to 5 psi, just in the odd chance it worked. To say the least, it didn't help. I even replaced the distributor cap and rotor in case there was a chance the distributor had something to say about it. The parts that came off looked fine, a little worn, but in good condition. I pulled the carb apart to and checked all the float levels and little channels that Q-jets have, and it was as clean as it was when I put it on the first time. I have change the coarse filter before the pump and the fine filter at the carb.
Now, I can run it up to 4500 and nail it to WOT and it won't surge till 5000. It seems to me that I have a problem with getting gas into that tea cup of a fuel bowl. I moved the float level a little higher to see if it make a difference. It had no effect on the performance on the car.
I am out of things to try in an effort to make this run right.
Recap, new filters some improvement, pressure up no improvement, pressure down no improvment, new cap and rotor no improvement, tear carb apart everything checked out, no improvment.
Can you guys help? This really has me frustrated and the car has to be somewhat race ready for tomorrow.
Car (truck?): 1982 El Camino
Engine: 383 9.8:1 compression, fed by an Edelbrock 1910 (Q-jet for all intents and purposes) and the fire is made by a MSD Pro Billet HEI with total timing at 38° (seems high, but it likes it).
The fuel pump has the ability to push way more fuel than it will need. I have an Aeromotive that can push up to 20 psi (18 on the average ). I have it regulated down to 7 psi in a return type system. The fuel is the factory hardline from the tank to the pump and up to the front where I have used 6 AN line to the the Aeromotive return type regulator, 6 AN to the carb and 6 AN all the way back to the tank.
I have no doubt the pump can keep up with it. It can suck my tank dry in about three minutes (17 gallons later...)
Now the problem, The car seems to go lean and surge above 4500 rpm at WOT. Keep in mind the shift point is 5500 rpm. I have tried several things including using the vacuum/boost port to give me a little more at WOT. I had it set to 12 psi at WOT and came to about 6 psi at idle. Ran it out the same way, started to surge like it had before around 4500 and up. I tried bringing the pressure down the other way and came down to 5 psi, just in the odd chance it worked. To say the least, it didn't help. I even replaced the distributor cap and rotor in case there was a chance the distributor had something to say about it. The parts that came off looked fine, a little worn, but in good condition. I pulled the carb apart to and checked all the float levels and little channels that Q-jets have, and it was as clean as it was when I put it on the first time. I have change the coarse filter before the pump and the fine filter at the carb.
Now, I can run it up to 4500 and nail it to WOT and it won't surge till 5000. It seems to me that I have a problem with getting gas into that tea cup of a fuel bowl. I moved the float level a little higher to see if it make a difference. It had no effect on the performance on the car.
I am out of things to try in an effort to make this run right.
Recap, new filters some improvement, pressure up no improvement, pressure down no improvment, new cap and rotor no improvement, tear carb apart everything checked out, no improvment.
Can you guys help? This really has me frustrated and the car has to be somewhat race ready for tomorrow.