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Engine won't pull R.P.M's

4K views 12 replies 7 participants last post by  fumotor069 
#1 ·
I put the car away last fall running a best of 10.60's at 124 mph. I back the valves off for winter{ this is a solid cam} Did some upgrades to suspension, added motor plate,engine limiters, new headers, Sent converter back to be loosened up,sent my quick fuel E-85 carb to Horsepower Innovations to be reworked. I bring the car out after these upgrades now the car will leave good but falls on it's face.Will not pull above 5000-5500 RPM in any gear.
I have checked timing set at 34*,tried a different msd box, different coil, Disconnected tach and shift light.Did not help the problem.I have checked valve lash, has not changed. I am thinking valve springs may be weak.
 
#3 ·
I forgot to say I flow tested fuel system with the original a1000 fuel pump,did not flow enough.The fuel pump was old so I replaced with a new a1000 that flowed better than the old one. I tried putting the 2 a1000 pumps together and the regulator would not return enough fuel.I could not get fuel pressure under 11 psi. I bought an magnafuel 500 fuel pump and regulator.
 
#5 ·
I checked the vent to fuel cell, was no blockage.I flow tested the fuel system with the cell cap off and on there was no flow difference, So i think that the vent is ok. I do have a valve spring tester.I will test the springs and see what happens. Thank you for all help. Larry
 
#13 ·
I sent the carb back. He took it a part and did not find why it did not work for me. He wants me to lock out the timing. He is putting a different tune in it that he said is too rich to drive on the street. My car is a track only car. I should have it back next week I hope.
 
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