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177 Posts
Hey guys. I have a stumble on my 460 and cant get it out.
First off i am running a stock rotating assembly D1 block including pistons and rods(arp studs) Heads are ported C8. with roller rockers. Cam is a extreme 4x4, 34-239-4, 226 intake, 234 exh at 0.50 lift. .554 intake liftand .574 exh lift. Push rods and springs all match cam. Intake is a stealth, and carb is a 800cfm Edelbrock thunder all mechanical. Igniton is mallroy brakerless and a hyfire 6AL box. Exhaust right now is a 1.7/8 lond tube chassis headers and dumps. All this is in a 94 f250 with sas dana 60, 10.25 sterling rear welded., 5.13 gears, 40 tsl with 11 inches lift. Running C-6 with a 2200 stahl converter and BW1356.
Now with that being said, timing is set at 16 inital and 32 degrees all in at 2900 mechanical advance only . single stage advance cure. What seems to happen is if i hit it hard in netural it is good, but if i hit it hard in gear it loads up and the stalls out. Sometimes she will quit other times u can hold throttle steady and it will clean up . That and if i dump the throttle hard while driving it will load up again.
Cleaned the carb last night and its good,, fuel pressure is a 6 pounds. Mech holley fuel pump 110gph. No linkage binding. Could the accelerator pump be to blame with too much fuel. ? Open to anything. Running it on premium and and c-12 at the moment, 5050 mix . Seems worse at running temp as well. No vacum leaks checked that too. Holds 22 pounds vacum at 2100 rpm.
Tim
First off i am running a stock rotating assembly D1 block including pistons and rods(arp studs) Heads are ported C8. with roller rockers. Cam is a extreme 4x4, 34-239-4, 226 intake, 234 exh at 0.50 lift. .554 intake liftand .574 exh lift. Push rods and springs all match cam. Intake is a stealth, and carb is a 800cfm Edelbrock thunder all mechanical. Igniton is mallroy brakerless and a hyfire 6AL box. Exhaust right now is a 1.7/8 lond tube chassis headers and dumps. All this is in a 94 f250 with sas dana 60, 10.25 sterling rear welded., 5.13 gears, 40 tsl with 11 inches lift. Running C-6 with a 2200 stahl converter and BW1356.
Now with that being said, timing is set at 16 inital and 32 degrees all in at 2900 mechanical advance only . single stage advance cure. What seems to happen is if i hit it hard in netural it is good, but if i hit it hard in gear it loads up and the stalls out. Sometimes she will quit other times u can hold throttle steady and it will clean up . That and if i dump the throttle hard while driving it will load up again.
Cleaned the carb last night and its good,, fuel pressure is a 6 pounds. Mech holley fuel pump 110gph. No linkage binding. Could the accelerator pump be to blame with too much fuel. ? Open to anything. Running it on premium and and c-12 at the moment, 5050 mix . Seems worse at running temp as well. No vacum leaks checked that too. Holds 22 pounds vacum at 2100 rpm.
Tim