engine guys,,,build 468 won't run out
#22
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Location: Erie Pa.
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Well, I thought I found it, secondary accelerator pump not fully pressed at wot. Still had a a big squirt left. Adjusted the nut, went back out, same thing, 4000 rpm at 3/4 throttle, no grain at full. Called dui dist. got a guy that knew nothing and had to go ask someone each question. They said " doesn't sound like a dist. problem." Gee, thanks DUI. Next will regap the plugs, although starting to think maybe a carb problem. Holley marine 850 double pumper. Carb worked fine on last engine. Only difference on the carb is I removed the choke.
Last edited by daleroger; 09-18-2019 at 08:13 PM.
#25
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You probably fuk'd the accelerator pump spec's. You are supposed to have some arm movement left when at WOT as you don't want to bottom it out. Search net for Holley Accelerator Pump Lever Adjustment so you put it back to stock.
#26
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So you changed heads cam compression exhaust and ignition and reused carb. Did you tune the carb to the new motor on a dyno,? Checked afrs? Plug chops at various rpms and loads ? I keyed in when you said the arb worked great on old motor, this motor is a completely different anima
#27
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Location: Collierville, TN and Pickwick Lake
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Well, I thought I found it, secondary accelerator pump not fully pressed at wot. Still had a a big squirt left. Adjusted the nut, went back out, same thing, 4000 rpm at 3/4 throttle, no grain at full. Called dui dist. got a guy that knew nothing and had to go ask someone each question. They said " doesn't sound like a dist. problem." Gee, thanks DUI. Next will regap the plugs, although starting to think maybe a carb problem. Holley marine 850 double pumper. Carb worked fine on last engine. Only difference on the carb is I removed the choke.
#28
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And if you are going to remove the choke blade you might as well go all the way and mill the choke tower off. Then tune.