Holley Help
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Lead Driver
Joined: Mar 2008
Posts: 7,165
Likes: 375
From: Near Los Angeles
Holley Help
Hey guys, I have a Holley 4160, an 1848, 465 cfm. It sat for 4 months while I changed the transmission from an auto to a manual. I changed the gaskets and blew through the primary side orifices. Had an issue eliminating a stumble, but found the right acc. pump discharge nozzle and the stumble vanished. However, after the initial take off, there is a lack of power as I gain speed and the rpms reach a certain level, then I get power. But, when I shift, the same thing happens again in the new gear.
Ideas? Is that due to too rich of an acc. pump shot?
Ideas? Is that due to too rich of an acc. pump shot?
Thread Starter
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Lead Driver
Joined: Mar 2008
Posts: 7,165
Likes: 375
From: Near Los Angeles
[QUOTE=440 sixpack;18649732]I assume your timing curve has been checked and you have no vacuum leaks.
Is this the engine build you have listed under the picture ? if so you're really on the light side for carburation.[/QUOT
Yes, you may be right. The built 300/4.9's really do love a nice Holley 600. But, on the other hand, I have also run a Quadrajet, and the primary side of my QJ was right around 200 cfm, not taking into account the toilet flusher secondaries.
Is this the engine build you have listed under the picture ? if so you're really on the light side for carburation.[/QUOT
Yes, you may be right. The built 300/4.9's really do love a nice Holley 600. But, on the other hand, I have also run a Quadrajet, and the primary side of my QJ was right around 200 cfm, not taking into account the toilet flusher secondaries.
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