nesta Posted September 20, 2011 Report Posted September 20, 2011 Hey I need some help with my blow thru 4k I'm using a Holley 180 problem I'm having is when I just crack the throttle it starts to run really rough if I keep going it stalls but if I wind the mixture srew right out it doesn't run rough down low but it runs rough up top. Hope some can help me out with this. Problem. Cheers Quote
GJM85 Posted September 20, 2011 Report Posted September 20, 2011 If the mixture screw is less than half a turn out at lean best idle it indicates a smaller idler jet is required. If the mixture screw is more than 1 & 1/2 turn out it indicates a laarger idler jet is required. Though often, what appears to be a lean condition turns out to be a rich condition. Check your plugs. If they are black and sooty, it's rich. Is your carb boost prepped, or boxed inside a plenum? Or does it have a boost reference line to the fuel bowl? Quote
nesta Posted September 21, 2011 Author Report Posted September 21, 2011 I did get the carb rebuilt and re bushed the shop that did the work on it i told them that I was doing a blow thru turbo I don't know what they did to prep it. But I do know that it has a vent at the top so I can see some The fuel bowl that's about as much I know about it they said it would be fine for blow thru. I'm still learning about it all from reading people post. On here Quote
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