NickJames Posted April 17, 2012 Report Share Posted April 17, 2012 I'm running 40 PWKs and at the end of a hill climb pass I end up going lean due to low bowl level. Fuel cap is modified, dual pingle, fuel pump, billet oversized bowls, power jets, floats are set high. The float valves appear to be non removable and I'm thinking this could be the weak link. Has anybody had any luck with modifying the float valve seat or needle? Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted April 17, 2012 Report Share Posted April 17, 2012 I'm running 40 PWKs and at the end of a hill climb pass I end up going lean due to low bowl level. Fuel cap is modified, dual pingle, fuel pump, billet oversized bowls, power jets, floats are set high. The float valves appear to be non removable and I'm thinking this could be the weak link. Has anybody had any luck with modifying the float valve seat or needle? Contact Tim @ Titan Racing. He does some nifty modifications to the needle valve/seat to allow more flow. I've done some of the mods myself and it made a good difference. If you are running a pump and billet bowls there is no way in hell you should ever be running out of fuel. Whats the flow-rate of your pump? Is it single inlet dual outlet? What size engine are you running all of this on? I've seen some huge engine setups need dual needle-valve setups to keep the bowls full, but those are 900+cc setups. - Jared Quote Link to comment Share on other sites More sharing options...
shanYE west Posted April 17, 2012 Report Share Posted April 17, 2012 I would think with a pump setup.. billet bowls wouldn't be needed.. perhaps there is a problem on the pump. maybe the pump needs to be rebuilt or there is a problem with the pulse signal. Quote Link to comment Share on other sites More sharing options...
NickJames Posted April 18, 2012 Author Report Share Posted April 18, 2012 Contact Tim @ Titan Racing. He does some nifty modifications to the needle valve/seat to allow more flow. I've done some of the mods myself and it made a good difference. If you are running a pump and billet bowls there is no way in hell you should ever be running out of fuel. Whats the flow-rate of your pump? Is it single inlet dual outlet? What size engine are you running all of this on? I've seen some huge engine setups need dual needle-valve setups to keep the bowls full, but those are 900+cc setups. - Jared Quote Link to comment Share on other sites More sharing options...
NickJames Posted April 18, 2012 Author Report Share Posted April 18, 2012 Contact Tim @ Titan Racing. He does some nifty modifications to the needle valve/seat to allow more flow. I've done some of the mods myself and it made a good difference. If you are running a pump and billet bowls there is no way in hell you should ever be running out of fuel. Whats the flow-rate of your pump? Is it single inlet dual outlet? What size engine are you running all of this on? I've seen some huge engine setups need dual needle-valve setups to keep the bowls full, but those are 900+cc setups. - Jared It is only a 4 mil cub with 65 bore. Running 35 LPG pump. But ordered 70 lph pump today. Fuel flow to carborator more than aduquit. So It seems the pump isn't it. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted April 18, 2012 Report Share Posted April 18, 2012 gotta use a black pump Quote Link to comment Share on other sites More sharing options...
NickJames Posted April 18, 2012 Author Report Share Posted April 18, 2012 gotta use a black pump Ordered it today, does that run same pressure with more flow? Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted April 18, 2012 Report Share Posted April 18, 2012 How long are you running? I run way bigger engines than a 4mil cub on gravity fed billet bowls. Quote Link to comment Share on other sites More sharing options...
NickJames Posted April 18, 2012 Author Report Share Posted April 18, 2012 How long are you running? I run way bigger engines than a 4mil cub on gravity fed billet bowls. Banshee hill, sand mt., NV . 10- 15 seconds. I've been told that I should be fine without , but they all have different carbs, which tells me I need a different float valve Assyria but they seem to be a press in unit. I hate to ditch these carbs and replace with something I have to re tune Quote Link to comment Share on other sites More sharing options...
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