couple of problems/questions...
You would want a wideband o2 sensor.
Is this a daily driver or a weekend warrior type vehicle for you?
I would ditch the 750hp and go to a different carb. From the way you describe your intake it sounds like you have an edelbrock performer rpm intake(dual plane) and the edelbrock ignition box. The holley 750hp is a more race oriented carb and is going to give you alot of headaches with the type of driving you intend to do.
I would look at a vacuum secondary carb maybe in the 650cfm range. Maybe even look at the edelbrock carbs like Ravenous mentioned.
I would look at a vacuum secondary carb maybe in the 650cfm range. Maybe even look at the edelbrock carbs like Ravenous mentioned.
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I would ditch the 750hp and go to a different carb. From the way you describe your intake it sounds like you have an edelbrock performer rpm intake(dual plane) and the edelbrock ignition box. The holley 750hp is a more race oriented carb and is going to give you alot of headaches with the type of driving you intend to do.
I would look at a vacuum secondary carb maybe in the 650cfm range. Maybe even look at the edelbrock carbs like Ravenous mentioned.
I would look at a vacuum secondary carb maybe in the 650cfm range. Maybe even look at the edelbrock carbs like Ravenous mentioned.
honestly i don't wanna do that...last thing i wanna do is buy a new carb...i rather try to fix this one..its BRAND NEW..probly has like 8 hours MAX use!
u can use this to see what size carb best suits your needs. What size cam are u running?
http://www.4secondsflat.com/Carb_CFM_Calculator.html
http://www.4secondsflat.com/Carb_CFM_Calculator.html
You can use it. You should probably learn to tune it on your own though because you are probably going to want to adjust it quite often.
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u can use this to see what size carb best suits your needs. What size cam are u running?
http://www.4secondsflat.com/Carb_CFM_Calculator.html
http://www.4secondsflat.com/Carb_CFM_Calculator.html
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I don't mean to come off sounding like a jerk, but I think you're getting some bad advice. Holley carbs aren't VooDoo or rocket science. They're pretty simple IMHO. They are more performance oriented, so yes, they do normally require some tuning. But, my experience with them is they run great and trouble free once properly tuned. I have used Edelbrock (Carter AFB) type carbs and like them also, but don't ditch your carb just yet. The carb you have is a really nice carb.
As was stated previously, you FIRST and FOREMOST need to verify ACTUAL fuel pressure before you do any carb tuning or anything else for that matter. ESPECIALLY if you're only seeing a true 2.5 psi fuel pressure, you need to address that issue first. All this tuning advice you're getting (including changing carbs) doesn't do you one bit of good. You need a MINIMUM of 4 psi at WOT and a max around 7 psi of fuel pressure at idle. You can spend all the time and money you want on carbs, jets, extensions, power valves, but they won't do diddly squat if you don't have the the proper fuel pressure.
Did you ever tell what type of fuel pump and regulator you're using? Do you use a regulator? Is it a return type or dead head? I'd be curious to know your exact setup.
As was stated previously, you FIRST and FOREMOST need to verify ACTUAL fuel pressure before you do any carb tuning or anything else for that matter. ESPECIALLY if you're only seeing a true 2.5 psi fuel pressure, you need to address that issue first. All this tuning advice you're getting (including changing carbs) doesn't do you one bit of good. You need a MINIMUM of 4 psi at WOT and a max around 7 psi of fuel pressure at idle. You can spend all the time and money you want on carbs, jets, extensions, power valves, but they won't do diddly squat if you don't have the the proper fuel pressure.
Did you ever tell what type of fuel pump and regulator you're using? Do you use a regulator? Is it a return type or dead head? I'd be curious to know your exact setup.
How do you have the fuel pump wired? If your fuel pressure is dropping 4psi when it gets hot, it has nothing to do with how the carb is tuned. Make shure that you have a good ground and heavy enough gauge wire to power the pump. If you are just cruising around the pump probably has enough pressure to keep the car running and fuel in the bowls, but when you hit it and it uses all of the fuel in the bowls it can no longer keep up.