A couple fuel pump and hobbs switch questions
04-22-2014, 11:49 PM
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A couple fuel pump and hobbs switch questions I have a couple of questions on fuel pumps but first here is my setup:
421 CID (4.03 bore X 4.125 stroke)
E85
95# Deatschwerks injectors
FAST 102
14.8:1 compression
242/252 .629/.629 113 lsa camshaft
AI 232 cc 243 heads (2.055 intake/1.55 exhaust valves)
I have a dual pump set up and I can't find any information on using hobbs switches for the second pump on NA applications, I know it is a pressure or boost switch so does that mean for NA I should just run both 255s all the time, meaning it isn't needed for NA? I know with e85 and my mods a single 255 will not keep up. I am also considering just ditching the dual pumps and going with the AEM 320 e85 pump, do you think that would be enough for my application?
421 CID (4.03 bore X 4.125 stroke)
E85
95# Deatschwerks injectors
FAST 102
14.8:1 compression
242/252 .629/.629 113 lsa camshaft
AI 232 cc 243 heads (2.055 intake/1.55 exhaust valves)
I have a dual pump set up and I can't find any information on using hobbs switches for the second pump on NA applications, I know it is a pressure or boost switch so does that mean for NA I should just run both 255s all the time, meaning it isn't needed for NA? I know with e85 and my mods a single 255 will not keep up. I am also considering just ditching the dual pumps and going with the AEM 320 e85 pump, do you think that would be enough for my application?
04-23-2014, 08:16 AM
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Yes cable throttle. The trigger switch would work related to fuel pressure right, meaning it would turn the pump on at a particular fuel pressure? Any idea where to get one I can't seem to find one. That way it should come on when needed right? I just have no idea as far as what fuel pressure I would set it to come on at.
04-26-2016, 11:29 AM
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need help please I have a couple of questions on fuel pumps but first here is my setup:
421 CID (4.03 bore X 4.125 stroke)
E85
95# Deatschwerks injectors
FAST 102
14.8:1 compression
242/252 .629/.629 113 lsa camshaft
AI 232 cc 243 heads (2.055 intake/1.55 exhaust valves)
I have a dual pump set up and I can't find any information on using hobbs switches for the second pump on NA applications, I know it is a pressure or boost switch so does that mean for NA I should just run both 255s all the time, meaning it isn't needed for NA? I know with e85 and my mods a single 255 will not keep up. I am also considering just ditching the dual pumps and going with the AEM 320 e85 pump, do you think that would be enough for my application?
421 CID (4.03 bore X 4.125 stroke)
E85
95# Deatschwerks injectors
FAST 102
14.8:1 compression
242/252 .629/.629 113 lsa camshaft
AI 232 cc 243 heads (2.055 intake/1.55 exhaust valves)
I have a dual pump set up and I can't find any information on using hobbs switches for the second pump on NA applications, I know it is a pressure or boost switch so does that mean for NA I should just run both 255s all the time, meaning it isn't needed for NA? I know with e85 and my mods a single 255 will not keep up. I am also considering just ditching the dual pumps and going with the AEM 320 e85 pump, do you think that would be enough for my application?
