Bypass / Dead Head

85rkyboby

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Nov 11, 2014

#1

• Nov 11, 2014

• #1

Can you use a bypass regulator as a dead head until you plumb a return hose?

 

hoopty5.0

mechanicus terribilis

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Nov 12, 2014

#2

• Nov 12, 2014

• #2

What are you trying to do?

 

jrichker

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Nov 12, 2014

#3

• Nov 12, 2014

• #3

85rkyboby said:

Can you use a bypass regulator as a dead head until you plumb a return hose?

Click to expand...

No.
It passes excess pressure back to the tank to maintain the proper pressure. Block the return line and the pressure goes up top the maximum that the pump will put out.

 

85rkyboby

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#4

• Nov 12, 2014

• #4

I have a stock mechanical pump on my 84. I need to regulate it down for the Edelbrock carb, so I was going to buy a regulator. Then I thought I might be able to put on a bypass regulator now, so that I don't have to buy a dead head for now & buy a bypass when I upgrade later.

 

Last edited: Nov 12, 2014

Boosted92LX

It's only an inch or two. What's the big deal?

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#5

• Nov 12, 2014

• #5

85rkyboby said:

I have a stock pump on my mechanical pump on my 84. I need to regulate it down for the Edelbrock carb, so I was going to buy a regulator. Then I thought I might be able to put on a bypass regulator now, so that I don't have to buy a dead head for now & buy a bypass when I upgrade later.

Click to expand...

So, to clarify, you have a carb and a mechanical fuel pump?

 

85rkyboby

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Nov 12, 2014

#6

• Nov 12, 2014

• #6

Boosted92LX said:

So, to clarify, you have a carb and a mechanical fuel pump?

Click to expand...

Yes.

 

85rkyboby

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Nov 12, 2014

#7

• Nov 12, 2014

• #7

edit fixed**

 

Boosted92LX

It's only an inch or two. What's the big deal?

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#8

• Nov 12, 2014

• #8

Dead head that sucker. Get a holley style fuel pressure regulator and rock on. They did it for years until efi came along. I never had a problem with it.

 

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Boosted92LX

It's only an inch or two. What's the big deal?

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#9

• Nov 12, 2014

• #9

A fuel pressure gauge is helpful though. I'd recommend that for sure.

 

85rkyboby

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Nov 12, 2014

#10

• Nov 12, 2014

• #10

Ok. The stock mechanical pump has the "return" outlet on it. I had an Edelbrock mechanical pump on there that didn't require a regulator, but sure enough it pumped out at 8psi! I had all sorts of cavitation and what not. As soon as I shut the car off it would take forever for it to start again. Thanks, I have two.

 

Boosted92LX

It's only an inch or two. What's the big deal?

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#11

• Nov 12, 2014

• #11

Before I got into fox bodies I had a 1970 fastback with a holley carb, mechanical fuel pump and no return line. Worked great. A friend of mine with a brand X car recently tried to dead head an efi turbo setup and boiled the fuel from heat with an electric pump. Not recommended in that application, but old school works just fine.

Good luck.

 

85rkyboby

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Nov 13, 2014

#12

• Nov 13, 2014

• #12

Thanks for your help and opinions @Boosted92LX

 

Boosted92LX

It's only an inch or two. What's the big deal?

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#13

• Nov 13, 2014

• #13

85rkyboby said:

Thanks for your help and opinions @Boosted92LX

Click to expand...

You are welcome sir.

 

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