Just so I can say I told you so...

[Hoffman]

I've been helping a friend of mine do a 351W swap into his 1989 mustang. We ripped out the old EFI stuff and got everything stuffed in. However this has been the argument.
I personally know that you should not use the factory EFI fuel pump for a carb setup, because of pressure etc. etc. However he tends to think it will work because this person told him so, sort of thing.
So, the setup is as follows, intank EFI pump ran to a Moroso Fuel log with built in regulator (The kind you adjust by putting in the little washers). This has a feed line going to the carb, and another outlet going to the existing fuel return line.
What really gets me fired up, is that the pressure is staying at 7 psi, with the pump running but the engine off. Since we haven't figured out the spark problem yet I couldn't tell you of any issues when running.
I'm a person who gets easily irritated by a person who wants to do a half assed job, especially if they ignore sound advice when I am trying to help them. So is he awaiting an unpleasant suprise, and I get to rub it in his face, or is this cluster*%#& actually going to work?

 

[86bluecobra]

the truth is it can work. I however did not do it that way. i went and got a pick-up for my gas tank ran new 3/8 lines and a new low psi electric pump to a regulator and then to my carb. 7 psi and lots of fuel. much better way to do it i believe.

 

[50Dreamer]

I don't have a carb car but correct me if im wrong...Carb cars have larger dia. fuel lines?

 

[pb_paulie_b]

That would have to be hard as hell on the pump.

 

[69Rcode_Mach1]

It can be done but it is the wrong way to do it. Atleast he put a regulator on it. Otherwise he would have been scratching his head at why his car runs so rich.

 

[Hoffman]

He's using the stock 5.0 fuel pump, and the stock feed and return lines. At first I was shaking my head. However he did get it started, and the fuel pressure at idle was around 7 lbs. Then he tried to drive it, then the fuel pressure spiked to around 14 psi. Heres where im saying I told you so... Then he gets the bright idea to regulate it.... TWICE!!! At this point, I'm done, I don't even want to look at it. I got his used EFI parts and got the hell out.

 

[blue302stang]

I am not an expert, but with the carbs you are going to run the lower pressure as stated, but at lower pressure you are getting higher volume, so when using a high pressure pump you will be getting a lower volume which would not be enough to run a carb'd car. Thats why alot of carb'd cars run the big fuel lines, to supply a high volume of fuel.

 

[Modular2v]

i have two extra holley blues if he wants to do it the right way