Holly elec. fuel pump

[superman__65]

what size fittings do i need to get install the Holly red pump? can i just use the factory lines and fittings?do they need thread sealant?

[Knanthrup]

On 2005-04-10 23:39, superman__65 wrote:

what size fittings do i need to get install the Holly red pump? can i just use the factory lines and fittings?do they need thread sealant?



They\'re 3/8\" thread fittings. You can just use factory lines if you would like. I would recommend keeping 3/8\" line from where the metal lines end on the pass. side frame up to the carb itself. Thread sealant is probably a good idea just for cheap insurance.

[superman__65]

thanks for the help.

[superman__65]

sorry not done yet. where is the best place to mount it in a blazer and will the fact. fittings work?

[Knanthrup]

They recommend mounting it as close to the fuel source as possible. What year truck is this going into? You\'re supposed to run the filters before the pump in order to keep the pump clean and working so you have to take into consideration when mounting it that you need to have room for filter and pump.



Here\'s the instructions regarding installation for the Holley pump you\'re talking about:

Holley Electric Fuel Pumps (http://static.summitracing.com/global/images/instructions/hly-12-802.pdf)



Ideally you would probably want to mount it underneath on the frame somewhere. The tricky part is that those lines are metal so it may be hard to tap into them. I\'m running a mech vic jr. pump right now so i can\'t comment on the mounting of an elec. pump, but im sure there are plenty of guys on here that can help you with that.

[superman__65]

it is going into a 89 blazer. thanks again for the help.

[bowtie316]

I\'m Not extremely familiar with a 89 blazer. Did it have fuel injection? If it did, you will need to remove the stock electric fuel pump from inside the tank so the new pump does not have to pull fuel through it. Again, mount the pump as close to the tank as possible and it needs to be close to the bottom of the tank to help siphon feed the pump. That pump has female 3/8 NPT (national pipe thread) ports and it comes with fitting to go to 3/8 hose. You should be able to run a short piece of hose between the pump and the factory lines. It is also good insurance to run a filter before the pump and another right before the carburator. Also the float level should be adjusted if your running a holley. Oh yea, those are tapered fittings and will need some sort of sealant, i.e. teflon tape or sealant, just be sure not to get any inside the lines.

[Jeffyboy]

On 2005-04-11 00:23, Knanthrup wrote:

You\'re supposed to run the filters before the pump in order to keep the pump clean and working



Sorry for hijacking your post, but does this mean the fuel filter should be before the mechanical pump in my truck? I\'ve got it up by the carb. Or does it even matter in this case?

[superman__65]

thanks

[bowtie316]

After the pump is fine for a mechanical pump. A mechanical pump is much more resilient to trash that may come down the line. An electric pump on the other hand, needs very clean fuel.

[Jeffyboy]

Gotcha. Thanks.

[Knanthrup]

On 2005-04-11 23:26, bowtie316 wrote:

After the pump is fine for a mechanical pump. A mechanical pump is much more resilient to trash that may come down the line. An electric pump on the other hand, needs very clean fuel.



exactly what i was gonna say http://www.s10v8.com/images/smilies/icon_smile.gif