I still need to buy a mechanical pump for the 347, and I'm curious if the stock pump can keep up with the low rpm i plan to run? If not, would an 80 psi pump be enough?

 

on a 347 i would go no less the 195gph electric pump......

 

yeah......probably about double overkill. I know of guys running 347 on nitrous that don't run that big of a pump. Plus, I'm sticking with mechanical

 

347 is not even a 351, and not even close to a 460. They have standard stock pumps on those engines?

 

Franklin, I'm not quite sure what you're asking. Are you hinting at the fact that the 347 is smaller than the aforementioned engines, so it should be fine on the stock pump? Does the 302 share the same fuel pump with all those engines? If it does, then I see what you're saying.

 

I tend to want to agree with Franklin but have no data to back it up, it's just a feeling....

 

The mechanical fuel pump is the same between the 302 and the 351W. At least that's what O'Reillys site shows.

 

If you have to buy a new pump, why don't you opt for a mechanical Edelbrock pump ?? That's all my 460 has, as approved by my machinist. Eddy too lists the same part number for 302 and the 351W. The price difference between a stock one and the Edelbrock pump is pretty much negligible considering the money and time you have into a 347 build.

 

I like that approach, especially since it says that no fuel regulator is needed for use with their carbs. The cost for that pump from Amazon is $106.80 with free shipping, and the cost of an E'brock fuel pressure regulator alone from Jegs is $116.99. Maybe there's a cheaper regulator available, but at that price the pump looks to be a better deal and makes the installation of an E'brock carb, which can't handle the pressure of the stock pump, more straightforward.

 

Gary, so the edelbrock carb I have will be best run by an edelbrock fuel pump, and I won't need to grab a new fuel regulator? I was planning on running an edelbrock pump anyways, but thats good to know.

 

Here's what the E'brock site says about their pumps, with the underlining mine:Seems pretty straightforward to me - does not require a regulator. Therefore less plumbing, less chance for the gas to get hot, less chance for leaks, etc. I'm sold.

 

I'm sold Gary. I guess I'll see if my motor shop has one, otherwise I'll order one on monday

 

Reps to displacement4me for the suggestion. I've been dreading adding the regulator due to the hassle of mounting it and running the lines. I've been trying to make the engine compartment less cluttered rather than more, and a regulator was a set in the wrong direction.

 

Appreciate it Gary.

The cherry on the cake for the Eddy combo can be using their braided hose pump to carb kit connected to their rebuildable high flow fuel filter and inlet kit.

Edelbrock Filters and Accessories

 

Thanks! Hadn't considered that, either. However, I'm not sure the complete package will work on the 351M. I see SBF and 429/460 listed, but not the 351M/400 and I don't know the differences in distance and routing so don't know it'll work. Guess I could call them.

Having said that, the filter element doesn't thrill me. Don't know what filtration capability the pleated paper ones I'm using have, but I'd bet it is more than the 40 micron that the E'brock has - especially given that it is a screen. Since our tanks are getting rather old and spitting rust, I like to run the see-thru pleated paper filters as I know they take out a lot of the gunk because I can see it. I've had the accelerator pump discharge passages clog up due to that silt when running screen filters, but not since I went to paper.