MILD THUNDER

iTrader: (3)

Thank you for the kind words..

I went round and round on what fuel pump to run when I was redoing my engines a few years ago. You go on oso, and its hard to figure out what works. Because you'll have some guy who claims his mechanical pump wouldnt keep up with his 600HP engine, etc. So then you start thinking "Maybe I do need a big electric". But what he didnt tell you, was he was running a tiny pickup in the tank, too small diameter of fuel lines, so on and so forth.

For a simple single carb'ed 750-800HP setup, I see no good reason to go out and spend 400 dollars on a pump, another 200 for a return regulator, have to plumb in the return style regulator, wire in a fuel pump relay, and so on. Not when you could drop under 200 bucks on a pump and go boating. If you only had the merc sea pump and no block mounted provision, or EFI, or blow thru, then I'd understand. Don't get me wrong, those aeromotive pumps and return regulator is a fantastic setup, and will support a lot of power!

As for my setup, I am running -10 lines from my fuel tank to a wix 33405 water separator. Then I have a -10 line from the filter to the pump. On the outlet side of the pump, I have a single #8 line up to the fuel log that splits off to the 4 bowls. You do not want to skimp on the inlet side of the pumps. They push alot better than they pull.

I've seen some big power marine setups, use those six valve pumps, but the higher pressure ones, with a return style regulator. That too will support some good power carbed, and is probably the way to go if you're really RPM'ng the engine. I think once you start getting over 6000K rpm, the heavy fuel pump pushrod and light low pressure spring in the pump starts losing some control. Howards now makes a lightweight pushrod that supposed to help with that. Around 40 bucks for that pushrod. Hope this helps.

http://www.summitracing.com/parts/hr...make/chevrolet

Vinny P

This is the pump I run. This isn't a like a Holley p.o.s. pump. Maybe I don't need an electric Aeromotive, but it doesn't hurt to have it there. Everyone is entitled to rig their engines however they want, but my set up is hardly a half assed rigged solution.

http://www.claysmithcams.com/big-block-chevrolet/

As I said, people here will disagree with me.

MILD THUNDER

iTrader: (3)

thats the style pump I been talking about. You saying that pump doesnt keep up?

Vinny P

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No, I am not saying that. I just like to have more fuel delivery than is necessary. It has been my experience that in fuel delivery having more available is always the better choice.

Black Baja

iTrader: (2)

The Clay Smith pump is the same as the Holley pump they are talking about. I've had the two apart and the parts interchange. It's a bad mofo. I have no idea why someone would want to restrict the flow of there mechanical pump with a POS Aeromotive pump. For anyone who thinks they need a second pump for a backup to get you home/ don't go lean (cause the mechanical pump pumps alot more fuel than the electric) do a search and try to find one posting of a bad Clay Smith pump ever. Then call Clay Smith and ask for a rebuild kit see how ignorant they get with you when they tell you there pumps never go bad.

SB

iTrader: (1)

How about these mechanical pumps. 3 different models from 2400HP to 6000HP on gas.

http://www.weldonracing.com/products...uel+Pumps.html

LOL.

mike tkach

iTrader: (3)

i have 2 brand new clay smith pumps,i was going to use them on my fountain but decided to go with aeromotive a1000.the smith pumps are good to around 1000 hp but im way over that.

mike tkach

iTrader: (3)

that,s not fair sb,can,t bolt it in the stock location.

Black Baja

iTrader: (2)

I've seen them used on just under 1300 N/a applications. If it was me and I ran out of pump with the block mounted I would go with a belt driven pump. Electric pumps are not very consistent w
When you play around with motors that are greatly affectless by as little as .25lb fuel pressure you learn Aeromotive is about the worst.

MILD THUNDER

iTrader: (3)