Ochez99

I was thinking about the Holley 12-125 because its quiter than the blue. Would the A1000 or a Walbro be better? Also should I run a return style fuel ststem that returns back to the tank? This for a carbed 5.7.

UOP

Not enough info. Car and engine specs? Intended usage?

In general a return style has benefits over a dead-head system. I personally run a Walbro 255 in-tank pump in my car with approximately 450 whp.

ZONES89RS

iTrader: (25)

There is a aeromotive street and strip that has a built in bypass regulator, and then there is the regular street and strip, that requires a bypass to be run and bypass regulator, either will be excellent for up to 700 HP, and they are priced decent.

Pop N Wood

iTrader: (1)

Don't go too big or it will just be extra noise. I'm starting to think an in tank Walbro with my external regulator would be perfect.

Chris05

I went with a Holley black, way loud. If you don't like loud keep away from that pump.

speedtigger

iTrader: (16)

I haven't tried one personally, but I have heard several reports that those Holley HP pumps are very quiet compared to the traditional vain pumps like my Aeromotive S/S.

Horsepwraddict

iTrader: (12)

I run a summit branded holley red pump dead headed and it works well, but again, its Noisey. This winter I will be upgrading the entire fuel system with a holley HP pump. I too have heard very good things about them being almost silent.

Ochez99

well its a 5.7 that has a 233/239 tsp cam, 862 heads that have milled(slightly) with 2.02 and 1.60 valves. and it has the victor jr intake with a 850 holley carb. its intended use will be a quick street engine for a 1967 c10. With the A1000 you dont have to do a return? Im kinda leaning towards the hp125 for the price

Pop N Wood

iTrader: (1)

That HP125 is a lot of pump for your motor. On the plus side it is big enough to support nitrous.