which fuel pump

chris-stockton · Post by **chris-stockton** » Sun May 22, 2016 6:32 pm

hello,

i am thinking of investing in a new fuel pump for my westfield V8.

it will be running anywhere between 220 and 250 bhp and it uses a webber 500 4 barrel carb.

So i know that max pressure should be 5.5 to 6psi. But not sure how to work out the flow rate requirements?

Any pointers?

The one below looks very similar to whats in the car (no detail on it)

http://www.ebay.co.uk/itm/CARTER-P4070- ... Sw3mpXHwh-

Ian Anderson · Post by **Ian Anderson** » Sun May 22, 2016 9:48 pm

The Carter pumps are reasonable and a few GT40s run them.
These are in the 350hp range so should easily cope with your specification

I would definitely run a separate fuel pressure regulator
Road raft in the UK do them http://roadcraftuk.co.uk/index.php?rout ... =Fuel+pump

Ian

Robrover · Post by **Robrover** » Tue May 24, 2016 9:11 am

I'm using a Pierburg rollervane pump which is mounted inline on the crossmember outside the tank on my 4.6 SD1 with Eddy 500.

Supposed to support 340hp, rated at 3.9 - 5.5 psi, delivers 130 litres per hour (34.34GPH), self priming, lift capable, no return, very quiet, weighs 0.5kilo.

I think they're OE on some Porsches. Got it from Injectacarb

www.injectacarb.com.au

Ian Anderson · Post by **Ian Anderson** » Tue May 24, 2016 6:32 pm

Number I heard was 10 cc per hp per minute
250 *10*60 = 150 000 or 150 litres per hour

Ian

bigaldart · Post by **bigaldart** » Tue May 24, 2016 8:02 pm

you cannot hurt anything with a pump too big, however you can make an expensive loss with one too small. The cost of a decent pump is way less than getting this wrong.

Alan

mgbv8 · Post by **mgbv8** » Fri May 27, 2016 12:18 am

bigaldart wrote:you cannot hurt anything with a pump too big, however you can make an expensive loss with one too small. The cost of a decent pump is way less than getting this wrong.

Alan

What he said above

The Carter pump is noisy and will not do suction lift very well. Also the carter pump is a sealed unit and cannot be refurbished.

I've used Holley pumps for years now. I think that my Holley pumps (both Blue and Red) have been on the car since 2008 with the fuel regs that come in the kit from Real Steel. I use one pump for the carbs and one for the nitrous system. The Holley pumps can be repaired / refurbished as rotor vane kits are available and cheap. Both pumps flow well in excess of what I need.