When using a swirl pot, do both pumps (in-tank and external) need to be rated the same? Or doesn't it matter, in the sense the in-tank one could flow more/less than the external one?

Cheers

 

It wont matter Chris.

People tend to run a walbro in tank then to a 044 etc.

You could have an 044 in tank then another 044 external but no need.

Either of the above will be sufficient for 600bhp and some.

 

Bosch 044 will be fine with walbro in tank.

 

FYI I've read that a Bosch 044 is no good in tank and should only be used external because it generates a lot more heat than the OE item.

 

Brilliant, thanks guys

 

You better tell RCM to stop doing it then

 

Fair enough, that's why I said "I've read", but as always DYOR. The 044 pump draws a lot more current than the OE pump and numerous people have "reported" increased fuel temperature. There have been various posts on NASIOC and Pistonheads about it.

Weather this is a problem for the OP - I don't know; so don't just take my word for it :-)

 

Useful info here and nullfork has a valid point about 044s and increased fuel temp

http://bbs.22b.com/cgi-bin/ultimateb...c;f=9;t=002134

 

I have a bosch 040 pump in the tank which was suggested by Andy F.

It has happily run over 500bhp for the past 3 years.

I have an 044 and swirl pot ready to be installed but will wait for the next round of mapping before fitting them.

 

Thanks for the link Banny, will have a good read.

The reason I'm asking is I got my car mapped and get 521BHP, but Pat said my injectors maxed out at this (standard fuel pressure), but that power is quite low for 750cc injectors, so it could have something to do with the actual fuel pump, or Pat suggested the actual wiring may need re-doing.

I'm running a HRC 290lph in-tank, 750cc deatschwerk injectors, and a HKS FPR, and that is what maxed my power out, as the turbo still had some to give.
So I will change the FPR to something better, as that is noisey anyway.....and thought about adding a Swirl Pot and Pump, as that is a sensible idea anyway. I will also get some ID1000's in as well.

 

Also, the mapping day was very hot, and so was the fuel....so I guess that could have been the major issue?! No one mentioned that on the day though.......

 

Also.....standard fuel filter. Could that be an issue/hindrance?

 

How old is the filter?

 

Quite old I think....

What are new OE filters good for BHP wise?

 

Not sure really but If you are going to the hassle of changing it and fitting a swirl pot may as well get an inline one

750cc injectors will flow to around 570bhp

 

Yeah, Pat said the injectors should be flowing more, but said the duty was at the max he'd take them.

What inline filters are there? As the fuelab ones seem quite steep.

 

Im using fuelab, better to stick with a known quantity when it comes to fuelling ..........

 

Yeah, very true!

 

I understood that it will generate a little more heat but then the fuel is circulating a hot engine then it's fed back into the tank so it get's warm anyway.

I did say at the end of my post that there is no need for the 044 in tank when having one externaly.
I was simply answering the OP's question that he could do it either way.

Anyway no harm done

 

Cheers

I was wanting to keep the HRC 290lph in-tank if that's suitable (as it's already in)? Then I do have an old walbro I could use, or should I get a Bosch really?

 

Almost any pump should be suitable, right? You're only looking to fill the swirl pot, so you're not pumping against 4.5-5 bar (depending on your fuel pressure + boost), which means your in tank fuel pump will almost certainly outflow your inline pump by a significant margin.

 

You could use the walbro but the bosch would future proof it. I would go with the bosch personaly

 

Cheers. A few people have said a Bosch external, so will go with the masses