My plan for twin Bosch 044's in my '93 Civic. Input appreciated. Cavitation candidate? Starvation? Adequate?

Thanks guys.



- Louis

 

FWIW - Filters will be in the mix before and after pumps as well.

 

they work great, but why run them into a -10 then split them, then back into a -10. just run a dual feed sump run 2 -8 pickups, and then run them into a -10 y.. There will be more fuel going into each pump. Thats what we did on the old coupe... still works great......

 

pick up in: -12 to a 120 micron filter, y fitting -12 to -8 into the pumps

-6 from the pumps to a -6 y fitting to a -8 to the rail.

 

Jason,

Good question. Reason behind my diagram is that I'm running a sump that has already been welded into the tank. It's a ONE-FAB low profile sump, with only one fitting. If the setup will work fine, then I'd rather not go cutting and welding if I don't have to at this point.

 

Those one fab sumps blow anyways, they don't taper towards the fitting.

Any time you Y there's no sense in going two of one size into one of the same size. I'd do what jason said, the inlet and outlet on those pumps are tiny, no need for a -10 line on either side. I do -8 in and -6 out on those.

 

check valves? so if one fails it can sustain fuel pressure? might recirculate if both arent on? correct me if im wrong.

 

isnt there 2 jasons here...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrParks &raquo;</TD></TR><TR><TD CLASS="quote">isnt there 2 jasons here... </TD></TR></TABLE>
He means jason hunt.

Here is pics of my set up:

 

Mike,

You are correct, any time two pumps are run in parrallel (sp?), there should be a check valve installed post pump and pre-merge for each.

 

Save yourself the trouble and redo the one-fab sump. I had one on my car and it didnt work well. The pump would run dry in a corner with over a half tank of gas. Ended up having to cut it off and redo it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Those one fab sumps blow anyways, they don't taper towards the fitting. </TD></TR></TABLE>

What?! I thought One-Fab = Quality

 

Those pump work great! Exactly what Jason Hunt said is what we did. I would pull the tank and do a full race sump. they come with two ports and work well.

 

I have mine like this:

Full race sump &gt; -10an Line &gt; Fuel Filter &gt; Y &gt; 2 -8an lines &gt; 2 Bosch Pumps &gt; 2 -8an lines &gt; Y &gt; -10an line &gt; Filter &gt; Fuel rail

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbocivic94 &raquo;</TD></TR><TR><TD CLASS="quote">I have mine like this:

Full race sump &gt; -10an Line &gt; Fuel Filter &gt; Y &gt; 2 -8an lines &gt; 2 Bosch Pumps &gt; 2 -8an lines &gt; Y &gt; -10an line &gt; Filter &gt; Fuel rail</TD></TR></TABLE>


Same here.

Lou, i know we talked about this the other night...and i dont remember what i said, but now that i think about it, we did it just like Turbocivic94's

Hope it helps.


Interested in the check valve idea... At this time we are only running one pump, thought the system is plumbed for two. Once the second one goes on... i'd deff consider something like this for saftey. Even though those pumps are pretty reliable.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by littlebluecrx &raquo;</TD></TR><TR><TD CLASS="quote">they work great, but why run them into a -10 then split them, then back into a -10. just run a dual feed sump run 2 -8 pickups, and then run them into a -10 y.. There will be more fuel going into each pump. Thats what we did on the old coupe... still works great......</TD></TR></TABLE>
Exactly how mine is setup

 

I only see one -10 AN on the FR sump...?

 

Yeah, the FR sump only has one. I bet if you call they can make you a dual outlet.

The check valve idea can be good and bad. I kind of like the idea of the car dying if 1 pump fails. If you need 2 and 1 fails, the car will still run, just lean.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, the FR sump only has one. I bet if you call they can make you a dual outlet.

The check valve idea can be good and bad. I kind of like the idea of the car dying if 1 pump fails. If you need 2 and 1 fails, the car will still run, just lean.</TD></TR></TABLE>


do you think it would build almost no pressure at all with no check valves and a pump failure?


how much power do you think this setup is capable of with 1600 cc injectors?

 

I don't know what it would do, but i'd imagine it would make a single pump failure more noticable than if you had check valves in them at least.

A twin bosch setup should be good for ~ 1200whp on gas, it's A LOT of fuel! The 1600's will max out before the fuel pumps.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, the FR sump only has one. I bet if you call they can make you a dual outlet.

The check valve idea can be good and bad. I kind of like the idea of the car dying if 1 pump fails. If you need 2 and 1 fails, the car will still run, just lean.</TD></TR></TABLE>


Tony can call, you can call or I can call FR on that and check.

Also can run a Moroso sump, I do and it is fine

 

A single pump (044) recently supported over 800whp on an Audi build. I think two of them would be good for well past 1200 on gas, more like 14-1500.

I want to run both together as eventually I will be switching over to E85 and another bank of squirters.

 

800whp on a dynopack?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HybridKOOP &raquo;</TD></TR><TR><TD CLASS="quote">A single pump (044) recently supported over 800whp on an Audi build. I think two of them would be good for well past 1200 on gas, more like 14-1500.

I want to run both together as eventually I will be switching over to E85 and another bank of squirters.</TD></TR></TABLE>


I do believe Tony and Art maxed out a single Bosch before and know the limits of it.

OOPS sorry for all the name dropping ART!

 

Yeah, at 650whp on Art's car pressure was dropping. I trust what i've seen way more than what somebody on the internet does. Or, if you really want to be smart about it, look up the specs. Bosch lists the flow numbers and hp potential of that pump, and guess what, it matches exactly what we've seen in real life.