Did some work on my fuel pumps today , because I am not comfortable with any of the filters available for the 044 for intank use I made my own. This made me have to shorten the assembly to get it to fit ...but it does fit . Now to install them and put up the fuel tank!

 

Speed flow one way chek valves ready to be installed after each pump.

 

as much as i love speedflow, those check valves will fail, and will give you grief, do away with them if you can. great build i'd love to do a semipp for my next motor, probably go with the revolution LIM kit myself

Brad.

 

What ?What ? please explain !!!

 

Impressive work..Keep us updated!

Should be a monster when finished

 

i've just seen a fair few of them fail lately. speedflow is still a great brand and theyre fittings look to be the best i've sseen anywhere.

Brad.

 

Thanks , I will .

After your warning I was a bit worried so I decided to do some investigating ! this is what I found;





As you can see it simply a spring and a plug , just two moving parts,




The reversing fuel pressure holds the plug in the shut position whilst the opposite happens when the fuel flow is forward . The plug seals against the valve body via a viton 'O' ring , this is the only possible point of failure I can see and this is ONLY if the wrong 'O' ring is used , to avoid this they supplied another which is alcohol compatible.



So I am comfortable with the design and operation of the valve ......so in it goes!
Thanks for the heads up though .

PS : I have a similarly designed check valve on my oil system , I have a CANTON ACCUSUMP pre oiler installed , and it has never missed a beat !

 

Sooooo, I completed the fuel supply and returnlines at the back of the car ,the supply circuit is the one with the NOS Y allowing the discharge from each fuel pump to join there .Each circuit also has its own cooler the smaller of which is actually a filter /cooler combo. located on the supply line and the larger on the return line.



Fuel coolers



Check valves installed.



Because it is soo much easier to access the exhaust system under the car when the fuel tank isn't there , I decided to hold off on mounting it so that I can wrap and install the exhaust system when I finally get the LAVA wrap I ordered two f@#%in weeks ago !!!! .

 

Are fuel coolers necessary? Have never thought about one for my car.

 

*pic of Racepak dash display*

Any reason you added a separate volt meter and fuel gauge? The racepak can display both, you just need a module for the fuel level but voltage is just a configuration away. You have 4 screens you can toggle through.

Btw, Please do not take this the wrong way, but don't you think there is a better way to run those fuel lines so it just does not look so hacked together? You have so many expensive and quality parts and IMO you are taking away from that by doing work that looks like that.


BTW, I like the fuel cooler, I will be adding one to my setup this winter as those dual 044's definitely will add some heat to the fuel.

 

The Racepack model I have is the display only unit, it communicates directly to the ECU via a module ,so to get fuel levet on it I will need to connect the sender to one of the computers analog inputs , that in itself would be too complicated and all my analog volt inputs are used up anyway, the gauge was just $40.

No offence taken I am always open to constructive critisism . I did try 100 times to get it looking neater but the space back there is just too tight , I may have a go at it again but I dont think the routing would be changed much.Maybe its because I am not too **** about things like this ,with me function always takes precident to form BTW I am open to sugestions!

Cool , nice to know i've influenced at least one person on here !

 

What kind of benefit will you get out of the fuel coolers? I know cooler fuel is obviously better, but there are several people making well over 600whp without fuel coolers. Yes, they are using auxilliary injection (water or meth), or race gas to help get that high, but I'm guessing you'll have auxilliary injection too. Seems like a lot of extra spots for failure for not much of a benefit.

 

Not meaning to be a smart *** , but it seems that you already know the benefits cooler fuel can bring ,for those who do not ,the benefits of cooler fuel are; cooler denser fuel which contributes to internal cooling and less reliance on AI , more stable a/f ratios , less propensity to detonate , improved efficiency/capacity of the fuel sustem and better cooling of the fuel pumps and fuel injectors. I have personnaly withessed an FC suffering from overheated fuel , after a couple minutes of normal running it would begin to miss , buck , loose power,show unstable fuel pressure and be very difficult to re- start after stopping. When checked the fuel pump couldn't be touched ! obviously
the fuel was boiling and vaporising in the pump. The fix was to simply direct the return flow away from th pumps suctionbut a cooler would have been a lot better since the system was still circulating hot fuel.! Ever wonder why the intake air temperature compensation map never works right ? its because the temperature of the fuel (which also gets hotter ) isnt considerd .After tuning my own car I had to go re-tune after just adding a cooler since the whole entire map went two points richer. Try feeling your fuel tank after a run , youll see how hot it gets , this isn't good for a couple 300LPH pumps that are on recycle 80% of the time.

Yes I will be, but this isn't a reason for me to be running hot fuel and risk premature failure of the high speed components of the fuel system. Maybe I might even make 800 + HP because of my coolers !!

Failure ? how does a cooler fail if it isn't over pressured ? have you ever seen a cooler fail ? I've never ......I'll take the chance , after all I have twin oil coolers , twin water coolers for my AW inter cooler and a water filled AW intercooler ! in the scheme of things its a small risk

 

I didn't know that about the fuel cooler info, good to know. Might add one into my fuel system in the future.

 

That is just one way to do it, the other way is shown below...


The above was taken from the racepak forum Racepak.com • View topic - fuel level post #2.

Although to add it now would be a waste of money as it would be expensive for the additional equipment to show exactly what you have already.


Re: the fuel lines, perhaps a different selection of fittings to route the lines a bit differently or a different component location to help make the lines route differently.

Also, what I think twinchargedrx7 is refering to failure points is a fitting coming loose or something like that as you have added many into the fuel system

BTW, you did not influence me; I had the idea for a fuel cooler for a few months now

 

Yep ! explored this option already but i decided it was just too expensive for just one paremeter when the alternative is a $40 gauge


As for the hoses , I'm already looking at my options, thanks.


and for the cooler , I guess great minds think alike

 

I still don't see why a fuel pump would ever run that hot, I've run big pumps and haven't had that problem. I'm not knocking it, cooler fuel is obviously better, but it just seems like a ton of extra work without much of a benefit. But if your pump is getting too hot to touch, then you obviously need to do something about it.


I just meant new places for something to spring a leak. That's a lot of fittings, they don't usually come loose on their own unless its user error, but thats still more fuel connections than I'd like to have

 

Noted, thank you for your constructive critism that'll help me build a better car , I'll keep you (all) posted, as were on the subject it seems that I may have to change both pumps now !! ,word of advice............. DO NOT LEAVE YOUR FUEL SYSTEM SITTING FOR A YEAR WITH GAS IN IT !!!!

 

On the fuel system check valves, remember pretty much ALL gas out there is 10% ethanol, it's getting hard (and more expensive) to find pure gas. It's possible the ethanol could be killing those O-rings.

EDIT: I see you're not in the US, so that might be a different case where you are. But still worth thinking about.

Dale

 

If I'm not mistaken, while the Bosch 044 pump is both incredibly reliable and high flowing it does have the reputation for heating the fuel. I think running the coolers is a great idea for your setup.

Fantastic build! What is the car going to be primarily used for?

 

This is sooo true ! how could I forget !! We use methanol here and I was actuallu\y a shift supervisor on a local 1300 MTPD methanol plant which supplied the local refinery with the stuff !! Thanks for this , I went ahead and replaced the O rings with the metanol tolerant ones, thanks again.


Thanks ! It is primarily a street machine , but I do have a passion for drag racing.

 

So on your advice I looked at it again and realized that the problem is that everything is too close together and is jumbled up. I moved the checkvalves , switched around a few fittings and now .........





I think a great improvement was made , THANKS again!

 

Nice job on the DIY parts, I wish I had those skills. Still working on it

 

Thanks ! stick with it , it will pay off !

Found a stainless steel ANACONDA in my back yard !........






LOL its just my custom 4 " exhaust before wrapping, the barrel shown is a 5" BORLA XR1 ,not shown at the back there is a pair of 4" XR1's for high flow and minimum noise (i'm getting a bit too old for that now ) , the're a bit banged up after serving previous duty under the car. I plan to paint them black with VHT header paint for my own custom NOIR system ,i'll put up pics when I'm done restoring them, .

 

the lines looks nice and much neater! interesting info on the oil cooler....!