A buddy wants to upgrade his fuel delivery system on his 24valve. What kind of performance gains can be achieved with this upgrade? Currently he is just running a EZ, and getting injectors soon. Also what pump should he go with?

 

There seems to be varying opinions on this subject, and I do not think there is one right answer. I am under warranty and kept changing factory lift pumps because of low pressures. I finally got to the point of getting not one but two pusher pumps. One Carter and one Holley Black. I put the Holley in the factory LP position, and the Carter in the frame rails. I HAD TO INSTALL A RELAY because the pump voltage is variable, and cannot be run in parallel. This relay came in a kit with the Carter pump. I think Wildcat has a Holley kit for sale, not sure what the price is. BTW there are those who feel the Holley Blue is the way to go. I have never used one and don't know much about it. The possibilities are endless, so be creative and I am sure you will be successful. LE

 

Stay as far away from the Holley Black as you possibly can. I have had a crap load of problems with the bypass valve getting stuck and screwing up my FP. I'm getting ready to buy a PE4200 with stainless line and everything. This is an older pump (bout 2 months) that this guy bought brand new and never got around to putting it on. So it should be good. I know the PE pumps have had a bad run. You won't gain any power upgrading the fuel suppply system. You will gain some peace of mind though. And possibly some MPG and power if your current pump isn't running right.

 

there's no real performance gain from the fuel line upgrade, but the bigger lines will keep you fuel pressure up to par even when using a box and that will save your vp44 and possibly extend the life of the fasctory lift

I'm just running the big lines and factory pump with an edge comp and rv275's .........pressure nev er drops below 10psi @ WOT used to go down to 6 with the stock lines

talk to rod @ wildcat diesel he's got a nice kit and he even sells a pe pump if you feel you must change out the factory lift

 

I suggest getting the banjos with larger holes, these will suffice up the 400hp area.

Tell him to change his fuel filter on a regular basis also.

--Justin

 

When HVAC changed to his fuel system that used larger lines, AN fittings in place if banjos, and a pump with a pressure that would not drop, he claims he saw an increase on the dyno of 30 or so hp. Of course he was around the 600hp level then. :crazy:

I think what Justin said will suffice.

 

There will be an article on the Wildcat Fuel system posted soon. I went from the upgraded banjo bolts to the -8AN lines and the results are ;D.

 

Heres what has been working for me...
Dump all banjos and go to the metric fittings. Make sure the fittings are not the ones that drop the ID to what the banjo bolts are...waste of time and money.

I went through a pile of different set ups and systems...the one Stake is going to post a review on is the one I am using and used for several thousand miles with a Holley Blue...theres other threads about that on here. Note: Not all pumps are alike...some folks have had issues with the Blue but not nearly as oftrn as the Carter, Black and even the PE has had problems...I had one that lasted about 100 miles.

I personally do not prefer the dual pump system...no two pumps will match each other for flow and pressure, especially if one is weaker or a different model then the other.
So then you have premature wear and tear on the pumps...one pushing not enough and the other not getting enough and stressing trying to pull the fuel not only from the tank but thru the weaker pump too. As well, the VP-44 will be stressed and when one pump fails then you have a wall of restriction. I know there are some folks that have done a by-pass system etc etc. I just do not think its going to benefit.

You need to push/pull/lift the fuel thru the easiest possible route. that route must be as close as possible to the same inner Diameter throughout the path. If not, you will have bottlenecks causing irratic flow characteristics and stress on the pumps...all the pumps including the VP-44.

Again, just my findings from testing a pile of different configurations. And man am I glad I am done changing those systems out. ;D

I had oversized banjos with the factory pump the Black and the Blue Holley...no comparison to this system I developed with the matched lines. Several folks are running the stock lift pump with these lines and getting great results.

Scotty eh

 

I second that scotty EH!

Got the kit with my stock lifter and gained about 4+ PSI at WOT with my setup! I was down around 3 PSI WOT before now Im 7+ so Im happy! Cruise is also up about 2PSI.

Yep Nothing but ;D EH scotty?

 

[quote author=Jamie Attridge link=board=7;threadid=18291;start=0#msg171613 date=1060715783]
I second that scotty EH!

Got the kit with my stock lifter and gained about 4+ PSI at WOT with my setup! I was down around 3 PSI WOT before now Im 7+ so Im happy! Cruise is also up about 2PSI.

Yep Nothing but ;D EH scotty?
[/quote]

From one Canuck to another...EH u betcha eh

 

actually I have a question .........how do you put the rubber line into the lift pump on

I was short one of those adaptor fittings (aparently niether rod or I can count) so I just did the braided steel lines and have not got a round to getting a hold of rod for another adaptor fitting for the hose barb .........but how does the big line go on the hard steel line at the firewall .........is it the right size to just slip on or do I have to modify it ......and how do you get the old one off

 

Dodge Ram get the barbed fitting and put the rubber hose on it. Then thread the fitting onto the pump witht he hose. Climb under the truck and route the hose. Take an X-Acto knife and slice down the side of the old like that is on the truck attached to the steel line. It will come right off. Now as an extra precaution I took one of the compression clamps from part of the fuel system I had extraced. I slid the hose over with the clamp and put it on there just for security. It worked very well. The new hose even clips into the factory clip the old line was in.

 

ok cool so it just fits right on the steel line and I just slice the old one to get it off .........thanks

 

Yep thats about it. If you want to clamp it for security do so if not I don't see a problem but how I beat on my truck I sure installed it! ;D

 

Don't change that line with a full tank of fuel.

Been there, done that,,,,, still smell like diesel. :