I know there are not many people out there that have this to be a concern, but I wanted to make a thread to bring in experiences and listen to view points on the subject.

As of right now, for those people looking at close to 1000rwhp or more the only options are the CJM twin canister and SP triple hanger. There is always the option of fuel cell, but for a street/strip car most dont want to mess with a cell. I am really not concerned with even trying to go the cell route.

The CJM is by far the best engineered from a standpoint of trying to keep full functionality of the complex Z fueltank, and allowing utilization of low fuel levels and keeping a properly fuctioning siphon. Its only drawback, for those looking for ultra high HP, is the use of only 2 walbro pumps. Also, nobody knows for sure if the canister will stay full enough to feed the pumps when you are reaching their limits in HP. Charles said it looked good in all their testing, but the real world could be different.

The SP hanger, obviously does away with the factory canister design in favor of the ability to use 3 walbro pumps. This option sounds pretty good when being on the safe side and only using the gas tank until 1/2 full. After that I am not sure if anyone has tested it WOT at lower levels. Also, it would seem their solution for siphoning from the driver side tank would make running lower fuel pressures very hard. 3 pumps returning to a pinhole size oriphace would seem to skyrocket fuel pressure (if this assumption is wrong, please someone tell me).

If anyone has done any DIY fuel solutions involving modifying the stock canister for more pumps or using inline pumps in conjuction with the factory canistered walbro, I would love for you to bring your information into this thread.

Pretty much just looking for opinions, point of views and experiences involving this topic. Discuss please!

 

With very little data to go on, I'd really like to hear what CJM and SP think about each others designs. Not sure either one would feel comfortable providing candid responses in a public thread, especially with little data to support any theoretical claim. Perhaps best taken to PM?

 

I have a fuel cell in mine and its great on the street. Just depends on how you set it up.

 

CJM vs SP DEBATE! I don't think the debate would stay within forum rules though...

Anyone want to bring AAM in on it too?

 

Pics and more information please. I searched but all your pics are red X's. You have me semi-interested in a cell.

As of right now AAM doesnt have a solution that will compete with the other 2. If they have any new designs, now is the time to reveal .

 

i would put a CJM pump on the passenger side and a SP pump on the driver side.... 3000HP worth of fuel and a canister for low tank control.... make sure you use a -12 return line.

 

Of course! Why didnt I think of that

 

I just got the SP triple hanger. After it's installed, I'll post my experiences with it.

 

customer reviews will probably be the best thing for this thread... we all know the basic theoretical advantages and disadvantages of both setups... but how those pros and cons come into play in the real world are what actually matter, and the crossover points to where the pros and cons will take effect are only known by those putting miles on their pumps.

 

+1, I would like more info as well. I have been planning on installing a cell for a while now, for reasons completely different then the OP, but I'd still like to see your setup. I'm mainly interested in your pump selection and placement.

 

I have the SP triple pump hangar in mine.

asside from me sitting inside the fuel tank giving real-time data here's what I can tell you.

I have had zero problems. Not really sure what opinions I can give on it. I made 769rwhp so I've had all 3 pumps running at once.

And like I said before I have had my tank fuel level low. Put 18.5 gallons in one time.
I use common sense though, when the light goes on, I don't beat on it. But as long as their is enough fuel that the lights isn't on.....well its on like donkey kong then.

I think a better question is what are you going to use to control the 3 pumps? With the pro-efi not all pumps are on all the time. 1 is on all the time and the other 2 stage in one at a time.

Tom

 

Iv got a haltech, so controlling them isnt an issue. Whats your base fuel pressure at?

 

thom, your fp was at 55 at gld the other day correct?

 

It sits somewhere around there. I have to look again. Larry maybe to chime in and tell before I get a chance to look tonight.

Tom

 

I haven't seen this information summarized all in one place. I have an idea about which system is better for which application, but I'd be guessing.

For street, for road racing, for drag racing, up to 600 whp, up to 800 whp, over 800 whp... A little matrix by an expert would be nice.

I mean even for those with pumps in place, whose going to be testing with the type of data logging necessary to be able to report on the efficiency or operation of the fuel setup?

 

Up to 500whp - Walbro w/ RFS
500-1000whp - CJ Twin Walbro or APS extreme (potential trouble with high base fuel pressure after venturi fix)
1000+whp - No clear/perfect solution, time to get creative. Fuel cell, triple hanger etc.

 

Only caveat I'd put on this is that these numbers are for gasoline (leaded or unleaded)

When we start talking E85, things change.

Tom

 

Thanks Hal - that helps simplify the decision making process.

 

Good thread

 

exactly my feelings.... maybe even 550 whp for just walbro w/ rfs for confort zone...i know some have ran fine for a while in the 580whp range