dville_gt

iTrader: (5)

Going to put in a sumped factory tank in my turbo fox body and considering leaving the 8 gallon cell I have in the spare tire well. Thinking about using the cell for either e85 (if my fuel system will support it) or race gas, and using the stock sumped tank for pump gas. I'll install ball valves on both inlets and outlets.

When I want to put it on kill mode I'll simply cut off the stock tank inlet/outlet, and swap the inlet/outlet hoses over to the 8 gallon cell. When it's time to switch back I'll swap them back over.

Anyone doing anything like this? I can't commit to e85 full time as it is not available everywhere and seems like a PITA and just dumping in race gas at the track will leave me with inconsistent blends and inevitably burning up whatever is left on the drive home (wasting race gas $$$).

Thoughts?

stangtrader

iTrader: (2)

Seems like it would be a huge pain having to swap lines out,why not use a yblock with the check ***** before the y so both tanks feed in to that then the y goes to the pump? That would make it alot simpler. Now you got me thinking fof my mustang hmmm

TurboS10

iTrader: (12)

Intimd8 did it around 8 yrs ago in his Fbody.

TheLS1Lover

Like Nelsons Octane on Demand?

TurboS10

iTrader: (12)

NRE's is automatic with two fuel systems and PCM control $$$$$$
Jim's had valves IIRC. ~880 rwhp twin 61's 355 LT1

Reckless

iTrader: (9)

Not sure if I'd give Nelson all the credit, we did it with the Super Sleeper Nova back in 2006. Twin Superchargers and Octane on Demand:

http://www.hotrod.com/featuredvehicl.../photo_18.html

atomic 6

This is the first one I have ever seen in 2005 on a TurboBuick engine.

http://www.turbomalibu.com/dualfuelsystem.htm

And this guy was running the factory buick computer, pretty smart dude.

This was always in the back of my mind until we built the NovaWagon, and Mike's mustang.

There is a guy in a town near Omaha, that has what you are talking about, two tanks, and some valves to control the flow and return. Works good for him in his 1200hp street car. He was on DragWeek last year with us, and I think his car was in one of the issues. Red Mustang with an old SBC in it.

In the old days, before alky injection,e85,etc, we use to go to the track empty the tank and just add race fuel. What a pain that was, but the boost we wanted to run in the Grand Nationals we had to have that insurance of the race fuel.

The dual fuel set-ups make it really easy, but they have there problems also.

Twice as many filters, lots of hoses(potential leaks), and more weight than if you only have one system.

I like mine, but I would not want to do another one.

I would probably just do two tanks and and the valves.

Reckless

iTrader: (9)

Yeah I bet we had 100+ pounds of braided lines on the Nova. I was ordering lines and fittings for days

gnx7

iTrader: (28)

The Holley EFi system can control 16 injectors so I'm guessing you could run 1 set for pump gas and the 2nd set of inj for e85 and use the Holley to control it.

Reckless

iTrader: (9)

The Big Stuff 3 also has this option (added cost)

L92 fox

iTrader: (2)

Why couldn't you have one tank with 93 in it and run it all the time and have another tank with race gas in it with another pump that kicks on at a certain psi. You can Y them together with check valves.

MaxxMitchell

iTrader: (15)

Then add more Ys and ball valves for the returns so that you dont dump your C16 into the pump gas tank.

Reckless

iTrader: (9)

We had two tanks, stock tank with 93 octane for cruising. Then the second tank with race gas, and it would activate at a given boost level through the ECU. Have to have two sets of injectors for that setup though

PROLSXSS

atomic 6 that setup you posted is very simple but should work on a standard ECU LS i like it might have to give it a try

Wicked69

Here is what I would do. Like some mentioned use a "Y" block. Set it up so one fuel line comes from each tank with a check valve on the one you don't want to use for street driving. Have the second pump set on a hobbs switch like 4psi. So anytime you romp on it it will utilize the second pump and the second tank of fuel.

qqwqeqwrqwqtq

Actually it was automatic, dual fuel systems, BS3 staged injection back in 05. What took you guys so long

https://ls1tech.com/forums/forced-in...ress-pics.html

skinnies

iTrader: (33)

I remember reading about this setup back then and wanting to do it....7yrs later I've still yet to get around to doing it, this year we will though, I will make time for it!

chuntington101

With the Holley and BF3 can you totally remove the pump gas (ie 100% race fuel)? What do you do about fuel presure regulators? surely you would be goijg from almost full fuel flow to nothing over a short rpm period....

Chris.

427

iTrader: (3)

The BS3 system keeps the primary injector on and just adds your secondary. It is just staged injection, but you can separate the fuel system and run dual fuel. Your fuel percentage is controlled by your inj flow rate. You could run a 24# primary (pump gas) injector with a 225 secondary (race fuel) injector, this would give you 90% race gas when your running both injectors. I ran 36# on pump and 65# on C16, this percentage was safe at 1100hp flywheel over the 20,000+ miles I drove and the car is still driving today around Chicago.

Kurt

qqwqeqwrqwqtq

We tried running a big split on the injectors and it didn't work out.

The low duty cycle switch point to revert back to the primary injectors is 30% if I remember correctly, so when the primary injectors hit (I think we could only raise it up to 80%) and the large secondaries came on, total IDC fell below 30% and it would act like a rev limiter just switching back and forth.

After a bunch of emails and calls to John asking if he would allow access to raise the high switch point above 80% and the low switch point below 30% (and also asking for more control -at- the switchpoint), I never received a response.

Soo, in the end we needed to run larger primary injectors so at the switch point it came back down to around 35% IDC, or high enough above the minimum level so it didn't go into "rev limiter mode"