89406Iroc

What are people doing for fuel system upgrades? Lines, pumps, Miniram fuel rail mods? Thanks

bbunting

Just did a fuel system upgrade.

Summit racing 15 gallon cell with sending unit, dual -10 outlets
Aeromotive pump 11104
Aeromotive filter 12302

Ran a Y from both -10's into a -12, then into the filter, into the pump, -10 to the rails. -8 return line to the tank.

GP406Z

I drilled a hole in the top of the tank , used a -10 bulkhead fitting,and bent a piece of -10 alum. line to mimick the shape of the factory stuff.-10 into a BG filter with a metal screen (DO NOT USE A PAPER FILTER HERE)-10 into the Weldon,-8 out,into a K&N 10 micron paper filter up to the as-shipped TPIS rail (except for a -8 inlet fitting,no other mods to rails).From the driver side rail -6 to a Weldon reg.,from the reg. -6 into the factory feed line used for a return.Fuel for the N2O is picked up from the -4 port on the reg.
works fine both on and off the spray,pressure is rock steady at 50# WOT.
later,
Glen

89406Iroc

thanks for all the input. I want to stick with the factory tank cause I drive the car alot. I am currently running the stock system except the 255lph fuel pump and adjustable reg. I think I need to upgrade this winter.

bbunting

You can always add a sump to the factory tank. Are your 30 lb injectors at 100% duty cycle? If they are, calculate how much fuel you need. You may just need 36/42 lb per hour injectors.

Say 550 HP X .45=247.50
247.50/8=30.93 lb. per hr injectors

What is your rail pressure? If it is OK, you might just skip the fuel upgrade. If you have more HP, upgrade.

89406Iroc

Picking up pressure signal at line before fuel rail. Fuel Pressure is ok but I went to the dyno and it is leaning out on the top end. The dyno guy said it could be a fuel volume problem, saying that I may need bigger lines etc.

bbunting

My stock lines were good to over 500 HP at the wheels. If you watch the FP gauge as you accelerate, does the pressure drop with RPM? We cranked my FP to 50 lbs at idle, and the injectors to 100% duty cycle, and on the dyno, FP dropped to 25-26 lbs. under WOT. LEAN. (15:1 A/F ratio) That would be a good test-watch the FP under load-if it drops with RPM, delivery problem.

89406Iroc

Fuel pressure holds steady. That's why I couldn't understand a fuel volume problem. Shouldn't pressure and volume be related. I am looking at stepping up nitrous this winter so I am going to probably plan on upgrade.
BTW bbunting do you have any pics with the draglites? What size are you running?

bbunting

Do you have a chip of DFI? Need to check injector pulse width. Need to increase relative to RPM. Who did your chip?

89406Iroc

It's an Ed wright chip. Couldn't tell you anything about it other than what I am watching on my scan tool (snap-on).

bbunting

Ed is top notch-call him and tell him EXACTLY where is drops off-he can fix it. Send the dyno graphs with the A/F ratio. Guessing that he can add some more fuel easily. Are you in IC?

89406Iroc

Who do you talk to? I call but I can't get by the guy that answers the phone. I don't know if he is just an order taker or what.

bbunting

If they **** you off, go to Cerra Racing in Rock Island-they can burn you a Superchip while it is on the dyno-only way to do it right the first time. Didn't you go there already? With Jeremiah's gang? The did LS1 edit on my Vette and gained 21 HP/23 TQE.

www.cerraracing.com

89406Iroc

Yeah I was down there with their camaro gang . I don't know when it happened but I went racing the weekend after and I had terrible knock retard (16 degrees). So I don't know if it dyno'd OK or if it dyno'd with the retard. I am working on it now and am going to try to get it back down to do another pull and have some time to toy with some stuff.

Lehrjet

Hey C-

Its Jere with the TT WS6 and ghost flames. I would email ed its the best way to get ahold of him. ewright@gorilla.net he did my PCM on my car and the A/F was flatline perfect. He checks his email every night so email him today and he will have an answer for you in the morning. Otherwise Brian has delt with about every problem you can have on his camaro so he has alot of experience to share with. I am not much help but bbetween Ed, Brian, and Cerra you are in good hands.

Jere

89406Iroc

Thanks Jere. I'll try to e-mail hime tonight. Are you going to B-bops?

Lehrjet

No, i am in dallas till tomorrow. I have been traveling a lot for work. I goto Seattle next week, but i want to make it to b-bops saturday. Brian said he was going take his IROC there thursday, its a white one with a huge @$$ S/C on it, so if you go, look him up.

Jere

bbunting

Uh, actually it blew another head gasket...so I will be taking the F350

89ProchargedROC

explain this to me...i've been thinking about it and why do you need a metal filter on the sunction side when there isn't hardly any pressure?

GP406Z

Weldon pumps are gravity fed,they can`t suck fuel very well.The paper filter is way too restrictive to let gas pass thru it with no pressure to push it. Bob from Weldon told me to use a numerically higher than 100 micron filter before it (metal mesh is around 240 mic.)and a 10 micron filter after it.It has plenty of stregnth push thru the paper. I had a paper filter before it and would lose fuel pressure after about an hour driving around as it would starve the pump.Since switching filters,no more pressure drop and it isn`t as noisy.One of these days I`ll get the voltage controller to slow down the pump while cruising since the engine doesn`t need that much volume under those conditions
Myself,Tory and Don B. have our pumps/filters set up as per Bob at Weldon.

BlownBird

Only thing I would like to add to what Glen said would be... ALL efi pumps are pushers, and cannot suck through the paper filters.

Take a look at how a stock setup is. Has the large porus "sock" in the tank (before the pump). And the fine filter after the pump. Carcraft just had a big writeup on this a couple of issues ago, and suggested the same thing for all EFI fuel system setup's.

LETHALRACER

I have a Miniram and I hated how the fuel lines came out next to the TPS. No room there. So a friend of mine and I came up with an idea that works great for us. We took off the stock lines back to the hard lines that come up into the engine bay. We then went and got two 120deg -8, one 45deg -8, one 90deg -8 and about six feet of steel braided -8 fuel line. Connect the two 120deg fittings to the stock hard line on the frame. Connect the 45deg to the passanger fuel rail (intake). Connect the 90deg to the driver side fuel rail (return). Run the braided line down the back past the distributor, between the steering rod and the power brake booster and connect the hoses to the fittings and viola you are done. I great re route that is out of the way and looks awsome. I can get some pictures if you want them.

bbunting