90dxcrx

If this is posted in the wrong place sorry but will someone move for me i dont know how to move them
I have a semi built ls-v it has gsr crank,eagle rods,9.8:1 wisecos,stock bore with block guard,head is stock with all ferrea valve train and gsr cams with skunk 2 intake. In all the setup is nothing special but with 750cc injectors and a 6162s precision turbo fuel is maxed out @ 12psi, although it makes 340hp and 255tq to the wheels is not bad since its my daily driver but this is not what i was looking for i wanted more. I know bigger injectors will do the job i just wanted to know if the is another way.
(stock fuel lines with walbo 255 in tank and aftermarket fuel rail) any input would be helpful and yes my tuner is very good at what he does before any one goes bashing the tune

If this is posted in the wrong place sorry but will someone move for me i dont know how to move them

corvetteking

This is confusing... Those injectors are good for 450whp... I've seen it dOne... What engine management are you using??

90dxcrx

Chrome or uberdata done by rlz

racebum

something is up. 750s can safely make 450 crank hp and as stated above 450whp if ran on higher pressure and pushed to the limit.

i'm starting to think this calculator should be a sticky in here

http://www.fuelinjectorconnection.co...widercalc.html

90dxcrx

I had a t4 with .57 air and made 396 @15 but switched turbo and now maxes out at 12 psi on same setup

Turbo-LS

iTrader: (4)

Yeah somthing is up, i ran rc750's in the past made 425whp and had penty of injector left for another 50-60whp. That was on a static fuel pressure of 50psi.

What base pressure are you starting at? What fuel pump are you running? Some how your runnning out of fuel due probably to starvation IE: cloged filter, weak or to smal pump

AutoSensei

@ OP:
1. What type of fuel are you tuning on?
2. Can you verify that fuel pressure was/is holding all the way to redline?

MR.johnson

^ i was just about to ask those same questions.

Marlon88

We had a similar problem on a car , turned out to be a dirty fuel filter. can you monitor the fuel pressure when the car is on boost?

90dxcrx

fuel is 93 oct and the entire fuel system is stock other than the aftermarket rail,injectors and the walbro 255 in the tank, lines and fitter are stock

Muckman

iTrader: (2)

I second dirty filter. Get a pressure gauge, Im sure its low.

90dxcrx

im ordering the kit that goes from the firewall to the rail its -6an fittings and line with inline filter (40 microns) and just for fun im gettin either 1000 or 1200injectors (found a better deal on the 1200 or would just go with the 1000) so theres no way ill run out of fuel,the motor will go before i run out of fuel i want no excuses to not make the power that i wanted originally on stock sleeves, I would like for it to hold but im to the point now that I could care less i want to see it go or blow hopfully go for a while but atleast 6 mo till the dragstrip closes for the winter

340whp 255wtq is not to bad but i want 450whp and 300wtq and a low 11 sec pas in the 1/4(what psi would this take any educated quesses)

Muckman

iTrader: (2)

40 micron filter after the fuel pump would do nothing. The sock filter included with your Walbro fuel pump is 31 micron so any filter that is bigger will not filter anything.

mar778c

iTrader: (1)

Bolded is why you think your car is indicating low. Just for giggles, go to a dynojet local to your area and get a couple of pulls. I bet you will see those missing ponies.

Turbo-LS

iTrader: (4)

should have 100 before the pump and 10 after the pump IMO but others have different opinions, thats what i used to run on my hatch with a aeromotive a1000. in stock line configuration i just rock a stock filter call it a day lol

093turbo16

iTrader: (2)

I see this type of thing all the time.

First thing you should do it double check your fuel pump installation.

Make sure that the line from the pump to the stock fitting is good and intact. You would not believe how many times I have had to fix this problem while cars are on the dyno. Either the clamp is half *** put on there and causing it to leak OR the owner decides to use vacuum line in the fuel tank, which will cause it to blow a hole right through it.

Then check your filter sock and make sure that is still in decent shape, have also seen a few cars have rusted tanks from sitting that clog the fuel pump sock.

Then comes the most obvious... make sure you have gas in the car.

90dxcrx

what would be recomended as a in line filter when i do the line kit

Turbo-LS

iTrader: (4)

30 micron or less