general23cmp

iTrader: (1)

What could I realistically expect in a forced induction setup in regards to rwhp between these two injector types?

I am assuming 80% duty cycle and boost referenced fuel pressure starting at 58psi. Using a BSFC of .65, I am getting about 530rwhp with the 60s and 630hp from the 80s using common flow rate data and 20% drivetrain loss. I know these numbers are low, so what am I missing here, and what could I expect out of these injs?

slow trap

iTrader: (22)

i don't know the formula but a set of 60 lb injectors boost referenced will be good for alot more than 530 rw. a person can probably go atleast 85 % on idc also without issues.

general23cmp

iTrader: (1)

Even at 85% dc, it would only add 25-30hp to those numbers, so I wonder what I'm missing. I know FI guys are getting more from these injectors than what the math says.

Aster

iTrader: (9)

I think those injectors are rated at 43psi not our 58psi. They are flowing more than 60 or 80 lb/hr on our fuel systems.

slow trap

iTrader: (22)

yeah, i forgot alot of them are rated on 3 bar and our systems are 4 bar.

general23cmp

iTrader: (1)

I understand. I used the data that would be input into our computers (58psi) to get those numbers.

general23cmp

iTrader: (1)

Anyone else? The ultimate question is how much rwhp could I expect to max out using the 60s and then using the 80s in a forced induction setup?

2001-WS6

I use a boost referenced setup with the 60s. The base fuel pressure is set at 60 PSI and the injectors have no problem rollup when the turbo is set to 20psi.

I've run 9.4s at 149mph in a 3700lbs car. You need a quality fuel pump to be safe but they can be pushed far with a the proper tuning. Needless to say, the safe calcuations numbers that you are using aren't quiet right.

I tune at the track but you'll have a better chance of backing into my HP with my numbers and the 20% drivetrain loss for a TH-400 trans than using the calc to figure out the true supported HP of these injectors.

Both injectors tune well for cruising so all you really need to do is decide how fast you want to go now and leave room for the furture when you want to go faster.

Rick

general23cmp

iTrader: (1)

Is that with pump gas? What AFR at WOT?

Do you think for a 408 using pump 93 gas and 15psi boost (max) that 60s would be ok?

Using common equations online, it looks as if you are getting over 1000HP easy at the flywheel with 60s. Almost 900HP at the wheels. Wow! What fuel pressure do you end up at?

2001-WS6

That's pump gas 94 octane and meth. The meth is primarily used for cooling in my setup. It's a 402ci engine with an 80mm turbo. I try to keep my AFR around 11.3 range most of the time.

The injectors are fine running up to 80psi on my setup. I've been using a magna fueler pump which moves plenty of fuel.

Rick

4SFEDZ

iTrader: (6)

i ran the 60's at 670 rwhp thru a th400, they weren't maxed out, but im goin bigger now.