I planned on replacing the pump, still am not sure the injectors will support the 800hp goal. I actually enlarged the passages and fittings in a separator mount. Would have rather just bought one though!

Before you get too far into this, (in my pics) take a look at the throttle linkage plate that mounts to the throttle body adapter. Look how it angles down, there will most likely be interference with the injectors in an injector plate.

Been playing with that all evening. I think I have it all figured out. Now, I just need to make it work. Luckily, I have 2 of them in the shop right now to use for mock up. I'll have to angle the injectors a little bit to get them to clear the linkage. I'm trying to not have to make a new linkage, but it is really in a bad spot. As a last resort, I'll make a completely new linkage mount. Hopefully it won't come to that. Like I said, I think I have it figured out.

Thanks for looking out.
Eddie

By the way JRider, nice looking setup with the 8-71.

As for the injectors, you won't be able to squeeze 800 from them. About 750 is the most I have ever seen anyone get from them. At that power level, they are just about at 100% duty cycle. Those injectors aren't that durable, so running them at full capacity isn't going to make them happy. What concerns me is if one fails. The engine will continue to run but will be lean and could certainly hurt some parts. You would never know what happened until it was to late.
Eddie

Very cool! I looked into this last year but gave up when I noticed the linkage interference. If this works out it may change my cam selection! What will need to done to the harness and how many injectors are you planning on using?

Agree with post 64. You do not want 100% duty cycle from your injector(s) - DC is the length of time the injector(s) remains open, - you really want to be ideally at 80% duty cycle. Also too big for injector sizing is not good either as your mid range and down will suffer. There is a basic table formula to get you close..

brake horsepower x brake specific fuel consumption
___________________________________________ = flow- ( lbs/hr )

# of injectors x .80

if you do not have your dyno data in front of you or none at all then it is recommended for your brake specific fuel consumption to be used in the formula as follows.

1.NA engines = 0.5
2.Nitrous = 0.55
3. Forced induction = 0.60

There is another basic table formula to use about increasing or decreasing your fuel pressures. Injectors are normally are flow rated at 43 to 44 psi. Flow rates will increase when the supply fuel pressure increases. There is a formula conversion from static flow of an injector rate at a given flow pressure to its flow at a different pressure. I will have to look that one up as I forgot or maybe someone can post it. Anyways just posting for an FYI.

I don't like using that Formula on injectors.

It assumes the injectors motor can open (or close) against the other pressure #1 and it assumes there is no time change for how fast it opens at that other pressure.

Some injectors, like the TBI's, can have a very difficult time with a bunch more pressure.
On that note, some TBI injectors can be okay with a bunch more, some can't. I don't have the listing on what can or not as the TBI system is more ancient than the world we walk on.

Test on a mchine first. Don't always let math get in the way. Against what physicists say, Math can lie.

It will be set up for 8 injectors. It will have a sub harness that will connect all 8 injectors to a plug. You will need to pull back the harness some and cut out the stock injector plugs. You will then wire in the other end of the plug so that the new injectors can just plug into it. We do it on all of our harnesses now. It's nice to be able to just unplug all of the injectors with just one plug.

Here is a pic of an injector sub harness for another engine.
Eddie

The stock computer can run 8 injectors? Is it as simple as 4 new injector wires spliced into 2 old injector wires?

Absolutely. I've run as many as 12. That ECM has 2 seperate injector drivers, so each driver controls 4 injectors. It's the same ECM that is used in a 500 EFI and it runs 8 injectors. You can just splice in the new injector leads but the plugs will be different when switching to an EV1 style injector. So, you will have to change the original plugs to the newer style plugs.
Eddie