Originally posted by Philv6
You guys are making it very difficult to not move into the alcohol/methanol injection game.
No.. you are over engineering something that is simple.
See if you pump too much alcohol into the motor, you get a drop in EGT's and the motor becomes lazy.. but doesnt KR.
Your wanting to know exactly how much "YOUR" motor will consume and be happy with. To which is impossible for anyone on the planet to predict. We can give you rule of thumb suggestions, but until you have a system setup in the car.. and are spraying..
If your wanting to know why, its simple. You run aftermarket turbo, ecm, cam, heads, exhuast,.. how can anyone know what are the charge air temps coming into your motor on a 70 degree day. When temps outside go to 100 degrees or 40 degrees.. things in the tune change. If the motor is heat soaked from sitting in traffic, or cool after being pulled of the trailer.. these things alter the requirements. If you make conditions whereas the motor can detonate more..obviously the requirments change and additional alky is needed. When conditions are optimal, then less is needed. Hence why I preach so much the in-car control.
See 94/6 may work great for 2 Slow's car. But maybe yours can see 92/8 or 90/10.. or 96/4.. See it requires methodical tuning to figure how much of each. Your only problem can come from spraying too little. Its extremely forgiving in dialing in if you have too much.
And if your car on alky runs fastest at 11.2 AFR, or 11.5 AFR.. the only place I know to answer that question is the track. Typically based on O2's and EGT's I see mid 1700's with no KR. And you may find the motor at 12.0 AFR will make the most power being sprayed.
Its not a fuel injector we're talking about. Its a mist nozzle shooting the air going into the motor. Its so barbaric.. its plain wonderful.
After doing many installs, and tuning.. its a walk in the park. I've done three installs in the last 7 days, on heavily modded cars.. its no issue. Believe it works.. hands down.
The pump/nozzle should be capable of delivering 45 ounces per minute. The pumps we use can deliver 1.8 GPM. So the pump isnt the issue. Additional nozzles can be added to increase the output accordingly. But at 45 ounces per minute, thats 7.5 ounces per 10 seconds. Which is usually enough to support any 10-11 second car.
HTH..