This question might have been discussed before but i can't find it. How much fuel is being put intot he 4G94 engine? What size injectors are used on it. I am interested in getting RPW quad throttle bodies and the biggest problem i can see so far is how much fuel should be going in. If i could get the stock specs i should be able to find out an acceptable amount of fuel that should be going into each cyc. for that system to work.

 

Basically what you're asking for is impossible to quantify with any degree of accuracy unless you're looking at the ECU's mapping. Besides the basic fuel map ECU's use several additional trims to modify fuel flow. Coolant temp, air intake temp, manifold absolute pressure (though I don't know the breadth of the stock sensor), O2 feedback, accel trim, and a host of other functions can all add and detract from the amount of fuel the ECU adds.

We have 235cc injectors.

I believe RPW requires the use of a standalone (the recommend Haltech) with the Quad TB's, so be forewarned...if you're planning on using standalone engine management you'd better: 1. Be very well versed in engine functions and have at least some experience with engine management, 2. Have another car so downtime will not greatly effect you, or 3. Know a shop that's very good with standalones and have some extra scratch to pay for it.

 

If I'm not mistaken, RPW no longer offer the quad TB. Instead, they are working on a dual. The quad TB caused too many tuning issue which is why they stopped making it.

The dual TB as yet to be released