will changing the stock fuel injectors to the jcw injectors or something similar, make much of a difference? considering all the other mods i have done.

 

I would wait till you get to the point of a head and cam before larger injectors would be neccessary.

 

It might make a difference up top when you're using more fuel, but keep in mind that you will need a new tune to take advantage of the larger injectors. Our injectors work by passing a given voltage through the injector. Many of the larger injectors either reduce the resistance or increase the nozzle size. Anyways, a tune needs to sort out the needed voltage at each rev/load-point. Otherwise, you will most certainly run _richer_ and lose a bit of power, especially in the low rev ranges, when less fuel would be required, but your ECU would still be giving the previously necessary signal/voltage. That is how I understand it.

 

I would change them. The additional boost, that you have alon g with the added spark and headers all require more fuel at upper revs. I got much better driveability and lot better power thoughout. Also much safer to run a little rich then lean.

 

Completely agreed, but pig rich ruins gas mileage and can ruin valve seals [I think...]. Anyways, it's best to run a 'safe-rich' and that can only be dialed in by tuning IMO.

 

thanks for everyones responce to this.......