I was wondering soon my car need 650 injectors will it cause any probs if i just go ahead and use 800 ,kinda future proofing .

 

Well i went for 800, i was told that 650s could run out on 400 + bhp but depend on how much power your goin to run, Also not much diffrence in price .. either

 

I would say in general terms, choose the injectors that cover your fuelling requirements in the best possible way. 650's are fine for 450 bhp. Ideally you wouldn't want to run higher flow injectors than you need. It's an efficiency issue. That thinking applies for a lot of other things to do with cars incidentally, turbo choice, cam profile etc, just use only what you need to get where you want to go, and all your compromises will be little ones.

 

Yeh im only goin for 400bhp initially so if 800's work fine at 400bhp why not ,then they are ready for when if any other mods come.Just want to make sure they are gona work fine at 400bhp ish

 

I'm running 650's at 401 bhp on a 2 litre STi.

 

800cc top feed injectors on R.C.M site are 360 -420bhp. But then again so are the 650cc so i suppose they are both good for this kind of power application

 

I'm using 650's @ 445 on standard fuel pressure. Will be fitting a FPR when it comes time to crank up the MD321T.

 

Cheers for all the info guys its all good

 

I have been told that the stock ECU struggles to control 800cc injectors, causing idle and low rpm problems. So, if 650cc injectors give you the power you need now, it might be better to use those. Then, if you want >400bhp in the future you could up the fuel pressure.

That said, Iain Litchfield has some new 800cc injectors that he claims will be more controllable than the usual 800cc types. That's what I'll be using, but I am half expecting to have to upgrade from EcuTek to Simtek or Solaris...it's only money

 

Yes already spoke to the guy who will be doing my mapping and he's happy with 800cc but no more.Thanks for the info