So, long story short - to put the 3.5L's IM on a 3.0 would require the use of the top feed injectors which are of a different impedence than the 3.0's, correct? (and of course the fuel rail as well).

thanks,
allen

Intake ports on the GenII+ VQ35 heads are at a different angle, however per krismax they line up pretty well with a bit of dremeling/material removal.

Injectors are different impedance, however 4th gens ECU can handle it. You can go from Peak-n-Hold to Saturation type injectors, ie A32/Z32-->A33, but not the other way around, ie A33-->A32/Z32.

Our VQ35 appeared to have a returnless fuel rail too, surely that wouldn't work with a regular fuel pump will it?

allen

vsamoylov runs his VQ35 like that...can't believe it works properly though, since he doesn't even have a FRP just two dampers. However, for NA applications it might be okay.

Nismo3112 might have a solution to convert the non-return VQ35 rail to a returnless. Check his thread.

why would it not work properly without frp in vsamoylov max... a bit of explanation?

Without the restriction of a FPR, a constant fuel pressure isn't going to be maintained and especially the volume of fuel is going to vary. Will it run, yes...is it ideal, no.

Did you ever monitor the fuel pressure in your 5th gen or your brothers' 4th gen?

everything on my max runs normal. i am using a stock 96 fuel pump and i am not having any problems with fuel and fuel pressure. i am goign to put a 2k2 fuel pump sincei have a spare one laying around.

What fuel pressure are you seeing? Idle? WOT?

I'd bet much higher then stock, since it's deadheaded.

i never hooked up a fp gauge to see what i am running at.

WHy am I not surprised at that? As long as it runs it's fine, right?

The only way I can see that working is if the psi the pump pushes out, is higher than the psi the injectors are at @ WOT?

But at idle you would think it would run a little rich?

i think i need to get some education... what regulates the fp in 2k2 system...

The FPR is in hte fuel pump for 2k2+