I'm going with a full 3.5 soon, '00 VI, PF TB, and stock ECU, the OO VI has 290CC injectors, will the fuel pressure be ok? Will my ECU work fine with the full 3.5?

 

How are you planning to mate the VQ35 heads to the VQ30 DEK manifold?

What year car do you have?

 

'97 Rob Tilley (TILLEYS99) is going to do it, anyone have any answers to my questions... I know KRISMAX also mated the DEK manifold with full 3.5 on a '96.

 

Chris had to do alot of modification to make it work...
You will be fine withhte larger injectors on 4th gen ECU. Mine is perfect, not running rich at all.

 

why wouldn't you just use the VQ35 VIM?

 

that is my exact question. they say it flows better. maybe because they aren not using a full vq35 swap?

 

Is it true that the 3.5 injectors are smaller than the DE-K injectors, and with the 3.5 injectors, and rail, it will run lean on a 4th gen ECU?

IceY2K1? ( of injectors)

 

270cc vs 290cc, I don't know if that 20cc will make a difference. They have the same part number, so if you buy new ones, they are prob 270cc.

 

3.5 injectors = DE-K injectors. The 3.5's just run at a higher fuel pressure.

 

wrong,the dek's are 350z injectors and on 3.5 are 315cc's

Actually whats funny is the 350z is using dek injstors because dek's used them first

 

For the umteenth time

FBJC100 (VQ30DE-K and 350Z VQ35)

290cc/min @ 3.0 BAR (VQ30DE-K)
335cc/min @ 3.5 BAR (350Z, G35)


FBJC101 (FWD VQ35s)
270cc/min @ 3.0 BAR (No known application)
315cc/min @ 3.5 BAR (FWD VQ35s)

 

What will the BAR be if we use all those parts off the 4th gen? Wouldn't it stay at 3.0 unless we used a fuel regulator? Wouldn't that be cheaper than buying 00-01 injectors, for what little difference it makes?

 

3bar...if you have a Walbro, it would be higher/better. Just run the VQ35 Altima injectors you have with a Walbro and you'll be fine.

Running stock VQ30 3bar fuel pressure supports...
270cc@80% DC ~210whp
270cc@100%DC ~262whp

Running a Walbro 255lph HP at ~3.5bar fuel pressure supports...
315cc@80% DC ~245whp
315cc@100%DC ~306whp

 

Hi noobie here again, So you can change from 3.0 (44psi) bar to 3.5 bar (52psi) via an adjustable FPR, and an engine bay mounted fuel psi guage correct? Are these numbers at idle, or WOT?