300zx Z31 turbo question: vg30et?

[andrave]

I have an infiniti M30 with the vg30ET engine and I wanted to know how the turbo system on the vg30ET works...it uses one turbo and a crosspipe to feed the pass. side cyl bank to the driver's, where the turbo sits? just wondering, pics would help.

[Altiman94]

I didn't know there was a turbo version of the M30 out there?

[andrave]

sorry I meant I wanted to know how it worked on the Z, thats why I posted this in the Z section... wondered if the engines/5spd transmissions would swap.

[evildky]

well I don't know much about the M30 but if it has a VG30E or any VG for that matter the trannies will bolt up, and it sounds like you got the turbo right, there is a crosspipe that comes over behind the motor and hooks into the drivers side exhaust manifold and then they go into the turbo as one exhaust

you thinking of turbocharging the M30, if that's what your thinking all I can say is do it and send me the pic's

you really need a 400hp vg30ET sleeper M30 makes me want to make my own

[andrave]

I really want to but I doubt I will anytime soon.

[AZ-ZBum]

pictures of a VG30ET not in the car (makes seeing the turbo and manifold easier) are available here:http://www.netsnapshot.com/b?KEY=14&ACCOUNT=1977

[andrave]

man that page loaded slow... I have cable and it still took like 15 minsthanks for the pics they help a lot. Turbo is all the way on the bottom, AC compressor on top? Sure looks like it would bolt right in, there is just a big empty space on the M30 where the turbo is. whats the compression on the ET compared to the regular naturally aspirated model? injector size? I wonder if I could get away with a rising rate fuel pressure regulator and stock 300zx turbo manifolds and downpipe... that would be bad ***. or the larger injectors and an SAFC

[evildky]

I seem to recall it being around 8.5:1 for the turbo cars

[AZ-ZBum]

in the Z31 the difference is because of the pistons only.all the NAs were 9.0:184-87 turbos were 7.8:188-89 turbos were 8.3:1

A couple people have successfully run 20+ psi intercooled on stock bottom end NA pistons. Just make sure you have fuel to do that power.

turbo injectors are ~287cc IIRC.

[andrave]

9.0:1 seems like it would be fine for low pressure turboing...

[Syntax360]

or the larger injectors and an SAFC

ditch the SAFC idea - i don't think anyone has been able to get the thing to work very well w/ a z31 ecu (are u going to use a z31 ecu?).

[andrave]

nah if i went that route I'd bolt the turbos onto the M30, but I just got the injectors replaced under the safety recall, so since I know the fuel system is up to snuff and brand new, I'm tempted to put a walbro fuel pump and an FMU... I've been thinking about it a lot....but my fiancee says no (for now..)

[AZ-ZBum]

nah if i went that route I'd bolt the turbos onto the M30, but I just got the injectors replaced under the safety recall, so since I know the fuel system is up to snuff and brand new, I'm tempted to put a walbro fuel pump and an FMU... I've been thinking about it a lot....but my fiancee says no (for now..)

Stock injectors on an NA are around 180 cc/min (oft debated, but never over 200) . A stock NA fuel system is NOT up to snuff for modifying. Stock turbo injectors 259cc/min. In other words. TINY.

[andrave]

yeah but the rising rate fuel pressure effectively increases that.

[AZ-ZBum]

yeah but the rising rate fuel pressure effectively increases that.

Not that much. And then you run the risk of the injectors not being able to open properly or finally failing all together.

Ghetto rigging only gets you by for so long. Eventually, it will fail and then the fix will end up costing you more money in the long run. Pay a little now or a lot later. Your choise.

[andrave]

I wouldn't call a proven fuel management strategy that comes standard with nearly every low boost turbo kit on the market "ghetto rigging," but I guess youre entitled to your own uninformed opinion.

[evildky]

as long as your running moderate boost and invest in a good A/F gauge you should be ok, 5-6 psi the stockers should keep up with a good FPR I recomend the aeromotove, I had a bosch on my car but it was a bit moody, as for the FMU I'd recomend a full stand alone, for the little extra money you get the abulity to program everything such as boost retard! it just depend on if you want a little improvement or a lot ! you can go low boost and pick up 50-60hp? or go balls out and double to tripple what the engine originally made! rome wsn't built in a day and you don't have to do all your mods at once, but be sure to run a good A/F gauge and stay conservitive with the boost, it's easy to get greedy and pop a motor, Ishould know I got greedy with Nitrous....ONCE ! so I try stay within proven limits when it comes to boost, but I'm sure you could pick up a set of Z31T injectors at a Junkyard for very little cash and give yourself a little extra room for error

[AZ-ZBum]

I wouldn't call a proven fuel management strategy that comes standard with nearly every low boost turbo kit on the market "ghetto rigging," but I guess youre entitled to your own uninformed opinion.

I'd like to know what experience you have with the Z31 and fuel injection in general. Fuel injectors are designed to operate within specific tolerances. Too much fuel pressure, and the electronic solenoid may not be able to open fast enough or at all. Kind of the inverse of suction cups. Place a suction cup on a glass surface and it's easy to pull off. But press it down so that it's held in place with the vacuum and it become much more difficult to pull straight off. The same principle applies here (except opposite). Push the injectors too much and they may not be able to properly open.

I guess logic must escape you.
Modified by AZ-ZBum at 12:23 PM 11/15/2004