eBay:
http://cgi.ebay.com/ebaymotors/ws/eB...927063431&rd=1

 

i dont suppose these will fit my car? If so i'm all over them, but will that be to much fuel for my s/c setup with a 3.125 pulley?

 

Nope, just 4th gens.. If you look at them, they're side feed, you and I, have top-feed.

Just hold on though, I'm working on something right now, I HOPE comes through.

 

Or you can get 550's for half the price.

 

Well for NISMO ones - that's a hell of a deal. I actually bought mine from the same seller for that price.

 

Nismo's are just stock JECS injectors with larger holes on the end.

 

Regardless though - they're tried and true - not knocking on you or anything, hope ya don't take it like that.

 

No, not at all. I just wanted to make the point that nismo injectors are not some totally different production part. They are just stock injectors with larger holes is all.

 

I got my 740s from this same person.

 

what brand options do i have for 370's to fit a 2000

 

Mainly the oem Nissan injectors for a 95-96 TT 300zx

 

look for 350z injectors. Power Enterprise has 380cc

 

ahh sorry - didnt notice u have a 5th gen - the TT 300zx ones won't work for you since u have top feed. The power enterprise ones will work - we just installed a set of 555cc PE's on a 5th gen a few days ago.

 

Did they fit like a glove, ie perfect? What fuel management did they use?

BTW, PE says they're 510cc, but I hear they're ~470cc actually, since they're rated at 52psi, ie 350Z OEM fuel pressure.

 

Hey Icey... got links to the PE's? These will work on the 5.5 gens, right?

 

Nobody has tried them on 5.5gens, however I believe physical dimension wise, they are the same and should work. You guys just operate at a higher stock fuel pressure then VQ30s, so make sure you take that into account.

You can get them at gruppe-s, however I'd wait and see if my lead turns out and we'll have better injectors for less cost.

 

I think he'll post pics later but...

Instead of the little injector "hats" that are oem and made of plastic - there is a metal ring that is used in place - The entire injector is slightly shorter..... it'll be easier to understand once the pics are posted. Anyway- everything bolted up fine.... as far as how well they work - we'll see once he finishes his numerous projects

As far as management - emanage

 

hey icey..

so is your lead better than paying the $400 that this guy is asking? I guess he got them from you originally?

http://forums.maxima.org/showthread.php?t=344416

 

No, my lead is NOT cheaper then that...more like $750(I'm HOPING) vs. $870 for PEs, which both are Plug-N-Play. RCs aren't Plug-N-Play, they require splicing on electric pigtails and using fuel rail spacers and possibly slight grinding on the fuel rail for clearance issues. If you don't mind that minimal hassle, those RCs are about as cheap as you'll find, unless you don't mind slightly used($300-$370).

One concern though is that RC injectors tend to idle poorly and have poor atomization at lower pulse widths compared to OEM, PEs, or my leads. 5.5gens use 52psi base fuel pressure, so that makes 440cc injectors flow like 480cc injectors. Deac had issues with RC550s, so you might also.

350Z guys with Greddy TT kits are going to be dumping the RC440s that come in their kits for larger injectors right and left soon, so they'll become cheap. Good for us~!

 

I wish he'd send one out to get flow tested.

 

The problem is that the e-manage will only control the 440s and no higher. I would love to go higher (550cc) but have no way of doing so, unless I try a TS ecu upgrade.

 

Not true....You're basing that off sloppy RC440s that have poor atomization/large on/off injector times plus people that don't know what they're doing.

The eManage *CAN* and has controlled larger, you just can't slap them in and expect the factory ECU to play nice.

Get PE, OEM style, or similar type injectors and then peform an Idle Air Volume Learning procedure and it will work. If you run a returnless fuel setup, definitely do-able by turning down base fuel pressure.

TS can ONLY control open-loop fuel/timing maps same as eManage, so I don't buy the you need a 380cc reflash inorder to run 500cc+ injectors. 350Z guys just want P-N-P and TS is awesome in that reguard.

 

I just thought that when greddy says the e-manage can support 150% bigger injectors, then thats what they meant... which might be why people don't go bigger than 440s with stock ecu fuel maps. If TS upgrades the stock ecu to support 380s then the e-manage could take that * 150% and you could run up to 570s. (This is more of a question than a statement, I am still uncertain so any response would help)

So your saying that if I perform the Idle Air Volume Learning procedure and do some more tuning on my fuel map, that I can run bigger than 440s (and still keep the car running smoothly)?

 

270cc X 2.5(100%+150%) = 675cc

My *THEORY* on the problem is that the eManage shortens pulse-width via conditioning the MAF voltage, which indirectly affects timing. The ECU has a target RPM it tries to maintain, which utilizes timing, airflow, IPW, and some other factors. When you change ANY of these, the ECU needs to go through the IAVL procedure per the FSM. It will help, however the point of the stock ECUs limits to compensate is unknown IMO. TS has the ability to modify timing during cold start to help compensate, however the eManage can't advance timing, so you're limited by the stock ECUs amount of advance.

My other theory is that once you exceed a certain point, the IPW can't go any smaller due to minimum limit of the injector on/off time or because the atomization of the fuel becomes erratic. The "point" depends on the quality/type of the fuel injector. RCs use 3 LARGE holes to pass fuel through where as OEM uses 4 very small holes and PEs use 8 or 10 very small holes. This determines atomization, ie how fine of a mist, and how the shape of the spray exits the injector and hits the back of the valve. There is a science here and from the small amount I've read/learned, RCs aren't necessarily made for small IPW, low RPM, and smooth idle characteristics. They are made to flow LARGE amounts of fuel in short periods of time especially high in the RPM band when valve opening/closing is shortest, however OEMs, PEs, Bosch, etc. are made to atomize fuel optimally at low/mid range for good idle, torque response, and good fuel economy/emissions.

 

Thanks for your response. I just want to keep the car running smooth even with the increased injector size and I don't want to get injectors that are too big and won't run correctly with my setup.

Can you explain this equation?


I have the e-manage advancing timing 2 deg in vacuum. The e-manage has to be connected correctly, with the ignition wires 1-6 connected to cylinders 1-6 respectively. If I set the ignition map to switch from +2 deg. in vaccum to -2 deg. in boost, I can actually feel the jump in timing, which leads me to believe the e-manage CAN advance timing. I will connect my OBD scan tool and try to confirm if there is any disbelief.

 

150% of 270 is 405. You have to figure it out this way: 100% of 270 = 270. 50% of 270 = 135. 270+135=405.

Your calculation of 440 is actually about 63% (270 * 1.63 = 440.1)

The e-manage can control injectors up to 150% bigger than the stock injector.

Your stock injector is 270 - add to that 150% and you get the 675 size.

 

Then do NOT get RCs. Get PEs or try finding a Bosch equivalent like SSR did on their Altima/G35 or wait for me to see what price I end up paying once imported from Japan on mine. Could be WAY way more then PEs once I pay through my contact, however using straight Japan prices these SHOULD be considerably cheaper then PEs. Considerably cheaper doesn't mean CHEAP by any means. IMO, injectors aren't the thing to skimp on...just my .02.

Hey...that's great news. I'm just basing this off what several others have posted, ie no hands on experience. I hope you are correct. What you could do is scan with no timing advance, then with timing advance, and then again with no timing advance, and graph them against each other. That could work, but with such a small amount it might be difficult to see any difference, ie +2 when you're going from 15-degrees to near 40-60degrees at redline.

 

Thanks for the explaination. I thought it was just 1.5 times the stock injector size instead of 1.5 times greater than the stock injector size.

 

no problem... gives me an opportunity to show off my knowledge of the e-manage and injectors....

unfortunately, this is the limit of my knowledge...