For one, saying that the fuel pressure under load drops doesn't help your case - in a safety and reliability standpoint. For two, at idle, APS setups run 52 lbs of fuel pressure.

 

Oh and just as an FYI even though Turbonetics does not do what you claim they do (BTW every point you have made so far about the Turbonetics appears to be without any form of research) the Jim Wolf kit does. There are greater then 15 JWT equipped cars making power into the 500s with 440cc injectors and no return system. Guess what they are doing...running fuel pressure at a 4:1 ratio. So are you now going to tell me that Jim Wolf doesn't know what he's doing either? And as for the AC line. Me and taurran are sitting fine at almost 2 years with the kit and I personally have 40k miles on my car with the kit and without a single AC line issue yet.

 

You sure about that. Peter says the APS kit runs at 58 PSI of fuel pressure.

http://www.*************/350z/fuel/fuel.htm

And everyone should expect the pressure to drop some as there is no FPR in the Stage 1 kit. Clearly from the dynos and from my 40k miles with no issues its not necessary at the Stage 1 power levels.

 

I know of more than one shop/source that will say that JW's fuel system is questionable at best.

 

Just an FYI, that is how they are rating the injectors.

 

And how many of them are as qualified as Jim Wolf to make that statement? For that matter how many are even half as qualified?

Seems Garrett thinks Jim Wolf is pretty smart:

Are any of the shops you are referring to on that list?

 

Funny then that people are seeing that fuel pressure on their APS kits.

 

Funny, so why is this chart stating APS fuel pressure at the rail is 58 PSI?


APS Constant Differential Pressure
Fuel Rail Pressure

Injector Orifice Pressure Difference

Fuel Rail Pressure

Injector Orifice Pressure Difference
0 psi

58 psi

2 psi


60 psi

4 psi

62 psi

6 psi

64 psi

8 psi

66 psi

10 psi

68 psi

FYI thats from the APS website..


Looks to me like the base pressure is 58 and it goes up with boost as it should with an rising rate FPR installed.

 

I too see 58 lbs of fuel pressure on my kit -> at 6 lbs of boost

Just curious if Garrett is in the aftermarket turbo KIT business? or the turbo business?

Also, what makes JW the be-all of intelligence in regards to the Z? It is well known some of the reasons his kit is delivered with this fuel system:
1.) attempt to get carb approval
2.) keep costs down

More to the point though, I would love to hear more about info in regards to MRCs 'concerns' with the TN setup.

 

Oh shoot, you got me

guess my install was wrong, my tuner was wrong, my APS dealer was wrong, and my fuel pressure gauge is wrong.

With all this going wrong, I guess I should have bought a TN setup.

 

No but maybe you should know what you are saying is true before you say it.

 

I think that this is the post to which MRC will retalliate with the VRT's over-corrected dyno argument...
Gotta love the forums...

 

Am I lying? Tuan, what should my fuel pressure be at idle? It should be around 52 lbs. Good that's what I am seeing

 

Nothing makes JWT the end all be all of Z products. But when Garrett specifically calls them out to produce kits for Nissan cars I think that says something. I mean I guess it not a big deal that Jim Wolf helped Garrett design the GT28RS. I mean its not like Jim Wolf knows anything about turbos or turbo kits. He's only been at this for 20 years now. What could he possibly know

 

There might be another shop or two around that would back MRC up in that claim

 

Funny then that the kit manufacturer says otherwise... guess Tuan knows more then Peter?

 

honestly, less than people give him credit for from the research I have done.

 

Well I guess its easy to say that since you've never talked to the man or seen his work in person. Maybe its because I've been playing with Nissan's my whole life but I think any Nissan head who has been around for a while will tell you jim Wolf knows some ****. But then I guess not. You obviously are more then qualifed to dicredit his research, work, and credentials. So why don't you go ahead and tell us what your "research" has turned up that proves Jim Wolf knows less then everyone thinks he knows. I'm sure we're all dying to hear it.

 

What Ziv is saying is this: there is more than one way to skin a cat, but there is only one BEST way. I personally wouldn't feel comfortable with the JWT fuel kit if I were in the game for a new TT kit. First thing I'd do would be to upgrade the fuel system and ECM which would make it more much expensive than the APS, if I'm not mistaken. My two cents.

 

FYI the turbos in the APS kit are also Garrett turbos, specifically designed for APS. Im sure Garrett may have shared some of the desighn with the JWT kit. Not that JWT has anything to do with my comments..But IMO JWT used the fuel system they did, to get the carb approval and keep costs down, the second of which they did not succeed considering the JWT kit retail is in the $7900 range last I heard, and half as complete as the APS system. I think JWT used their fuel solution as a cost effective solution, whereas APS does not care to keep costs down, but to "over engineer" their systems.
Case in point, pick up any pipe from and APs kit, and compare the inside finish and welds to that of the TN, or Greddy for that matter..You will see that APS grinds all of its weld smooth, and finishes every sinle pipe flawlessly.This acomplishes 2 things.
1) to reduce any restriction in airflow
2) to keep and pieces of excess welds or debris from being in the pipe where it should not be.

Now, show me one TN owner that has successfully run their stock TN fuel system over 450whp for over 30,000 hard miles...You can not..I assure you.