This is from JRP's website:

Install pics and dyno chart:



http://www.jrponline.com/gallery/350z.asp

if this is the kit as-is straight from the box it's a bit disappointing i might say! comments anyone?

 

The A/F ratio explains part of it.

--Steve

 

oh for sure the a/f ratio makes a big difference in this ugly dyno. but man...this thing is runnin pig rich! so rich to the point that the o2 sensor can't even register the numbers. is running that rich healthy for the car? i'd be afraid of washing out my cylinders with gas!

 

Those numbers are extremely low and I suspect that they were obtained with low boost and no tuning because the a/f ratio looks like that thing is getting drowned with fuel. My Greddy produced 369 rwhp at around 6.5 boost, but it is running lean at higher rpms. My installer is working out a solution to the lean condition now.

 

Yep, waaaay too rich. Check out Guru's install post. They made 369 rwhp on 6.5 psi.

 

but what if i don't want to raise boost levels? am i SOL?

 

Hi,

On my kit is came to 352 rwhp on the standard 5.6 PSI. COuld it be that the Dyno just measures low?

Shaun

 

Shaun, can you post a copy of your dyno with the A/F ratio? What is the highest ratio you have at the 5.6 psi? Did you tune the kit with the e-01 to get to 352 rhp or is that right from the box without tuning?

 

Dyno could be low, but that A/F is downright BAD for the car, IMO.

--Steve

 

It looks like in the video your not making full boost. I only read a max of 4psi. check to make sure your not leaking anywhere.

 

When I scanned my Dyno the file size was almost 30 MB. So I can't post it here. I just had the installer use the standard kit. I have not tuned it at all.

Shaun

 

correct me if i'm wrong, but the dyno chart indicates that these are not SAE corrected numbers. being cold as frikkin hell in Canada now, wouldn't that atleast lean out the air/fuel mixture?

 

do any of the kits come with an ECU re-map program?
it seems to me that without proper ECU tuning, it would be difficult to get the a-f to acceptable levels...
i've got to believe that the cost of of these kits should have some provision for proper tuning of the stock or ECU or at least some kind of module that interfaces with it that a tuner could program/modify...

 

Mike,

What type of BOV are you using?

 

Actually the E-Manage can tune fuel just fine even at much higher boost levels. It is not a lack of fuel control or injector size but rather fuel pressure. The above chart looks like maybe there was a boost leak or other problem?

 

I'd say the AFR accounts for the whole story.......but at least it will stay together (though not be good on gas )

 

Or plugs.

 

Mike,

Since you are too rich, your first step is to find out why. It could be one of two reasons:
1. Too much fuel
2. Not enough air

Now you need to look into each of those in more detail. Since it seems like others are running the stock Greddy setup and are much more lean, it seems like chances are slim that you are somehow getting way more fuel than they are. More likely is that you are somehow not getting enough air. Therefore, double check the manifold pressure if possible (maybe there is a boost gauge with the kit that will tell you if you are making the correct amount of boost). If that is OK then you know you are getting enough air and need to revisit the fuel issue. If your boost is low, then look and listen for leaks, check the mounting of any wastegates, etc.

You really need to take a step by step approach, starting from the basic problem and working your way down. Try to figure out measurements that can eliminate an entire branch of possibilities (like measuring manifold pressure to maybe eliminate any leak possibilities). You will eventually find the cause and be able to fix your problem.

Good luck!

-D'oh!

 

Hold up guys! This is not my kit! Just something I found on their website!

 

Another obvious question to ask is whether this graph is from a kit with an intercooler. The low density of heated air could account for the crappy air/fuel.