well for one, it would be completely unregulated, because the fuel pressure regulator is in the tank on these cars.

On a lighter note, the new Mickey Thompson ET Street Radials are mounted and we are almost completely ready for the track tomorrow! Just need to load the car in the trailer.

http://i50.tinypic.com/2iayg5v.jpg

Update,

This dyno chart shows the comparison from Tuesday night and yesterday. Below are the comparative specs.

Run #13 from 2/19/2013
9.77 psi peak
18 Degrees of timing
91 Octane (pump)
2.5" FI straight test pipe Non Res X Pipe CBE

Run #6 from 2/20/2013
10.20 psi peak
22 degrees of timing
100 octane (pump)
2.5" FI straight test pipe Non Res X Pipe CBE

http://i371.photobucket.com/albums/o...psbf24fdfa.jpg

As stated in previous posts, we are dropping fuel pressure during the run. We currently are running the Aeromotive 340lph fuel pump in tank and have amped the voltage with a relay and thicker gauge wiring. In addition we have drilled out the swirl jet on the bottom of the canister as well as the FPR (Fuel Pressure Regulator). The pressure drops but stabilizes around 42 psi during full throttle in the higher rpm range. This is monitored by a gauge directly mounted to the fuel rail. We are in the process of adapting a secondary gauge to the fuel canister itself to find specifically where the pressure drop is occurring and why. Together with Charles from CJ Motorsports "aka" phunk we will come up with a solution. We are not totally convinced that the only solution is to switch to a return style fuel setup.

Since Uprev does not allow you to monitor fuel pressure in the software nor does this car have an external fuel pressure sensor plug-in anywhere, you are either installing a fuel pressure gauge right off of the fuel rail or bringing one into the car. Like I stated earlier, we feel that most people are not monitoring fuel pressure as long as the car is not running lean during testing on the dyno or street. You can see from our chart above that even though we are dropping fuel pressure we are still able to get the air/fuel ratio at an acceptable level. We are not comfortable turning up the boost anymore with the fuel pressure at 42-44 psi under a run until we can fix the issue. Because the fuel pressure is dropping it is requiring us to add substantially more fuel in the higher rpm range to the table. Every pound of boost added will make the fuel pressure drop lower in the current state that the car is in.

It is possible to run a boosted 370z with dropping fuel pressure for many years and never having an issue. That being said, there is eventually a breaking point where the pressure drop will become an problem. For example, as time goes by fuel pumps degrade, filters start to clog and your fuel pressure will eventually go lower and lower. It only takes your fuel pressure to drop below that breaking point for a split second one time at the right boost level to cause catastrophic engine failure. In addition keep in mind that your fuel pressure is much more erratic beating the car up and down the street than on the dyno. In between gear changes, constant on and off the throttle. At the end of day you are dealing with a fuel system that is mechanically regulated at the tank while fuel atomization is happening 7-8 feet away at the engine. Case in point, by the time the engine runs out of fuel it is too late for the regulator compensate.

In closing, we are getting ready to head back to the track first thing tomorrow morning. We have the car in a safe state and will run the boost around 8 psi and potentially turn it up to 10 psi. We will see how the day goes and keep everyone informed throughout the day and weekend.

Thank you all for your time and stay tuned...

Tony

Man that sounds very scary

Time to install a circulating fuel system....


ps; where are you getting 100 octane pump fuel???

It can be, but we listen for detonation through head phones tapped directly into the ECU and the car has never left the dyno with anything too aggressive. It is still in our hands and we will do everything in our power not to blow it up! I promise that it will be right when we are finished. We are just sharing everything in our findings with the community to keep you all included every step of the way.

Thanks, Tony

We are working on perfecting the fuel and rest assured that we will have it figured out.

There is one of 2 gas stations locally that we can get it from. I believe it is roughly $8.50 per gallon. I am going to get 10 gallons there tonight. I will take a picture and post if you the community.

Thanks, Tony

I enjoy you on the other side of the world!:tup:

Too bad I was before ....in F.I.

Otherwise, I would have ordered your kit!

Perfect job!

:tiphat:

I didn't research my first FI venture and paid for it. Just what I've been reading and what you have been sharing is just amazing. Also it is just amazing seeing this kit come to life. This will be my next winters project.:driving:

im very anxious to see the pricing for each stage. Definitely going this route... just gotta see how much I need to save up

Famoso bound with VP 100 octane! Stay tuned we will be updating this throughout the day

Also, I got to finally spend a little seat time in the car and all I have to say is WOW.. the boost was turned down to about 5psi and still pulled like a train! The car spools instantly, way faster than I imagined. Honestly I would compare it my families cls550 with the TT V8. 3rd gear and tip into the throttle even at 3k rpms and the car just takes off. It shreds my 305s like they are prius tires without even going WOT. I really cant express how pleased I am with the car. Out of boost the car drives like stock, it is not to loud, nor are there any other weird things that make the car less tolerable, but if you tip into the throttle be ready and hang on!!! I will obviously post up a more detailed review with tons of video and pictures. I want to publicly thank everyone from F.I and Specialty Z as they have far exceeded my expectations once again. Stay tuned for track times and other updates coming soon!

Thats the same price as our regular gas in Canada. Good deal :tup:

Have fun at the track!

:driving: Sounds awesome, I'll take note to raise my expectations higher than yours since F.I. has exceeded yours about 6 times in the past couple weeks :rofl2: Can't wait to see this run today! I say low 11"s at 130mph traps?

Is it really? Wow thats crazy! Thank you man!