Nissan 370Z Forum

Nissan 370Z Forum (http://www.the370z.com/)

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- - Pro EFI (http://www.the370z.com/forced-induction/91165-pro-efi.html)

Yup vvel is a mother when it comes to tunning. I had a box once that could drive the vvel assemblies from a commanded rc square wave signal, but i couldnt find a cheap enough standalone with dual etb drivers for the throttles and custom mapable servo output, then i would have had to write up an interferance table. I got as far as moving the vvel actuators with a pot on the bench and gave up there.

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Well... maybe just build an independent controller like you did, put a little knob on the dash, and just find one static spot that works the best for you on the dyno? Then you can run an EMS like any other car in the world. (not being serious really)

yeah that'd work lol no the goal was to use the servo out from the standalone to drive the box, but unfortunately there just aren't any nearly affordable ecu's with dual dbw for the throttles, i could have done cable throttles, but you also lose your guages too and there were just too many things that wouldn't work after removing the ecu.

Quote:

Originally Posted by phunk (Post 2857240)

The FCON V Pro, I mean, I guess you COULD run it... but while a full standalone, the FCON could not run even a VQ35DE without the stock ECU, let alone a VQ37VHR. So say you spliced it in with the VHR harness anyway (pretty easy), here are some problems:

1: you are stuck using MAFs. Speed density isnt an option with VVEL... then again, this should be the case with any EMS not just the V Pro, wouldnt it?

2: Accel / Decel fuel trims. So, you splice into your TPS sensors so you can manage your accel and decel trims. Thats going to be an issue when your VVEL system is adjusting engine load with the valvetrain rather than the throttle bodies. VVEL causes changes in engine load that are not directly reflected in the actions of the throttle plates. The VVEL system is the last thing to touch the air before it enters the cylinders and the throttles obviously are none the wiser... to get this to run clean, you are going to need an EMS that is aware of the VVEL system and what its doing as its doing it... and you are going to need a secondary accel fuel trim map that is based on the actions of the VVEL system. ami right? I see this as being more hassle than its worth as far as setup and configuration with any EMS at all unless one of the manufacturers steps up to the plate and puts the features clear and easy in their software.

So, you can put the FCON in there and start it up... but I dont know who is going to enjoy driving that car for more than a few minutes without functional accel/decel trims

Have you done this before or is this a speculation?

Is their anyone who is making more than 650whp with bigger turbos?

Seems like most people have Potatoe disk turbos on this forum.

disco potato's and there are guys with disco potatos running over 650. tt370z for one I know off hand

I don't doubt it at all. I'm sure his car is quick but I'm looking for more top end power.

I was also looking at a hallinger transmission to eliminate lag times, but the price is a heart attack times 3.

What about builtit guy? He's signature says 1000hp. Is that true or hype?

thats the one car over 800 that is at gtm

Tt370z is at 801whp and 700lb-lbs of torque on twin gt3071. The 1000whp Z has only been dyno proven(to the community at least) for 860whp I'm not sure we ever figured out why it couldn't hit 1000whp. Pretty unimpressive when there is at least 1 car there on stock displacement. I will be shortly behind him except I'm going to do it with the GT2860s. I see no need for 1000whp in this little car. To me it's just chasing numbers; it'll already be a low 9 second car.
More on topic of your OP though it has been confirmed to me; in person, by both Dustin and Hal at dynosty that the Haltec Platinum is supposed to be released at the end of this year with the capabilities to act as a stand alone for our cars. The first question out of my mouth was "will it be able to control the VVEL?" I was assured by dustin that it would though until I see results it is just speculation. The new Haltech unit is a definite thing though.

Quote:

Originally Posted by 37winner (Post 2857262)

Have you done this before or is this a speculation?

I used to run the FCON on the DE's. I was the first person in the USA to run it, and tested the patch harness that HKS was releasing. Actually made the DE stock engine power record with it during the first tuning session, and held it for years! So I am pretty familiar with the FCON... although there are parts of it I never bothered to learn.

To answer your questions, no I have not put the FCON in the 370z... but that doesnt make my concerns purely speculation either. For if those issues didnt exist, I would have already put the FCON in my car. The FCON is by the far the cleanest and easiest to use EMS I have tried... it may be lacking some of the cool features but you cannot argue how easy it is to make a car run perfect with it. I would jump on it in an instant if it were realistic for the 370z.

This is all great information. I'm really curious as to if ROM tuning can suffice higher end needs. I was reading about ROM tuning how they have a certain window of bits and cells or something. I'm not really familiar with tuning or anything, so please don't quote me on it. But to break down the long story short, heard ROM tuning can only go so far. I'm planning to do a top mount with two 62mm turbos, and I'm VERY curious to see if UpRev can handle it. I hope this makes sense.

But again thank you all for your input. It is very helpful. But would you know anything about the Pro EFI engine management systems?

This is off topic but does anyone know about sequential transmission? I don't really plan to do this, but it is very interesting. I was looking at this company, Holinger Engineering - Home, anyone know of anyone who did this to their cars?

This looks freaking sweet!

the quaife qbe69g can be ordered with a vq bellhousing, just need to make sure it is the HR/VHR bolt patern and not the DE out of the earlier 350z.

Also did you get your heads figured out?

Yeah I got it all figured out. Thanks to g&q forum member and jtran motorsports in houston. Thanks for asking! It's a pain in the ***.

And what you mentioned is it the transmission stuff?

Thanks for all the help!

Its a complete sequential trans. Its only $11,000

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